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Pakhomov AV, Hammerschmidt M, Burger S, Pertsch T, Setzpfandt F. Modeling of surface-induced second-harmonic generation from multilayer structures by the transfer matrix method. OPTICS EXPRESS 2021; 29:9098-9122. [PMID: 33820345 DOI: 10.1364/oe.417066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
We analytically and numerically investigate surface second-harmonic generation (SHG) from a stack of dielectric layers. We develop a theoretical formalism based on the transfer matrix method for the calculation of the surface-driven second-harmonic radiation from multilayer structures and elaborate it for the case of ultrathin dielectric layers using a power series expansion to derive the effective surface nonlinear tensor for the whole stack. We show that for deeply subwavelength thicknesses of the layers the surface responses from all interfaces can efficiently sum up, leading to largely enhanced efficiency of SHG. As a result, such surface-driven nonlinearity can become comparable to the bulk nonlinearity in noncentrosymmetric semiconductors and can yield high performance for nonlinear nanophotonic applications.
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2
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On the possibility of a terahertz light emitting diode based on a dressed quantum well. Sci Rep 2019; 9:16320. [PMID: 31705055 PMCID: PMC6841726 DOI: 10.1038/s41598-019-52704-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 10/22/2019] [Indexed: 11/08/2022] Open
Abstract
We consider theoretically the realization of a tunable terahertz light emitting diode from a quantum well with dressed electrons placed in a highly doped p-n junction. In the considered system the strong resonant dressing field forms dynamic Stark gaps in the valence and conduction bands and the electric field inside the p-n junction makes the QW asymmetric. It is shown that the electrons transiting through the light induced Stark gaps in the conduction band emit photons with energy directly proportional to the dressing field. This scheme is tunable, compact, and shows a fair efficiency.
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3
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Matteo D, Pigeon J, Tochitsky SY, Huttner U, Kira M, Koch SW, Moloney JV, Joshi C. Control of the nonlinear response of bulk GaAs induced by long-wavelength infrared pulses. OPTICS EXPRESS 2019; 27:30462-30472. [PMID: 31684294 DOI: 10.1364/oe.27.030462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 09/15/2019] [Indexed: 06/10/2023]
Abstract
The nonlinear optical response of GaAs is studied using extremely nonresonant 10 μm laser pulses with peak intensities greater than 2 GW/cm 2. We observe over an order of magnitude enhancement in the four-wave mixing efficiency by decreasing the CO 2 laser beat-wave frequency. This enhancement is attributed to currents of photoexcited unbound carriers modulated at the beat frequency, confirmed by measurements of nonlinear absorption at this long wavelength as well as a fully microscopic analysis of the excitation dynamics. Modeling of such nonperturbative semiconductor-laser interactions predicts that further decreasing the beat frequency can increase the nonlinear response and allow for its control over two orders of magnitude.
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4
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Jirauschek C, Riesch M, Tzenov P. Optoelectronic Device Simulations Based on Macroscopic Maxwell–Bloch Equations. ADVANCED THEORY AND SIMULATIONS 2019. [DOI: 10.1002/adts.201900018] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Christian Jirauschek
- Department of Electrical and Computer EngineeringTechnical University of MunichArcisstr. 21 80333 Munich Germany
| | - Michael Riesch
- Department of Electrical and Computer EngineeringTechnical University of MunichArcisstr. 21 80333 Munich Germany
| | - Petar Tzenov
- Department of Electrical and Computer EngineeringTechnical University of MunichArcisstr. 21 80333 Munich Germany
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5
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Chisuga Y, Mashiko H, Oguri K, Katayama I, Takeda J, Gotoh H. Electric dipole oscillation in solids characterized by Fourier transform extreme ultraviolet attosecond spectroscopy. EPJ WEB OF CONFERENCES 2019. [DOI: 10.1051/epjconf/201920502015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We characterized electronic dipole oscillations in chromium doped sapphire (Cr:Al2O3) using Fourier transform extreme ultraviolet attosecond spectroscopy (FTXUV) combined with an isolated attosecond pulse, which reveals the electric band-structure and dephasing process in solids.
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6
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Mashiko H, Chisuga Y, Katayama I, Oguri K, Masuda H, Takeda J, Gotoh H. Multi-petahertz electron interference in Cr:Al 2O 3 solid-state material. Nat Commun 2018; 9:1468. [PMID: 29670122 PMCID: PMC5906618 DOI: 10.1038/s41467-018-03885-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 03/20/2018] [Indexed: 11/17/2022] Open
Abstract
Lightwave-field-induced ultrafast electric dipole oscillation is promising for realizing petahertz (1015 Hz: PHz) signal processing in the future. In building the ultrahigh-clock-rate logic operation system, one of the major challenges will be petahertz electron manipulation accompanied with multiple frequencies. Here we study multi-petahertz interference with electronic dipole oscillations in alumina with chromium dopant (Cr:Al2O3). An intense near-infrared lightwave-field induces multiple electric inter-band polarizations, which are characterized by Fourier transform extreme ultraviolet attosecond spectroscopy. The interference results from the superposition state of periodic dipole oscillations of 667 to 383 attosecond (frequency of 1.5 to 2.6 PHz) measured by direct time-dependent spectroscopy and consists of various modulations on attosecond time scale through individual electron dephasing times of the Cr donor-like and Al2O3 conduction band states. The results indicate the possible manipulation of petahertz interference signal with multiple dipole oscillations using material band engineering and such a control will contribute to the study of ultrahigh-speed signal operation. Signal processing in electronic devices is in the THz regime. Here the authors measure NIR lightwave-field-induced multiple dipole oscillations in Cr:Al2O3 in the time domain reaching PHz scale by using an isolated attosecond pulse and this method shows potential for higher speed signal processing.
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Affiliation(s)
- Hiroki Mashiko
- NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa, 243-0198, Japan.
| | - Yuta Chisuga
- NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa, 243-0198, Japan.,Department of Physics, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama, 240-8501, Japan
| | - Ikufumi Katayama
- Department of Physics, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama, 240-8501, Japan
| | - Katsuya Oguri
- NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa, 243-0198, Japan
| | - Hiroyuki Masuda
- NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa, 243-0198, Japan.,Department of Physics, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama, 240-8501, Japan
| | - Jun Takeda
- Department of Physics, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama, 240-8501, Japan
| | - Hideki Gotoh
- NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa, 243-0198, Japan
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7
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Langer F, Hohenleutner M, Schmid CP, Poellmann C, Nagler P, Korn T, Schüller C, Sherwin MS, Huttner U, Steiner JT, Koch SW, Kira M, Huber R. Lightwave-driven quasiparticle collisions on a subcycle timescale. Nature 2016; 533:225-9. [PMID: 27172045 PMCID: PMC5034899 DOI: 10.1038/nature17958] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 03/18/2016] [Indexed: 12/24/2022]
Abstract
Ever since Ernest Rutherford scattered α-particles from gold foils, collision experiments have revealed insights into atoms, nuclei and elementary particles. In solids, many-body correlations lead to characteristic resonances--called quasiparticles--such as excitons, dropletons, polarons and Cooper pairs. The structure and dynamics of quasiparticles are important because they define macroscopic phenomena such as Mott insulating states, spontaneous spin- and charge-order, and high-temperature superconductivity. However, the extremely short lifetimes of these entities make practical implementations of a suitable collider challenging. Here we exploit lightwave-driven charge transport, the foundation of attosecond science, to explore ultrafast quasiparticle collisions directly in the time domain: a femtosecond optical pulse creates excitonic electron-hole pairs in the layered dichalcogenide tungsten diselenide while a strong terahertz field accelerates and collides the electrons with the holes. The underlying dynamics of the wave packets, including collision, pair annihilation, quantum interference and dephasing, are detected as light emission in high-order spectral sidebands of the optical excitation. A full quantum theory explains our observations microscopically. This approach enables collision experiments with various complex quasiparticles and suggests a promising new way of generating sub-femtosecond pulses.
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Affiliation(s)
- F Langer
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
| | - M Hohenleutner
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
| | - C P Schmid
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
| | - C Poellmann
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
| | - P Nagler
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
| | - T Korn
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
| | - C Schüller
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
| | - M S Sherwin
- Department of Physics and the Institute for Terahertz Science and Technology, University of California at Santa Barbara, Santa Barbara, California 93106, USA
| | - U Huttner
- Department of Physics, University of Marburg, 35032 Marburg, Germany
| | - J T Steiner
- Department of Physics, University of Marburg, 35032 Marburg, Germany
| | - S W Koch
- Department of Physics, University of Marburg, 35032 Marburg, Germany
| | - M Kira
- Department of Physics, University of Marburg, 35032 Marburg, Germany
| | - R Huber
- Department of Physics, University of Regensburg, 93040 Regensburg, Germany
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8
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Wismer MS, Kruchinin SY, Ciappina M, Stockman MI, Yakovlev VS. Strong-Field Resonant Dynamics in Semiconductors. PHYSICAL REVIEW LETTERS 2016; 116:197401. [PMID: 27232043 DOI: 10.1103/physrevlett.116.197401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Indexed: 06/05/2023]
Abstract
We predict that a direct band gap semiconductor (GaAs) resonantly excited by a strong ultrashort laser pulse exhibits a novel regime: kicked anharmonic Rabi oscillations. In this regime, Rabi oscillations are strongly coupled to intraband motion, and interband transitions mainly take place when electrons pass near the Brillouin zone center where electron populations undergo very rapid changes. The asymmetry of the residual population distribution induces an electric current controlled by the carrier-envelope phase of the driving pulse. The predicted effects are experimentally observable using photoemission and terahertz spectroscopies.
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Affiliation(s)
- Michael S Wismer
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
| | | | - Marcelo Ciappina
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
| | - Mark I Stockman
- Center for Nano-Optics (CeNO) and Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30340, USA
| | - Vladislav S Yakovlev
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
- Center for Nano-Optics (CeNO) and Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30340, USA
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9
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Kristinsson K, Kibis OV, Morina S, Shelykh IA. Control of electronic transport in graphene by electromagnetic dressing. Sci Rep 2016; 6:20082. [PMID: 26838371 PMCID: PMC4738282 DOI: 10.1038/srep20082] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 11/23/2015] [Indexed: 11/25/2022] Open
Abstract
We demonstrated theoretically that the renormalization of the electron energy spectrum near the Dirac point of graphene by a strong high-frequency electromagnetic field (dressing field) drastically depends on polarization of the field. Namely, linear polarization results in an anisotropic gapless energy spectrum, whereas circular polarization leads to an isotropic gapped one. As a consequence, the stationary (dc) electronic transport in graphene strongly depends on parameters of the dressing field: A circularly polarized field monotonically decreases the isotropic conductivity of graphene, whereas a linearly polarized one results in both giant anisotropy of conductivity (which can reach thousands of percents) and the oscillating behavior of the conductivity as a function of the field intensity. Since the predicted phenomena can be observed in a graphene layer irradiated by a monochromatic electromagnetic wave, the elaborated theory opens a substantially new way to control electronic properties of graphene with light.
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Affiliation(s)
- K Kristinsson
- Division of Physics and Applied Physics, Nanyang Technological University, 637371, Singapore
| | - O V Kibis
- Division of Physics and Applied Physics, Nanyang Technological University, 637371, Singapore.,Department of Applied and Theoretical Physics, Novosibirsk State Technical University, Karl Marx Avenue 20, Novosibirsk 630073, Russia
| | - S Morina
- Division of Physics and Applied Physics, Nanyang Technological University, 637371, Singapore.,Science Institute, University of Iceland, Dunhagi-3, IS-107, Reykjavik, Iceland
| | - I A Shelykh
- Division of Physics and Applied Physics, Nanyang Technological University, 637371, Singapore.,Science Institute, University of Iceland, Dunhagi-3, IS-107, Reykjavik, Iceland.,ITMO University, St. Petersburg 197101, Russia
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10
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11
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Vampa G, Hammond TJ, Thiré N, Schmidt BE, Légaré F, McDonald CR, Brabec T, Corkum PB. Linking high harmonics from gases and solids. Nature 2015; 522:462-4. [PMID: 26108855 DOI: 10.1038/nature14517] [Citation(s) in RCA: 178] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 04/27/2015] [Indexed: 11/09/2022]
Abstract
When intense light interacts with an atomic gas, recollision between an ionizing electron and its parent ion creates high-order harmonics of the fundamental laser frequency. This sub-cycle effect generates coherent soft X-rays and attosecond pulses, and provides a means to image molecular orbitals. Recently, high harmonics have been generated from bulk crystals, but what mechanism dominates the emission remains uncertain. To resolve this issue, we adapt measurement methods from gas-phase research to solid zinc oxide driven by mid-infrared laser fields of 0.25 volts per ångström. We find that when we alter the generation process with a second-harmonic beam, the modified harmonic spectrum bears the signature of a generalized recollision between an electron and its associated hole. In addition, we find that solid-state high harmonics are perturbed by fields so weak that they are present in conventional electronic circuits, thus opening a route to integrate electronics with attosecond and high-harmonic technology. Future experiments will permit the band structure of a solid to be tomographically reconstructed.
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Affiliation(s)
- G Vampa
- Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - T J Hammond
- Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - N Thiré
- INRS-EMT, 1650 boulevard Lionel-Boulet, CP 1020, Varennes, Québec J3X 1S2, Canada
| | - B E Schmidt
- INRS-EMT, 1650 boulevard Lionel-Boulet, CP 1020, Varennes, Québec J3X 1S2, Canada
| | - F Légaré
- INRS-EMT, 1650 boulevard Lionel-Boulet, CP 1020, Varennes, Québec J3X 1S2, Canada
| | - C R McDonald
- Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - T Brabec
- Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - P B Corkum
- 1] Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada [2] National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
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12
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Wang YH, Steinberg H, Jarillo-Herrero P, Gedik N. Observation of Floquet-Bloch states on the surface of a topological insulator. Science 2013; 342:453-7. [PMID: 24159040 DOI: 10.1126/science.1239834] [Citation(s) in RCA: 242] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The unique electronic properties of the surface electrons in a topological insulator are protected by time-reversal symmetry. Circularly polarized light naturally breaks time-reversal symmetry, which may lead to an exotic surface quantum Hall state. Using time- and angle-resolved photoemission spectroscopy, we show that an intense ultrashort midinfrared pulse with energy below the bulk band gap hybridizes with the surface Dirac fermions of a topological insulator to form Floquet-Bloch bands. These photon-dressed surface bands exhibit polarization-dependent band gaps at avoided crossings. Circularly polarized photons induce an additional gap at the Dirac point, which is a signature of broken time-reversal symmetry on the surface. These observations establish the Floquet-Bloch bands in solids and pave the way for optical manipulation of topological quantum states of matter.
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Affiliation(s)
- Y H Wang
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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13
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Wagner M, Schneider H, Stehr D, Winnerl S, Andrews AM, Schartner S, Strasser G, Helm M. Observation of the intraexciton Autler-Townes effect in GaAs/AlGaAs semiconductor quantum wells. PHYSICAL REVIEW LETTERS 2010; 105:167401. [PMID: 21231010 DOI: 10.1103/physrevlett.105.167401] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Indexed: 05/30/2023]
Abstract
The near-infrared transmission of a semiconductor multiple quantum well is probed under intense terahertz illumination. We observe clear evidence of the intraexcitonic Autler-Townes effect when the terahertz beam is tuned near the 1s-2p transition of the heavy-hole exciton. The strongly coupled effective two-level system has been driven with terahertz field strengths of up to 10 kV/cm resulting in a Rabi energy of ≈0.6 times the transition energy. The induced near-infrared spectral changes at low intensities are qualitatively explained using a basic two-level model.
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Affiliation(s)
- Martin Wagner
- Institute of Ion Beam Physics and Materials Research, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, 01314 Dresden, Germany
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14
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Priyadarshi S, Racu AM, Pierz K, Siegner U, Bieler M, Duc HT, Förstner J, Meier T. Reversal of coherently controlled ultrafast photocurrents by band mixing in undoped GaAs quantum wells. PHYSICAL REVIEW LETTERS 2010; 104:217401. [PMID: 20867134 DOI: 10.1103/physrevlett.104.217401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Indexed: 05/29/2023]
Abstract
It is demonstrated that valence-band mixing in GaAs quantum wells tremendously modifies electronic transport. A coherent control scheme in which ultrafast currents are optically injected into undoped GaAs quantum wells upon excitation with femtosecond laser pulses is employed. An oscillatory dependence of the injection current amplitude and direction on the excitation photon energy is observed. A microscopic theoretical analysis shows that this current reversal is caused by the coupling of the light- and heavy-hole bands and that the hole currents dominate the overall current response. These surprising consequences of band mixing illuminate fundamental physics as they are unique for experiments which are able to monitor electronic transport resulting from carriers with relatively large momenta.
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Affiliation(s)
- S Priyadarshi
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany
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15
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Compton R, Filin A, Romanov DA, Levis RJ. Observation of broadband time-dependent Rabi shifting in microplasmas. PHYSICAL REVIEW LETTERS 2009; 103:205001. [PMID: 20365985 DOI: 10.1103/physrevlett.103.205001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2009] [Indexed: 05/29/2023]
Abstract
Coherent broadband radiation in the form of Rabi sidebands is observed when a ps probe laser propagates through a weakly ionized, electronically excited microplasma generated in the focus of an intense pump beam. The sidebands arise from the interaction of the probe beam with pairs of excited states of a constituent neutral atom via the probe-induced Rabi oscillation. Sideband shifting of >90 meV from the probe carrier frequency results in an effective bandwidth of 200 meV. The sidebands are controlled by the intensity and temporal profile of the probe pulse; with amplitude and shift in agreement with the predictions of a time-dependent generalized Rabi cycling model.
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Affiliation(s)
- Ryan Compton
- Center for Advanced Photonics Research, Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
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16
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Golde D, Meier T, Koch SW. Microscopic analysis of high-harmonic generation in semiconductor nanostructures. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pssc.200880309] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Van Vlack C, Hughes S. Carrier-envelope-offset phase control of ultrafast optical rectification in resonantly excited semiconductors. PHYSICAL REVIEW LETTERS 2007; 98:167404. [PMID: 17501461 DOI: 10.1103/physrevlett.98.167404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2006] [Indexed: 05/15/2023]
Abstract
Ultrashort pulse light-matter interactions in a semiconductor are investigated within the regime of resonant optical rectification. Using pulse envelope areas of around 1.5-3.5 pi, a single-shot dependence on carrier-envelope-offset phase (CEP) is demonstrated for 5 fs pulse durations. A characteristic phase map is predicted for several different frequency regimes using parameters for thin-film GaAs. We subsequently suggest a possible technique to extract the CEP, in both sign and amplitude, using a solid state detector.
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Affiliation(s)
- C Van Vlack
- Department of Physics, Queen's University, Kingston, ON K7L 3N6 Canada
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18
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Pavlov VV, Kalashnikova AM, Pisarev RV, Sänger I, Yakovlev DR, Bayer M. Magnetic-field-induced second-harmonic generation in semiconductor GaAs. PHYSICAL REVIEW LETTERS 2005; 94:157404. [PMID: 15904188 DOI: 10.1103/physrevlett.94.157404] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2004] [Indexed: 05/02/2023]
Abstract
We show that application of a magnetic field induces optical second-harmonic generation (SHG) in GaAs. This phenomenon arises from field-induced symmetry breaking causing new optical nonlinearities. A series of narrow SHG lines is observed in the spectral range from 1.52 to 1.77 eV that we attribute to Landau-level quantization of the band energy spectrum. The rotational anisotropy of the SHG signal distinctly differs from that of the electric-dipole approximation. Model calculations reveal that nonlinear magneto-optical spatial dispersion that comes together with the electric-dipole term is the dominant mechanism for this nonlinearity.
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Affiliation(s)
- V V Pavlov
- A. F. Ioffe Physical-Technical Institute, The Russian Academy of Sciences, 194021 St. Petersburg, Russia
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19
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Mücke OD, Tritschler T, Wegener M, Morgner U, Kärtner FX, Khitrova G, Gibbs HM. Carrier-wave Rabi flopping: role of the carrier-envelope phase. OPTICS LETTERS 2004; 29:2160-2162. [PMID: 15460889 DOI: 10.1364/ol.29.002160] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Recently, a dependence of Rabi flopping on the carrier-envelope phase of the exciting laser pulses was predicted theoretically [Phys. Rev. Lett. 89, 127401 (2002)] for excitation of a thin semiconductor film with intense few-cycle pulses. Here, we report corresponding experiments on 50-100-nm thin GaAs films excited with 5-fs pulses. We find a dependence on the carrier-envelope phase arising from the interference of sidebands from the fundamental or the third-harmonic Mollow triplet, respectively, with surface second-harmonic generation.
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Affiliation(s)
- Oliver D Mücke
- Institut für Angewandte Physik, Universität Karlsruhe (TH), Wolfgang-Gaede-Strasse 1, 76131 Karlsruhe, Germany
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