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Bautista G, Mäkitalo J, Chen Y, Dhaka V, Grasso M, Karvonen L, Jiang H, Huttunen MJ, Huhtio T, Lipsanen H, Kauranen M. Second-harmonic generation imaging of semiconductor nanowires with focused vector beams. NANO LETTERS 2015; 15:1564-1569. [PMID: 25651302 DOI: 10.1021/nl503984b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We use second-harmonic generation (SHG) with focused vector beams to investigate individual vertically aligned GaAs nanowires. Our results provide direct evidence that SHG from oriented nanowires is mainly driven by the longitudinal field along the nanowire growth axis. Consequently, focused radial polarization provides a superior tool to characterize such nanowires compared to linear polarization, also allowing this possibility in the native growth environment. We model our experiments by describing the SHG process for zinc-blende structure and dipolar bulk nonlinearity.
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Affiliation(s)
- Godofredo Bautista
- Department of Physics, Tampere University of Technology , P.O. Box 692, FI-33101 Tampere, Finland
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Bergfeld S, Braunschweig B, Daum W. Nonlinear optical spectroscopy of suboxides at oxidized Si(111) interfaces. PHYSICAL REVIEW LETTERS 2004; 93:097402. [PMID: 15447137 DOI: 10.1103/physrevlett.93.097402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2003] [Indexed: 05/24/2023]
Abstract
Native oxidation of the Si(111)(1 x 1)H surface causes the appearance and disappearance of second-harmonic generation (SHG) resonances related to specific bonding configurations of Si atoms at the interface. Resonances at 3.52 eV two-photon energy observed in p-polarized SHG spectra are indicative of a Si suboxide configuration present in a partially oxidized Si surface bilayer. Similar resonances are observed in spectra of thermally oxidized Si(111) and point to Si2+ suboxide states at the buried interface.
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Affiliation(s)
- S Bergfeld
- Institut für Schichten und Grenzflächen (ISG 3), Forschungszentrum Jülich, D-52428 Jülich, Germany
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Peterson KA, Kane DJ. Electric-field-induced second-harmonic generation in GaN devices. OPTICS LETTERS 2001; 26:438-440. [PMID: 18040346 DOI: 10.1364/ol.26.000438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Electric-field-induced second-harmonic generation is used to detect electric fields in a GaN UV Schottky photodiode and in a GaN light-emitting diode. The second-harmonic signal is measured as a function of bias voltage and incident laser power. This technique is sensitive to small applied voltages and can be used to track electronic waveforms. The photocurrent generated by this technique is found to be less than 100 pA when the fundamental and second-harmonic frequencies are both below the device bandgap.
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Ahn H, Wu CL, Gwo S, Wei CM, Chou YC. Structure determination of the Si3N4/Si(111)- (8 x 8) surface: a combined study of Kikuchi electron holography, scanning tunneling microscopy, and ab initio calculations. PHYSICAL REVIEW LETTERS 2001; 86:2818-2821. [PMID: 11290047 DOI: 10.1103/physrevlett.86.2818] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2000] [Indexed: 05/23/2023]
Abstract
A comprehensive atomic model for the reconstructed surface of Si3N4 thin layer grown on Si(111) is presented. Kikuchi electron holography images clearly show the existence of adatoms on the Si3N4(0001)/Si(111)-(8x8) surface. Compared with the ab initio calculations, more than 30 symmetry-inequivalent atomic pairs in the outmost layers are successfully identified. Scanning tunneling microscopy (STM) images show diamond-shaped unit cells and nine adatoms in each cell. High-resolution STM images reveal extra features and are in good agreement with the partial charge density distribution obtained from total-energy calculations.
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Affiliation(s)
- H Ahn
- Department of Physics, National Tsing-Hua University, Hsinchu, Taiwan 300, Republic of China
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Downer MC, Mendoza BS, Gavrilenko VI. Optical second harmonic spectroscopy of semiconductor surfaces: advances in microscopic understanding. SURF INTERFACE ANAL 2001. [DOI: 10.1002/sia.1133] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Mitchell SA, Boukherroub R, Anderson S. Second Harmonic Generation at Chemically Modified Si(111) Surfaces. J Phys Chem B 2000. [DOI: 10.1021/jp000450d] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. A. Mitchell
- Steacie Institute for Molecular Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6
| | - R. Boukherroub
- Steacie Institute for Molecular Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6
| | - S. Anderson
- Steacie Institute for Molecular Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6
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Bachlechner ME, Omeltchenko A, Nakano A, Kalia RK, Vashishta P, Ebbsjo I, Madhukar A. Dislocation emission at the Silicon/Silicon nitride interface: A million atom molecular dynamics simulation on parallel computers. PHYSICAL REVIEW LETTERS 2000; 84:322-325. [PMID: 11015901 DOI: 10.1103/physrevlett.84.322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/1999] [Indexed: 05/23/2023]
Abstract
Mechanical behavior of the Si(111)/Si(3)N4(0001) interface is studied using million atom molecular dynamics simulations. At a critical value of applied strain parallel to the interface, a crack forms on the silicon nitride surface and moves toward the interface. The crack does not propagate into the silicon substrate; instead, dislocations are emitted when the crack reaches the interface. The dislocation loop propagates in the (1; 1;1) plane of the silicon substrate with a speed of 500 (+/-100) m/s. Time evolution of the dislocation emission and nature of defects is studied.
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Affiliation(s)
- ME Bachlechner
- Concurrent Computing Laboratory for Materials Simulations, Department of Physics & Astronomy and Department of Computer Science, Louisiana State University, Baton Rouge, Louisiana 70803-4001, USA
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Chang YM, Xu L, Tom HW. Coherent phonon spectroscopy of GaAs surfaces using time-resolved second-harmonic generation. Chem Phys 2000. [DOI: 10.1016/s0301-0104(99)00306-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Yagi I, Nakabayashi S, Uosaki K. Excitation Wavelength Dependent Three-Wave Mixing at a CO-Covered Platinum Electrode. J Phys Chem B 1997. [DOI: 10.1021/jp964010r] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Ichizo Yagi
- Physical Chemistry Laboratory, Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060, Japan
| | - Seiichiro Nakabayashi
- Physical Chemistry Laboratory, Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060, Japan
| | - Kohei Uosaki
- Physical Chemistry Laboratory, Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060, Japan
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Bloch J, Mihaychuk JG. Electron Photoinjection from Silicon to Ultrathin SiO2 Films via Ambient Oxygen. PHYSICAL REVIEW LETTERS 1996; 77:920-923. [PMID: 10062940 DOI: 10.1103/physrevlett.77.920] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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12
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Aktsipetrov OA, Fedyanin AA, Mishina ED, Rubtsov AN, Devillers MA, Rasing T. dc-electric-field-induced second-harmonic generation in Si(111)-SiO2-Cr metal-oxide-semiconductor structures. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:1825-1832. [PMID: 9986030 DOI: 10.1103/physrevb.54.1825] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ekerdt JG, Sun YM, Szabo A, Szulczewski GJ, White JM. Role of Surface Chemistry in Semiconductor Thin Film Processing. Chem Rev 1996; 96:1499-1518. [PMID: 11848800 DOI: 10.1021/cr950236z] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. G. Ekerdt
- Departments of Chemical Engineering and of Chemistry and Biochemistry, Center for Materials Chemistry, and Center for Synthesis, Growth, and Analysis of Electronic Materials, University of Texas at Austin, Austin, Texas 78712
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Dadap JI, Hu XF, Anderson MH, Downer MC, Lowell JK, Aktsipetrov OA. Optical second-harmonic electroreflectance spectroscopy of a Si(001) metal-oxide-semiconductor structure. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:R7607-R7609. [PMID: 9982278 DOI: 10.1103/physrevb.53.r7607] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Mihaychuk JG, Bloch J, Liu Y, van Driel HM. Time-dependent second-harmonic generation from the Si-SiO(2) interface induced by charge transfer. OPTICS LETTERS 1995; 20:2063-2065. [PMID: 19862251 DOI: 10.1364/ol.20.002063] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We have observed that the second-harmonic signal generated from oxidized Si(001) varies on a time scale of several seconds in experiments involving a fundamental beam of lambda = 770 nm, 110-fs pulses at 76 MHz. We suggest that the temporal behavior arises from absorption of weak (<100-fW average power) third-harmonic light generated in air or in the sample, inducing charge transfer across the Si-SiO(2) interface and trapping in the oxide layer. Detrapping has been determined to take several minutes.
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Lüpke G, Meyer C, Ohlhoff C, Kurz H, Lehmann S, Marowsky G. Optical second-harmonic generation as a probe of electric-field-induced perturbation of centrosymmetric media. OPTICS LETTERS 1995; 20:1997-1999. [PMID: 19862229 DOI: 10.1364/ol.20.001997] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Polarization-selective optical second-harmonic generation (SHG) is applied to monitor nonuniform polarization distributions in centrosymmetric media modulated by an external dc electric field. Two different systems are investigated: first, optical SHG from a Au-Si(100) Schottky Barrier is shown to be a direct probe of the electric field polarity near such a metal-semiconductor interface. Second, a poled polymer exhibits a strong anisotropic SHG signal under normal incidence, indicating a nonuniform field enhancement at the edges of the poling electrode. The results demonstrate the sensitivity of SHG to small symmetry perturbations. Consequences for device applications are discussed.
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