1
|
Konnikova MR, Khomenko MD, Tverjanovich AS, Bereznev S, Mankova AA, Parashchuk OD, Vasilevsky IS, Ozheredov IA, Shkurinov AP, Bychkov EA. GeTe 2 Phase Change Material for Terahertz Devices with Reconfigurable Functionalities Using Optical Activation. ACS APPLIED MATERIALS & INTERFACES 2023; 15:9638-9648. [PMID: 36780579 DOI: 10.1021/acsami.2c21678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The phenomenon of phase change transition has been a fascinating research subject over decades due to a possibility of dynamically controlled materials properties, allowing the creation of optical devices with unique features. The present paper unravels the optical characteristics and terahertz (THz) dielectric permittivity of a novel phase change material (PCM), GeTe2, prepared by pulsed laser deposition (PLD) and their remarkable contrast in crystalline and amorphous states, in particular, a difference of 7 orders of magnitude in conductivity. The THz spectra were analyzed using the harmonic oscillator and Drude term. Using GeTe2 PLD films, we designed and prepared a THz metasurface in the form of periodic structure and revealed a possibility of tuning the THz resonance either by a thermal control or light-induced crystallization response, thus achieving the dynamic and tunable functionality of the metastructure. We propose controlling the state of metasurface by observing the intensity characteristics of the Raman peak of 155 cm-1. Density functional theory (DFT) modeling demonstrates that in the process of crystallization the mode intensity of 155 cm-1 assigned to Te-Te stretching in amorphous chain fragments decreases and disappears at full crystallization.
Collapse
Affiliation(s)
- Maria R Konnikova
- Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia
- ILIT RAS-Branch of the FSRC "Crystallography and Photonics", RAS, 140700 Shatura, Moscow Region, Russia
- Laboratory of Biophotonics, National Research Tomsk State University, 634050, Tomsk, Russia
| | - Maxim D Khomenko
- ILIT RAS-Branch of the FSRC "Crystallography and Photonics", RAS, 140700 Shatura, Moscow Region, Russia
| | - Andrey S Tverjanovich
- Institute of Chemistry, St. Petersburg State University, 198504 St. Petersburg, Russia
| | - Sergei Bereznev
- Department of Materials and Environmental Technology, Tallinn University of Technology, 19086 Tallinn, Estonia
| | - Anna A Mankova
- Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia
| | - Olga D Parashchuk
- Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia
| | - Ivan S Vasilevsky
- National Research Nuclear University MEPhI, Kashirskoe sh. 31, 115409 Moscow, Russia
| | - Ilya A Ozheredov
- Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia
- ILIT RAS-Branch of the FSRC "Crystallography and Photonics", RAS, 140700 Shatura, Moscow Region, Russia
| | - Alexander P Shkurinov
- Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia
- Laboratory of Biophotonics, National Research Tomsk State University, 634050, Tomsk, Russia
| | - Eugene A Bychkov
- ILIT RAS-Branch of the FSRC "Crystallography and Photonics", RAS, 140700 Shatura, Moscow Region, Russia
- Laboratoire de Physico-Chimie de l'Atmosphère, Université du Littoral Côte d'Opale, 59140 Dunkerque, France
| |
Collapse
|
2
|
Design and Optimization of All-Dielectric Fluorescence Enhancing Metasurfaces: Towards Advanced Metasurface-Assisted Optrodes. BIOSENSORS 2022; 12:bios12050264. [PMID: 35624565 PMCID: PMC9138857 DOI: 10.3390/bios12050264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/15/2022] [Accepted: 04/19/2022] [Indexed: 11/16/2022]
Abstract
The need for miniaturized biological sensors which can be easily integrated into medical needles and catheters for in vivo liquid biopsies with ever-increasing performances has stimulated the interest of researchers in lab-on-fiber (LOF) technology. LOF devices arise from the integration of functional materials at the nanoscale on the tip of optical fibers, thus endowing a simple optical fiber with advanced functionalities and enabling the realization of high-performance LOF biological sensors. Consequently, in 2017, we demonstrated the first optical fiber meta-tip (OFMT), consisting of the integration of plasmonic metasurfaces (MSs) on the optical fiber end-face which represented a major breakthrough along the LOF technology roadmap. Successively, we demonstrated that label-free biological sensors based on the plasmonic OFMT are able to largely overwhelm the performance of a standard plasmonic LOF sensor, in view of the extraordinary light manipulation capabilities of plasmonic array exploiting phase gradients. To further improve the overall sensitivity, a labelled sensing strategy is here suggested. To this end, we envision the possibility to realize a novel class of labelled LOF optrodes based on OFMT, where an all-dielectric MS, designed to enhance the fluorescence emission by a labelled target molecule, is integrated on the end-face of a multimode fiber (MMF). We present a numerical environment to compute the fluorescence enhancement factor collected by the MMF, when on its tip a Silicon MS is laid, consisting of an array of cylindrical nanoantennas, or of dimers or trimers of cylindrical nanoantennas. According to the numerical results, a suitable design of the dielectric MS allows for a fluorescence enhancement up to three orders of magnitudes. Moreover, a feasibility study is carried out to verify the possibility to fabricate the designed MSs on the termination of multimode optical fibers using electron beam lithography followed by reactive ion etching. Finally, we analyze a real application scenario in the field of biosensing and evaluate the degradation in the fluorescence enhancement performances, taking into account the experimental conditions. The present work, thus, provides the main guidelines for the design and development of advanced LOF devices based on the fluorescence enhancement for labelled biosensing applications.
Collapse
|
3
|
Integrated Photodetectors Based on Group IV and Colloidal Semiconductors: Current State of Affairs. MICROMACHINES 2020; 11:mi11090842. [PMID: 32911711 PMCID: PMC7569792 DOI: 10.3390/mi11090842] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/03/2020] [Accepted: 09/05/2020] [Indexed: 11/16/2022]
Abstract
With the aim to take advantage from the existing technologies in microelectronics, photodetectors should be realized with materials compatible with them ensuring, at the same time, good performance. Although great efforts are made to search for new materials that can enhance performance, photodetector (PD) based on them results often expensive and difficult to integrate with standard technologies for microelectronics. For this reason, the group IV semiconductors, which are currently the main materials for electronic and optoelectronic devices fabrication, are here reviewed for their applications in light sensing. Moreover, as new materials compatible with existing manufacturing technologies, PD based on colloidal semiconductor are revised. This work is particularly focused on developments in this area over the past 5-10 years, thus drawing a line for future research.
Collapse
|
4
|
Lin YS, Dai J, Zeng Z, Yang BR. Metasurface Color Filters Using Aluminum and Lithium Niobate Configurations. NANOSCALE RESEARCH LETTERS 2020; 15:77. [PMID: 32274605 PMCID: PMC7145885 DOI: 10.1186/s11671-020-03310-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 03/25/2020] [Indexed: 05/03/2023]
Abstract
Two designs of metasurface color filters (MCFs) using aluminum and lithium niobate (LN) configurations are proposed and numerically studied. They are denoted as tunable aluminum metasurface (TAM) and tunable LN metasurface (TLNM), respectively. The configurations of MCFs are composed of suspended metasurfaces above aluminum mirror layers to form a Fabry-Perot (F-P) resonator. The resonances of TAM and TLNM are red-shifted with tuning ranges of 100 nm and 111 nm, respectively, by changing the gap between the bottom mirror layer and top metasurface. Furthermore, the proposed devices exhibit perfect absorption with ultra-narrow bandwidth spanning the whole visible spectral range by composing the corresponding geometrical parameters. To increase the flexibility and applicability of proposed devices, TAM exhibits high sensitivity of 481.5 nm/RIU and TLNM exhibits high figure-of-merit (FOM) of 97.5 when the devices are exposed in surrounding environment with different refraction indexes. The adoption of LN-based metasurface can enhance FWHM and FOM values as 10-fold and 7-fold compared to those of Al-based metasurface, which greatly improves the optical performance and exhibits great potential in sensing applications. These proposed designs provide an effective approach for tunable high-efficiency color filters and sensors by using LN-based metamaterial.
Collapse
Affiliation(s)
- Yu-Sheng Lin
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, China.
| | - Jie Dai
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Zhuoyu Zeng
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Bo-Ru Yang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, China.
| |
Collapse
|
5
|
Petronijevic E, Centini M, Cesca T, Mattei G, Bovino FA, Sibilia C. Control of Au nanoantenna emission enhancement of magnetic dipolar emitters by means of VO 2 phase change layers. OPTICS EXPRESS 2019; 27:24260-24273. [PMID: 31510318 DOI: 10.1364/oe.27.024260] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/08/2019] [Indexed: 06/10/2023]
Abstract
Active, ultra-fast external control of the emission properties at the nanoscale is of great interest for chip-scale, tunable and efficient nanophotonics. Here we investigated the emission control of dipolar emitters coupled to a nanostructure made of an Au nanoantenna, and a thin vanadium dioxide (VO2) layer that changes from semiconductor to metallic state. If the emitters are sandwiched between the nanoantenna and the VO2 layer, the enhancement and/or suppression of the nanostructure's magnetic dipole resonance enabled by the phase change behavior of the VO2 layer can provide a high contrast ratio of the emission efficiency. We show that a single nanoantenna can provide high magnetic field in the emission layer when VO2 is metallic, leading to high emission of the magnetic dipoles; this emission is then lowered when VO2 switches back to semiconductor. We finally optimized the contrast ratio by considering different orientation, distribution and nature of the dipoles, as well as the influence of a periodic Au nanoantenna pattern. As an example of a possible application, the design is optimized for the active control of an Er3+ doped SiO2 emission layer. The combination of the emission efficiency increase due to the plasmonic nanoantenna resonances and the ultra-fast contrast control due to the phase-changing medium can have important applications in tunable efficient light sources and their nanoscale integration.
Collapse
|