Colloidal upconversion nanocrystals enable low-temperature-grown GaAs photoconductive switch operating at λ = 1.55 μm
| Autor: | Zhuoying Chen, Mahima Chaudhary, Hengyang Xiang, Charlotte Tripon-Canseliet |
|---|---|
| Přispěvatelé: | Laboratoire de Physique et d'Etude des Matériaux (UMR 8213) (LPEM), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Phase (waves) Bioengineering 02 engineering and technology 7. Clean energy 01 natural sciences Gallium arsenide chemistry.chemical_compound photoconductive switches 0103 physical sciences General Materials Science Electrical and Electronic Engineering [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics 010302 applied physics upconversion microwave switching nanotechnology business.industry Mechanical Engineering Photoconductivity General Chemistry photon upconversion colloidal nanocrystals [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Photon upconversion Power (physics) upconversion nanoparticles Semiconductor Nanocrystal chemistry Mechanics of Materials [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic Optoelectronics 0210 nano-technology business Microwave |
| Zdroj: | Nanotechnology Nanotechnology, Institute of Physics, 2021, 32 (45), pp.45LT01. ⟨10.1088/1361-6528/ac197c⟩ |
| ISSN: | 0957-4484 1361-6528 |
| DOI: | 10.1088/1361-6528/ac197c⟩ |
| Popis: | International audience; Microwave photoconductive switches, allowing an optical control on the magnitude and phase of the microwave signals to be transmitted, are important components for many optoelectronic applications. In recent years, there are significant demands to develop photoconductive switches functional in the shortwave -infrared spectrum window (e.g. λ = 1.3-1.55 µm) but most state-of-the-art semiconductors for photoconductive switches cannot achieve this goal. In this work, we propose a novel approach, by the use of solution-processed colloidal upconversion nanocrystals deposited directly onto low-temperature-grown gallium arsenide (LT-GaAs), to achieve microwave photoconductive switches functional at λ = 1.55 µm illumination. Hybrid upconversion Er 3+-doped NaYF 4 nanocrystal/LT-GaAs photoconductive switch was fabricated. Under a continuous wave (CW) λ = 1.55µm laser illumination (power density ∼ 12.9 mW/µm²), thanks to the upconversion energy transfer from the nanocrystals, a more than 2-fold larger value in decibel was measured for the ON/OFF ratio on the hybrid nanocrystal/LT-GaAs device by comparison to the control device without upconversion nanoparticles (UCNPs). A maximum ON/OFF ratio reaching 20.6 dB was measured on the nanocrystal/LT-GaAs hybrid device at an input signal frequency of 20 MHz. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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