Ultrasensitive Mid-wavelength Infrared Photodetection Based on a Single InAs Nanowire
| Autor: | Jianlu Wang, Hai Huang, Xiaomei Yao, Weida Hu, Chennupati Jagadish, Hark Hoe Tan, Pingping Chen, Xiaohao Zhou, Xu Zhang, Lan Fu, Ziyuan Li, Chen Zhou, Wei Lu, Xutao Zhang, Jin Zou |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Infrared General Engineering Nanowire General Physics and Astronomy Photodetector 02 engineering and technology Photodetection 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity Franz–Keldysh effect 0104 chemical sciences Responsivity Wavelength Optoelectronics General Materials Science 0210 nano-technology business |
| Zdroj: | ACS Nano. 13:3492-3499 |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | One-dimensional InAs nanowire (NW)-based photodetectors have been widely studied due to their potential application in mid-wavelength infrared (MWIR) photon detection. However, the limited performance and complicated photoresponse mechanism of InAs NW-based photodetectors have held back their true potential for real application. In this study, we developed ferroelectric polymer P(VDF-TrFE)-coated InAs NW-based photodetectors and demonstrated that the electrostatic field caused by polarized ferroelectric materials modifies the surface electron–hole distribution as well as the band structure of InAs NWs, resulting in ultrasensitive photoresponse and a wide photodetection spectral range. Our single InAs NW photodetectors exhibit a high responsivity (R) of 1.6 × 104 A W–1 as well as a corresponding detectivity (D*) of 1.4 × 1012 cm·Hz1/2 W–1 at a light wavelength of 3.5 μm without an applied gate voltage, ∼3–4 orders higher than the maximum value of photoresponsivity reported or commercially used MWIR photode... |
| Databáze: | OpenAIRE |
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