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Title: Single-crystalline germanium nanomembrane photodetectors on foreign nanocavities

Abstract

Miniaturization of optoelectronic devices offers tremendous performance gain. As the volume of photoactive material decreases, optoelectronic performance improves, including the operation speed, the signal-to-noise ratio, and the internal quantum efficiency. Over the past decades, researchers have managed to reduce the volume of photoactive materials in solar cells and photodetectors by orders of magnitude. However, two issues arise when one continues to thin down the photoactive layers to the nanometer scale (for example, <50 nm). First, light-matter interaction becomes weak, resulting in incomplete photon absorption and low quantum efficiency. Second, it is difficult to obtain ultrathin materials with single-crystalline quality. We introduce a method to overcome these two challenges simultaneously. It uses conventional bulk semiconductor wafers, such as Si, Ge, and GaAs, to realize single-crystalline films on foreign substrates that are designed for enhanced light-matter interaction. We use a high-yield and high-throughput method to demonstrate nanometer-thin photodetectors with significantly enhanced light absorption based on nanocavity interference mechanism. As a result, these single-crystalline nanomembrane photodetectors also exhibit unique optoelectronic properties, such as the strong field effect and spectral selectivity.

Authors:
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [3];  [1];  [4];  [2]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Univ. at Buffalo, State Univ. of New York, Buffalo, NY (United States)
  3. Yale Univ., New Haven, CT (United States)
  4. (Jack) [Univ. of Wisconsin, Madison, WI (United States)
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1369463
Grant/Contract Number:  
NA0002915
Resource Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 3; Journal Issue: 7; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; photodetector; semiconductor nanomembrane

Citation Formats

Xia, Zhenyang, Song, Haomin, Kim, Munho, Zhou, Ming, Chang, Tzu -Hsuan, Liu, Dong, Yin, Xin, Xiong, Kanglin, Mi, Hongyi, Wang, Xudong, Xia, Fengnian, Yu, Zongfu, Ma, Zhenqiang, and Gan, Qiaoqiang. Single-crystalline germanium nanomembrane photodetectors on foreign nanocavities. United States: N. p., 2017. Web. doi:10.1126/sciadv.1602783.
Xia, Zhenyang, Song, Haomin, Kim, Munho, Zhou, Ming, Chang, Tzu -Hsuan, Liu, Dong, Yin, Xin, Xiong, Kanglin, Mi, Hongyi, Wang, Xudong, Xia, Fengnian, Yu, Zongfu, Ma, Zhenqiang, & Gan, Qiaoqiang. Single-crystalline germanium nanomembrane photodetectors on foreign nanocavities. United States. doi:10.1126/sciadv.1602783.
Xia, Zhenyang, Song, Haomin, Kim, Munho, Zhou, Ming, Chang, Tzu -Hsuan, Liu, Dong, Yin, Xin, Xiong, Kanglin, Mi, Hongyi, Wang, Xudong, Xia, Fengnian, Yu, Zongfu, Ma, Zhenqiang, and Gan, Qiaoqiang. Fri . "Single-crystalline germanium nanomembrane photodetectors on foreign nanocavities". United States. doi:10.1126/sciadv.1602783. https://www.osti.gov/servlets/purl/1369463.
@article{osti_1369463,
title = {Single-crystalline germanium nanomembrane photodetectors on foreign nanocavities},
author = {Xia, Zhenyang and Song, Haomin and Kim, Munho and Zhou, Ming and Chang, Tzu -Hsuan and Liu, Dong and Yin, Xin and Xiong, Kanglin and Mi, Hongyi and Wang, Xudong and Xia, Fengnian and Yu, Zongfu and Ma, Zhenqiang and Gan, Qiaoqiang},
abstractNote = {Miniaturization of optoelectronic devices offers tremendous performance gain. As the volume of photoactive material decreases, optoelectronic performance improves, including the operation speed, the signal-to-noise ratio, and the internal quantum efficiency. Over the past decades, researchers have managed to reduce the volume of photoactive materials in solar cells and photodetectors by orders of magnitude. However, two issues arise when one continues to thin down the photoactive layers to the nanometer scale (for example, <50 nm). First, light-matter interaction becomes weak, resulting in incomplete photon absorption and low quantum efficiency. Second, it is difficult to obtain ultrathin materials with single-crystalline quality. We introduce a method to overcome these two challenges simultaneously. It uses conventional bulk semiconductor wafers, such as Si, Ge, and GaAs, to realize single-crystalline films on foreign substrates that are designed for enhanced light-matter interaction. We use a high-yield and high-throughput method to demonstrate nanometer-thin photodetectors with significantly enhanced light absorption based on nanocavity interference mechanism. As a result, these single-crystalline nanomembrane photodetectors also exhibit unique optoelectronic properties, such as the strong field effect and spectral selectivity.},
doi = {10.1126/sciadv.1602783},
journal = {Science Advances},
number = 7,
volume = 3,
place = {United States},
year = {2017},
month = {7}
}

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