Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session F56: Graphene: Bandstructure Engineering, Device Physics
8:00 AM–10:48 AM,
Tuesday, March 15, 2022
Room: Hyatt Regency Hotel -Burnham
Sponsoring Unit: DCMP
Chair: Gideon Oyibo
Abstract: F56.00007 : Graphene – Narrow Bandgap Semiconductor Heterostructures for Mid-Infrared Photodetection*
9:12 AM–9:24 AM
Ho X Vinh
Michael P Cooney
(NASA Langley Research Center)
Vinh Q Nguyen
Graphene-based semiconductor heterostructures have attracted attention for realizing optoelectronic devices, especially for photodetection from the deep-UV to the mid-infrared region. These photodetectors utilize graphene as a photoconductive channel to circulate photocurrent, fabricated on top of a narrow semiconductor substrate that will use a phenomenon known as photogating to obtain a high photoconductive gain. While a common material used in the substrate is silicon (Si), indium antimonide (InSb) offers a promising substitute, as it has a direct and narrow bandgap semiconductor. These detectors show high photo-response to the mid-infrared incident light at the wavelength of 10 µm. The work provides a method for achieving high-performance optoelectronics operating in the mid-infrared region at room temperature.
*The authors gratefully acknowledge the financial support of this effort by the Earth Science Technology Office (ESTO), NASA.
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