Pyroelectric photogating effect on graphene-based long-wavelength infrared photodetectors at room temperature

Shoichiro Fukushima; Masaaki Shimatani; Shinpei Ogawa

doi:10.1117/12.2616843

27 May 2022 Pyroelectric photogating effect on graphene-based long-wavelength infrared photodetectors at room temperature

Shoichiro Fukushima, Masaaki Shimatani, Shinpei Ogawa

Author Affiliations +

Proceedings Volume 12107, Infrared Technology and Applications XLVIII; 121071B (2022) https://doi.org/10.1117/12.2616843
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

In this study, room-temperature long-wavelength infrared (LWIR) graphene photodetectors using pyroelectric photosensitizers are demonstrated. The devices comprise graphene-based field-effect transistors with lithium niobate as a pyroelectric photosensitizer. To enhance the photodetector performance, we studied the influence of photosensitizer thickness and ferroelectric polarization direction on the pyroelectric photogating effect. Modulation of the gate current indicates that the IR photoresponse is considerably amplified by thick photosensitizers in which dielectric polarization occurs in the direction perpendicular to the graphene channel. The results will contribute to the development of high-performance graphene LWIR image sensors.

Conference Presentation

Citation Download Citation

Shoichiro Fukushima, Masaaki Shimatani, and Shinpei Ogawa "Pyroelectric photogating effect on graphene-based long-wavelength infrared photodetectors at room temperature", Proc. SPIE 12107, Infrared Technology and Applications XLVIII, 121071B (27 May 2022); https://doi.org/10.1117/12.2616843

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available