Terahertz detectors based on all-dielectric photoconductive metasurfaces

Oleg Mitrofanov; Thomas Siday; Polina P. Vabishchevich; Lucy Hale; Charles Thomas Harris; Ting Shan Luk; John L. Reno; Igal Brener

doi:10.1117/12.2529393

6 September 2019 Terahertz detectors based on all-dielectric photoconductive metasurfaces

Oleg Mitrofanov, Thomas Siday, Polina P. Vabishchevich, Lucy Hale, Charles Thomas Harris, Ting Shan Luk, John L. Reno, Igal Brener

Author Affiliations +

Proceedings Volume 11124, Terahertz Emitters, Receivers, and Applications X; 1112410 (2019) https://doi.org/10.1117/12.2529393
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

Performance of terahertz (THz) photoconductive devices, including detectors and emitters, has been improved recently by means of plasmonic nanoantennae and gratings. However, plasmonic nanostructures introduce Ohmic losses, which limit gains in device performance. In this presentation, we discuss an alternative approach, which eliminates the problem of Ohmic losses. We use all-dielectric photoconductive metasurfaces as the active region in THz switches to improve their efficiency. In particular, we discuss two approaches to realize perfect optical absorption in a thin photoconductive layer without introducing metallic elements. In addition to providing perfect optical absorption, the photoconductive channel based on all-dielectric metasurface allows us to engineer desired electrical properties, specifically, fast and efficient conductivity switching with very high contrast. This approach thus promises a new generation of sensitive and efficient THz photoconductive detectors. Here we demonstrate and discuss performance of two practical THz photoconductive detectors with integrated all-dielectric metasurfaces.

Conference Presentation

Citation Download Citation

Oleg Mitrofanov, Thomas Siday, Polina P. Vabishchevich, Lucy Hale, Charles Thomas Harris, Ting Shan Luk, John L. Reno, and Igal Brener "Terahertz detectors based on all-dielectric photoconductive metasurfaces", Proc. SPIE 11124, Terahertz Emitters, Receivers, and Applications X, 1112410 (6 September 2019); https://doi.org/10.1117/12.2529393

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