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Title: Far-infrared detection using Weyl semimetals

Abstract

The generation of photocurrent in an ideal two-dimensional Dirac spectrum is symmetry forbidden. In sharp contrast, a three-dimensional Weyl semimetal can generically support significant photocurrent due to the combination of inversion symmetry breaking and finite tilts of the Weyl spectrum. To realize this photocurrent, a noncentrosymmetric Weyl semimetal is coupled to a pair of electrodes and illuminated with circularly polarized light without any voltage applied to the Weyl semimetal. The wavelength of the incident light can range over tens of microns and can be adjusted by doping the Weyl semimetal to change its chemical potential.

Inventors:
; ; ; ; ; ;
Issue Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1489040
Patent Number(s):
10090466
Application Number:
15/656,373
Assignee:
Massachusetts Institute of Technology (Cambridge, MA)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
DOE Contract Number:  
FG02-03ER46076; FG02-08ER46521
Resource Type:
Patent
Resource Relation:
Patent File Date: 2017 Jul 21
Country of Publication:
United States
Language:
English

Citation Formats

Chan, Ching-Kit, Lee, Patrick A., Lindner, Netanel, Refael, Gil, Ma, Qiong, Xu, Suyang, and Gedik, Nuh. Far-infrared detection using Weyl semimetals. United States: N. p., 2018. Web.
Chan, Ching-Kit, Lee, Patrick A., Lindner, Netanel, Refael, Gil, Ma, Qiong, Xu, Suyang, & Gedik, Nuh. Far-infrared detection using Weyl semimetals. United States.
Chan, Ching-Kit, Lee, Patrick A., Lindner, Netanel, Refael, Gil, Ma, Qiong, Xu, Suyang, and Gedik, Nuh. Tue . "Far-infrared detection using Weyl semimetals". United States. https://www.osti.gov/servlets/purl/1489040.
@article{osti_1489040,
title = {Far-infrared detection using Weyl semimetals},
author = {Chan, Ching-Kit and Lee, Patrick A. and Lindner, Netanel and Refael, Gil and Ma, Qiong and Xu, Suyang and Gedik, Nuh},
abstractNote = {The generation of photocurrent in an ideal two-dimensional Dirac spectrum is symmetry forbidden. In sharp contrast, a three-dimensional Weyl semimetal can generically support significant photocurrent due to the combination of inversion symmetry breaking and finite tilts of the Weyl spectrum. To realize this photocurrent, a noncentrosymmetric Weyl semimetal is coupled to a pair of electrodes and illuminated with circularly polarized light without any voltage applied to the Weyl semimetal. The wavelength of the incident light can range over tens of microns and can be adjusted by doping the Weyl semimetal to change its chemical potential.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {10}
}

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