Accession Number:

AD1190040

Title:

Weyl Fermion Devices for Chipscale Communications

Descriptive Note:

[Technical Report, Final Report]

Corporate Author:

UNIVERSITY OF DELAWARE

Personal Author(s):

• Kolodzey, James

Report Date:

2022-11-30

Pagination or Media Count:

18

Abstract:

During the fourth year of this research program, investigations continued on multiterminal devices fabricated from semimetals with near-zero energy bandgap to study the possibility of Weyl fermion-effects on their operation and performance. With their exotic, topologically protected properties, Weyl fermion devices may produce electronic and optical circuits with ultra-high speeds and ultra-low power dissipationless drain, with operation at far-infrared wavelengths. Work continued on the Weyl semimetals MoTe2 and WTe2, as well as on low energy bandgap GeSn alloys, which were hoped to have Weyl-like behavior. The infrared photo response of multi-terminal devices was measured at wavelengths near 10 micrometers. It was found that these devices had interesting polarization-dependentphoto response and could distinguish the incident polarization including circular from horizontal and vertical linear polarization.

Descriptors:

• waveplates
• energy bands
• quantum cascade lasers
• air force research laboratories
• detectors
• circular polarization
• linear polarization
• long wavelengths
• measurement
• optical absorption
• optical properties
• optics
• optoelectronic devices
• power meters
• semiconductors
• air force
• charge carriers

Subject Categories:

Distribution Statement:

[A, Approved For Public Release]