Ultra-High Mobility and Temperature-Dependent Carrier Dynamics in Narrow-Gap Hg1-xCdxTe Films

Nils B. Refvik, David N. Purschke, Wenwu Pan, Charles E. Jensen, Howe R.J. Simpson, Wen Lei, Renjie Gu, Jarek Antoszewski, Gilberto A. Umana-Membreno, Lorenzo Faraone, Frank A. Hegmann

Research output: Chapter in Book/Conference paperConference paperpeer-review

3 Citations (Scopus)

Abstract

Mercury cadmium telluride (MCT) is a well-established semiconductor alloy with a widely tunable band gap in the infrared. However, there have been no comprehensive studies on its ultrafast THz photoconductivity dynamics. We report on ultra-high carrier mobilities (6 × 105cm2/Vs) and long lifetimes in long-wave infrared MCT films as measured by time-resolved terahertz spectroscopy (TRTS). A crossover to negative terahertz photoconductivity at higher frequencies is also observed. Our results suggest that TRTS could find industrial application as a non-contact probe of MCT films for infrared photodetectors and imaging arrays.

Original languageEnglish
Title of host publicationIRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISBN (Electronic)9781728194271
DOIs
Publication statusPublished - 2022
Event47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022 - Delft, Netherlands
Duration: 28 Aug 20222 Sept 2022

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Volume2022-August
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Conference

Conference47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022
Country/TerritoryNetherlands
CityDelft
Period28/08/222/09/22

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