Terahertz emission from a double asymmetric quantum well p-i-n structure

College

College of Science

Department/Unit

Physics

Document Type

Archival Material/Manuscript

Publication Date

2010

Abstract

Terahertz time-domain spectroscopy was performed on a double asymmetric quantum wells p-i-n structure. Part of the p-layer of the sample was etched to ensure that the THz emission is from the active region. THz emission was detected on both unetched and etched samples. The THz signal was improved after removing the GaAs cap layer which in effect minimized the free-carrier THz absorption. Optical characterizations were also performed to verify the presence of quantum wells in the sample which also confirms the amplification of the THz emission due to the enhanced quantum well absorption.

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Disciplines

Physics

Keywords

Terahertz spectroscopy; Quantum wells

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