Propagation Effects of THz Waves in InAs-Based Heterostructures

Title
Propagation Effects of THz Waves in InAs-Based Heterostructures
Authors
Muhammad IrfanJong-Hyuk YimDongju KimJae-Hyung Jang송진동Young-Dahl Jho
Keywords
InAs; THz; Phase shift; diffusion; photo-dember effect; interference
Issue Date
2014-07
Publisher
Journal of nanoscience and nanotechnology
Citation
VOL 14, NO 7, 5228-5231
Abstract
We have investigated THz radiation characteristics along different directions, either reflective or along lateral by using InAs-based heterostructures. Firstly, we demonstrate the phase shift with InAs layer thickness, revealing the change of dominant THz wave generation mechanism along both directions. Along the lateral direction, the time-domain signals in thin InAs epilayers showed an abrupt phase and amplitude change at certain time delays which suggest the interference between two rays at the photoconductive switch. This behavior was further substantiated by the multiple cavity modes in Fourier-transformed spectra and by the amplitude variation with excitation spot displacement.
URI
http://pubs.kist.re.kr/handle/201004/48514
ISSN
15334880
Appears in Collections:
KIST Publication > Article
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