Relationship between phase and generation mechanisms of THz waves in InAs

Title
Relationship between phase and generation mechanisms of THz waves in InAs
Authors
H. Jeong신상훈김수연송진동S.B. ChoiD.S. LeeJ. LeeY.D. Jho
Keywords
InAs; THz; Terahertz; Phase shift; Diffusion; Photo-Dember effect
Issue Date
2012-05
Publisher
Current applied physics
Citation
VOL 12, NO 3, 668-672
Abstract
We investigated the thickness-dependent characteristics of THz waves from InAs epilayers whose thickness ranges from 0.01 to 1.74 mm. The amplitude showed monotonic increments up to 0.9 mm, followed by a saturation at 1.74 mm. Interestingly, the phase of THz waves was reversed around absorption depth and used to identify the transient dipole direction based on simulated band diagram. We could further distinguish dominant THz wave generation mechanisms, associated with the phase information.
URI
http://pubs.kist.re.kr/handle/201004/42082
ISSN
15671739
Appears in Collections:
KIST Publication > Article
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