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Browse Journals & Magazines > Applied Physics Letters ...> Volume:75 Issue:24 Help

Sub-THz spectroscopic system using a multimode laser diode and photoconductive antenna

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3 Author(s)
Morikawa, O. ; Research Center for Superconducting Materials and Electronics, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan ; Tonouchi, M. ; Hangyo, M.

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A system for measuring transmittance of electromagnetic waves in the sub-THz region is proposed. The electromagnetic radiation is generated by the excitation of a photoconductive antenna with a commercially available multimode laser diode. The spectral coverage of the radiation is increased by defocusing the light spot on the photoconductive antenna. Transmitted radiation is detected by a hot-electron bolometer through a Martin–Puplett-type interferometer. Transmittance is measured for n-type Si wafers with various doping levels. The carrier densities calculated from the transmittance agree well with those obtained from the dc conductivity measurement. © 1999 American Institute of Physics.

Published in:
Applied Physics Letters  (Volume:75 ,  Issue: 24 )

Date of Publication: Dec 1999

Page(s):
3772 - 3774
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.125451
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Dec 1999

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