Lens coupler and magnetic field terahertz emission enhancement in InSb and InAs under 1.55-μm excitation
College
College of Science
Department/Unit
Physics
Document Type
Article
Source Title
Japanese Journal of Applied Physics
Volume
52
Issue
3 PART 1
Publication Date
3-1-2013
Abstract
Terahertz (THz) emission from InSb and InAs utilizing an MgO lens coupler in conjunction with an applied magnetic field is reported. A THz peak amplitude enhancement of 74 times in InSb compared to 26 times in InAs was observed. The considerable enhancement in InSb is attributed to its large Hall angle, small THz divergence and reduced total internal reflection. A corresponding emission shift to lower THz frequencies in both samples was observed due to the spectral dependence of the MgO lens' collection efficiency. This enhancement configuration is easily applicable in the design of a compact THz time-domain spectroscopy system. © 2013 The Japan Society of Applied Physics.
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Digitial Object Identifier (DOI)
10.7567/JJAP.52.032201
Recommended Citation
Nakajima, H., Que, C. T., Estacio, E. S., Yamamoto, K., & Tani, M. (2013). Lens coupler and magnetic field terahertz emission enhancement in InSb and InAs under 1.55-μm excitation. Japanese Journal of Applied Physics, 52 (3 PART 1) https://doi.org/10.7567/JJAP.52.032201
Keywords
Terahertz spectroscopy; Magnetic fields; Magnesium oxide; Refractive index
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