Tunable terahertz plasmonic lenses based on semiconductor microslits

A theoretical investigation of tunable terahertz (THz) plasmonic lenses on the basis of InSb microslits is presented.First, it is demonstrated that the surface plasmon polaritons propagating in an InSb microslit array with variant slit widths would face different phase retardations, which, by design...

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Bibliographic Details
Published in:Microwave and optical technology letters 2010-04, Vol.52 (4), p.979-981
Main Authors: Chen, Meng-Ku, Chang, Yun-Ching, Yang, Chia-En, Guo, Yaohui, Mazurowski, John, Yin, Stuart, Ruffin, Paul, Brantley, Christina, Edwards, Eugene, Luo, Claire
Format: Article
Language:English
Subjects:
Arrays
Indium antimonides
Intermetallics
Lenses
Plasmonics
semiconductor microslits
Semiconductors
Slits
terahertz
Three dimensional
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Summary:A theoretical investigation of tunable terahertz (THz) plasmonic lenses on the basis of InSb microslits is presented.First, it is demonstrated that the surface plasmon polaritons propagating in an InSb microslit array with variant slit widths would face different phase retardations, which, by design, can produce a focusing wavefront. The extraordinary transmission of THz radiation through the InSb subwavelength slit array is also observed. Second, a method for tuning the focal lengths of InSb plasmonic lenses is proposed. The results in this article provide a potential way to realize a tunable terahertz plasmonic lens with high transmission, which can be applied to the application of rapid 3D z‐scanning based THz imaging and sensing. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:979–981, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25079
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.25079