Enhanced Coupling of Subterahertz Radiation with Semiconductor Periodic Slot Arrays

Ramakrishnan Parthasarathy, Alexei Bykhovski, Boris Gelmont, Tatiana Globus, Nathan Swami, and Dwight Woolard
Phys. Rev. Lett. 98, 153906 – Published 12 April 2007

Abstract

In this work, a theoretical study of the coupling of TM polarized subterahertz (THz) radiation with periodic semiconductor rectangular slot arrays was conducted, using InSb as an example. Simulation results showed that the structure with 412   μm thickness provides over a 20–30-fold increase in the electric field at slot edges in a nanosize region (500nm). The enhancement of the THz electromagnetic field extends across the slots and reaches peak values at the edges due to discontinuity effects. Because of the strong local electromagnetic field enhancement, the structure can potentially be used for the development of novel biophotonic sensors, leading to improved detection sensitivity.

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  • Received 3 November 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.153906

©2007 American Physical Society

Authors & Affiliations

Ramakrishnan Parthasarathy1, Alexei Bykhovski1, Boris Gelmont1,*, Tatiana Globus1, Nathan Swami1, and Dwight Woolard2

  • 1Department of Electrical & Computer Engineering, University of Virginia, Charlottesville, Virginia 22904, USA
  • 2U. S Army Research Laboratory, Army Research Office, Research Triangle Park, North Carolina 27709, USA

  • *Electronic address: gb7k@virginia.edu

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Issue

Vol. 98, Iss. 15 — 13 April 2007

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