We have investigated the propagation of terahertz (THz) surface plasmon polaritons (SPPs) on gratings formed by grooves structured in silicon wafers. These gratings exhibit a stop gap where SPPs are Bragg scattered. We observe a strong effect of the groove depth on the characteristics of the stop gap. To quantify the scattering strength of these structures we obtain the SPP attenuation length by measuring the transmission as a function of the number of grooves. We also determine the effective refractive index of the Bragg gratings using two different approaches: by measuring the transmittance through the gratings at different angles of incidence and from the phase of the transmitted THz pulses. The two approaches give results in good agreement.
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15 January 2007
Research Article|
January 23 2007
Analysis of the propagation of terahertz surface plasmon polaritons on semiconductor groove gratings
M. Kuttge;
M. Kuttge
a)
Institute of Semiconductor Technology,
RWTH-Aachen University
, D-52056 Aachen, Germany
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H. Kurz;
H. Kurz
Institute of Semiconductor Technology,
RWTH-Aachen University
, D-52056 Aachen, Germany
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J. Gómez Rivas;
J. Gómez Rivas
FOM Institute for Atomic and Molecular Physics AMOLF
, c/o Philips Research Laboratories, High-Tech-Campus 4, 5656 AE Eindhoven, The Netherlands
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J. A. Sánchez-Gil;
J. A. Sánchez-Gil
Instituto de Estructura de la Materia,
Consejo Superior de Investigaciones Científicas
, Serrano 121, E-28006 Madrid, Spain
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P. Haring Bolívar
P. Haring Bolívar
Institute of High Frequency and Quantum Electronics,
University of Siegen
, Hölderlinstrasse 3, D-57068 Siegen, Germany
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a)
Electronic mail: kuttge@amolf.nl
J. Appl. Phys. 101, 023707 (2007)
Article history
Received:
July 25 2006
Accepted:
November 07 2006
Citation
M. Kuttge, H. Kurz, J. Gómez Rivas, J. A. Sánchez-Gil, P. Haring Bolívar; Analysis of the propagation of terahertz surface plasmon polaritons on semiconductor groove gratings. J. Appl. Phys. 15 January 2007; 101 (2): 023707. https://doi.org/10.1063/1.2409895
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