6. TERAHERTZ PLASMONICS

NONINTERFEROMETRIC TECHNIQUES TO DETERMINE TERAHERTZ SURFACE-PLASMON COPLEX REFRACTIVE INDEX

Vasily V. Gerasimov
1. Budker Institute of Nuclear Physics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
einy@ngs.ru
Boris A. Knyazev
1. Novosibirsk State University Novosibirsk, Russian Federation
2. Budker Institute of Nuclear Physics SB RAS Novosibirsk, Russian Federation
ba_knyazev@phys.nsu.ru
Alexey K. Nikitin
1. Novosibirsk State University Novosibirsk, Russian Federation
2. Scientific and Technological Center for Unique Instrumentation, RAS Moscow, Russia
alnikitin@mail.ru
The material was received by the Editorial Board: 15.09.2010
Two noninterferometric techniques for mtasurement of THz surface plasmon (SP) refractive index κ are presented. The first method involves splitting of the initial SPs beam into two new ones and measurements of the SP decoupling angle on a diffractional grating. The second method is based on the fact that THz SP field penetration depth δ into air can be expressed through κ and measured directly. Numerical modeling of both techniques has been carried out.

Keywords:
surface plasmons, complex refractive index, dispersive spectroscopy, terahertz radiation, free electron laser. 
УДК 535.15:535.321

NONINTERFEROMETRIC TECHNIQUES TO DETERMINE TERAHERTZ SURFACE-PLASMON COPLEX REFRACTIVE INDEX
References: Gerasimov V. V., Knyazev B. A., Nikitin A. K., Nikitin V. V. NONINTERFEROMETRIC TECHNIQUES TO DETERMINE TERAHERTZ SURFACE-PLASMON COPLEX REFRACTIVE INDEX. Vestnik NSU. Series: Physics. 2010, vol. 5, no. 4. P. 147–150 (in Russ.). DOI: 10.54362/1818-7919-2010-5-4-147-150