Open AccessDestructive interference effect on surface plasmon resonance in terahertz attenuated total reflection
Author(s) -
Hideki Hirori,
Masaya Nagai,
Kōichiro Tanaka
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.010801
Subject(s) - attenuated total reflection , surface plasmon , prism , optics , terahertz radiation , surface plasmon resonance , total internal reflection , plasmon , materials science , refractive index , resonance (particle physics) , localized surface plasmon , surface plasmon polariton , surface wave , reflection (computer programming) , interference (communication) , electromagnetic radiation , optoelectronics , physics , infrared , atomic physics , channel (broadcasting) , electrical engineering , engineering , nanoparticle , computer science , programming language , nanotechnology
We investigate the surface plasmon resonance at the interface between air and n-type (100) oriented-InAs as an active material with a time-domain attenuated total reflection technique with coherent terahertz pulses. The characteristic spectra of the attenuated total reflectivity and phase shift caused by surface plasmon are observed in the Otto configuration. The surface plasmon resonance frequency and the phase jump strongly depend on the wave vector of the evanescent wave, the refractive index of the prism, and the incident angle of the terahertz pulses and the distance between the prism and active material. These features can no longer be explained with conventional Otto's approximation. We show that the interference effect between the electromagnetic wave reflected at the prism-air interface and that reemitted from excited surface plasmon plays a key role in the surface plasmon resonance.