Semiconductor plasmonic crystals: Active control of THz extinction

Author

Schaafsma, Martijn C. ; Gomez Rivas, Jaime

Author_Institution

Center for Nanophotonics, FOM Inst. AMOLF, Amsterdam, Netherlands

fYear

2013

fDate

1-6 Sept. 2013

Firstpage

1

Lastpage

2

Abstract

We study the scattering, absorption and extinction of THz radiation by 2D plasmonic crystals formed by periodic arrays of semiconductor particles. The particles sustain localized surface plasmon resonances that can couple to diffracted orders of the array giving rise to hybrid plasmonic-photonic modes. These modes exhibit extraordinary extinction and narrow line widths. The coupling strength and, consequently, the extinction can be actively tuned by changing the carrier concentration in the semiconductor, which is achieved by optical pumping.

Keywords

carrier density; optical pumping; plasmonics; semiconductors; surface plasmon resonance; terahertz wave spectra; 2D plasmonic crystals; active control; array diffracted orders; carrier concentration; coupling strength; extraordinary extinction; hybrid plasmonic-photonic modes; localized surface plasmon resonances; narrow line widths; optical pumping; periodic arrays; semiconductor particles; semiconductor plasmonic crystals; terahertz radiation absorption; terahertz radiation extinction; terahertz radiation scattering; Charge carriers; Gallium arsenide; Lattices; Optical pumping; Permittivity; Plasmons; Silicon;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on

Conference_Location

Mainz

Type

conf

DOI

10.1109/IRMMW-THz.2013.6665571

Filename

6665571