Title :
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
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;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665571
