Title :
An optically tunable terahertz perfect absorber
Author :
Seren, H.R. ; Strikwerda, Andrew C. ; Cao, L. ; Keiser, G. ; Zhang, Juyong ; Fan, Kuikui ; Metcalfe, G. ; Wraback, M. ; Averitt, R.D. ; Zhang, Xiaobing
Author_Institution :
Dept. of Mech. Eng., Boston Univ., Boston, MA, USA
Abstract :
We experimentally demonstrate a micro-fabricated optically tunable terahertz (THz) perfect absorber utilizing sub-wavelength split ring resonator arrays with photo-conductive silicon islands in the capacitive gaps (Fig. 1). We achieved approximately 90% normalized absorption and 44% absorption intensity modulation at the resonance frequency 0.7 THz.
Keywords :
electromagnetic wave absorption; elemental semiconductors; microfabrication; optical tuning; silicon; terahertz metamaterials; Si; absorption intensity modulation; capacitive gaps; frequency 0.7 THz; metamaterial; microfabrication; optically tunable terahertz perfect absorber; photoconductive silicon islands; resonance frequency; sub-wavelength split ring resonator arrays; Absorption; Conductivity; Metamaterials; Optical device fabrication; Optical ring resonators; Permittivity; Silicon; Metamaterial; perfect absorber; terahertz;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013 Transducers & Eurosensors XXVII: The 17th International Conference on
Conference_Location :
Barcelona
DOI :
10.1109/Transducers.2013.6627047
