Title :
THz from photoconductive antennas using circular and cylindrical Microlens arrays
Author :
Singh, Abhishek ; Awari, Nilesh ; Prabhu, S.S. ; Vengurlekar, A.S.
Author_Institution :
Tata Inst. of Fundamental Res., Mumbai, India
Abstract :
We study the THz radiation emission from interdigitated Photo-Conductive Antennas (iPCAs) fabricated on Semi-insulating GaAs substrates and excited using 800nm, 10fs, 76MHz laser pulses through circular and cylindrical Microlens arrays put over the antennas. THz emission is an order of magnitude higher from cylindrical micro-lens array compared to circular micro-lens array, at the same bias voltage. The line excitation appears to be more efficient in generating THz than a point excitation.
Keywords :
antenna arrays; gallium arsenide; lens antennas; photoconducting devices; GaAs; circular microlens arrays; cylindrical microlens arrays; interdigitated photo-conductive antennas; photoconductive antennas; radiation emission; Antenna arrays; Lenses; Microoptics; Optical device fabrication; Optical pulses; Ultrafast optics;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6105223
