Title :
Concentration of terahertz radiation through tapered circular subwavelength apertures
Author :
Nguyen, Tho Duc ; Vardeny, Z.Valy ; Nahata, Ajay
Author_Institution :
Dept. of Phys., Univ. of Utah, Salt Lake City, UT, USA
Abstract :
We demonstrate the concentration of broadband terahertz radiation through conically tapered subwavelength apertures. Concomitantly, there is a reduction of the THz group velocity for the transmitted pulse. We describe the underlying principle behind this phenomenon.
Keywords :
optical focusing; surface plasmon resonance; terahertz waves; broadband terahertz radiation; conically tapered subwavelength apertures; tapered circular subwavelength apertures; Apertures; Cutoff frequency; Electromagnetic measurements; Optical films; Optical pulses; Optical surface waves; Optical waveguides; Phase measurement; Pulse measurements; Spectroscopy;
Conference_Titel :
Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science Conference (QELS), 2010 Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-890-2
Electronic_ISBN :
978-1-55752-890-2
