Title :
“Trapped Rainbow” effect within graded gratings for localization and detection of THz frequency components
Author :
Montazeri, Arthur O. ; Fang, Michael ; Kherani, Nazir P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada
Abstract :
A graded grating is used to localize frequency components of a broadband THz source. We show spatial localization of the field within the grating. Further, various nano-antennas placed within the structure are amenable to detecting the trapped signal. This is verified using both time-domain and frequency-domain simulations in the range of 0.1-90 THz. The lifetimes of these trapped modes are found to be about 0.5 ps at the excitation frequency of 30 THz.
Keywords :
dipole antennas; electromagnetic fields; signal detection; terahertz wave detectors; tunnel diodes; THz frequency component detection; broadband terahertz source; dipole nanoantenna detector; field spatial localization; frequency 0.1 THz to 90 THz; frequency component localization; frequency-domain simulations; graded gratings; time-domain simulation; trapped modes; trapped rainbow effect; trapped signal detection; tunnelling nanodiodes; Broadband communication; Couplings; Dipole antennas; Educational institutions; Frequency domain analysis; Gratings; Time domain analysis;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6379513
