“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

fYear

2012

fDate

23-28 Sept. 2012

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on

Conference_Location

Wollongong, NSW

ISSN

2162-2027

Print_ISBN

978-1-4673-1598-2

Electronic_ISBN

2162-2027

Type

conf

DOI

10.1109/IRMMW-THz.2012.6379513

Filename

6379513