Tunable and broadband negative group delays in a birefringent waveguide

Author

Yao, H.Y. ; Chen, N.C. ; Chang, T.H. ; Winful, H.G.

Author_Institution

Dept. of Phys., Nat. Tsing Hua Univ., Hsinchu, Taiwan

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

We report the observation of negative group delay in a simple anisotropic cylindrical waveguide in the millimeter-wave region. With a 45° linearly polarized input, a relatively broad band of negative group delay was observed with 3.57% bandwidth, where the maximum group advancement achieved was about 24 times greater than the luminal delay, implying a fractional advancement of 13.32%. The peak advancement can be precisely controlled by tuning the incident field polarization azimuth, which should benefit the applications in wave-packet switching and signal processing.

Keywords

birefringence; circular waveguides; light polarisation; millimetre wave circuits; optical waveguides; birefringent waveguide; fractional advancement; incident field polarization azimuth; linearly polarized input; luminal delay; maximum group advancement; millimeter-wave region; peak advancement; signal processing; simple anisotropic cylindrical waveguide; tunable broadband negative group delay; wave-packet switching; Azimuth; Bandwidth; Broadband communication; Delays; Optical waveguides; Reflection;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956386

Filename

6956386