Terahertz Radiation-Band Engineering Through Spatial Beam-Shaping

Author

Jarrahi, Mona

Author_Institution

Electr. Eng. Dept., Univ. Opt. of Michigan, Ann Arbor, MI

Volume

21

Issue

13

fYear

2009

fDate

7/1/2009 12:00:00 AM

Firstpage

830

Lastpage

832

Abstract

We propose a terahertz (THz)-band engineering technique based on generation of specifically designed time-domain radiation. The desired time-domain radiation is formed by combining the time-delayed outputs of an array of photoconductive antennas. We have employed this technique to generate tunable narrowband THz radiation. By using an array of identical photoconductive antennas with identical spacings, we have demonstrated a 12.5-mW output peak-power over 0.05-THz bandwidth and a tuning range of 0.65-1.4 THz. Considering the 2.5-THz bandwidth of each individual photoconductive antenna, 50 times higher power efficiency is achieved as a result of radiation-band shaping.

Keywords

antenna arrays; millimetre wave generation; photoconducting devices; bandwidth 0.05 THz; bandwidth 2.5 THz; frequency 0.65 THz to 1.4 THz; photoconductive antenna array; power 12.5 mW; radiation band shaping; spatial beam shaping; terahertz radiation band engineering; time-domain radiation; tunable narrowband terahertz radiation; Mode-locked laser; molecular beam epitaxy; photoconductivity;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2019620

Filename

4813271