High power THz photoconductive antenna using localized surface plasmon resonance

Author

Park, Sang-Gil ; Choi, Yongje ; Yi, Minwoo ; Choi, Jun-Hyuk ; Jin, Kyung-Hwan ; Ye, Jong-Chul ; Ahn, Jaewook ; Jeong, Ki-Hun

Author_Institution

KAIST, Daejeon, South Korea

fYear

2010

Firstpage

55

Lastpage

56

Abstract

This work presents a plasmon-enhanced photo-conductive antenna for high power THz emission using the localized surface plasmon resonance of hierarchically patterned silver nanoislands. The silver nanoislands on a photoconductive region enhance the electrical amplitude of pump laser beam and the scattering of the pump beam so that the optical power transmitted toward the substrate is amplified. As a result, a high transition rate of the photo-excited carrier was obtained. The plasmon-enhanced antenna shows 1.6-fold increase of peak-to-peak amplitude of the emitted THz wave compared to the photo-conductive antenna without silver nanoislands.

Keywords

antennas; microwave photonics; nanophotonics; nanostructured materials; optical pumping; photoconducting devices; photoexcitation; silver; surface plasmon resonance; Ag; THz emission; THz photoconductive antenna; beam scattering; electrical amplitude; localized surface plasmon resonance; optical power transmission; patterned silver nanoislands; photoexcited carrier; plasmon-enhanced photoconductive antenna; pump laser beam; Annealing; Antennas; Electrodes; Optical pumping; Principal component analysis; Scattering; Silver;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical MEMS and Nanophotonics (OPT MEMS), 2010 International Conference on

Conference_Location

Sapporo

Print_ISBN

978-1-4244-8926-8

Electronic_ISBN

978-1-4244-8925-1

Type

conf

DOI

10.1109/OMEMS.2010.5672186

Filename

5672186