Two-Color Qauntum-Dot Infrared Photodetectors With Periodic Cross Metal Hole Array Contact

Author

Lee, Jheng-Han ; Chang, Yi-Tsung ; Huang, Chao-Ju ; Lin, Shih-Yen ; Lee, Si-Chen

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

22

Issue

8

fYear

2010

fDate

4/15/2010 12:00:00 AM

Firstpage

577

Lastpage

579

Abstract

The two-color quantum-dot infrared photodetector (QDIP) has been fabricated successfully by the use of top metal contact perforated with cross hole arrays. One transmission peak is located at 4-6 ??m; the other is located at 8-10 ??m . The periodic contact metal hole arrays play double roles, i.e., the top contact and the optical filter. Patterning with lattice constants a = 1.6 ??m and a = 2.8 ??m, the 4- to 6-??m and 8- to 11-??m wavelength ranges can be detected. The two-color QDIP detectivity can be increased up to 1.85 ??10¹¹ cmHz^1/2/W at 20 K and the background limited temperature is between 60 K-70 K. It can be applied to fabricate focal plane arrays.

Keywords

focal planes; infrared detectors; lattice constants; optical filters; photodetectors; quantum dots; focal plane arrays; lattice constants; optical filter; periodic cross metal hole array contact; temperature 60 K to 70 K; top metal contact; two color quantum dot infrared photodetectors; wavelength 4 mum to 6 mum; wavelength 8 mum to 11 mum; Infrared photodetector; quantum dots (QDs); surface plasmons (SPs);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2010.2043090

Filename

5419060