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

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

Photonics Technology Letters, IEEE（2010）

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摘要

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 cmHz1/2/W at 20 K and the background limited temperature is between 60 K-70 K. It can be applied to fabricate focal plane arrays.

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关键词

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

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