Metal sphere array for long wavelength quantum well infrared photodetectors optical coupling | Zendy

Xiong Da-Yuan | Zendy; Zhifeng Li | Zendy; Xiaohong Chen | Zendy; Ning Li | Zendy; Honglou Zhen | Zendy; Lu Wei | Zendy

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Metal sphere array for long wavelength quantum well infrared photodetectors optical coupling

Author(s) -

Xiong Da-Yuan,

Zhifeng Li,

Xiaohong Chen,

Ning Li,

Honglou Zhen,

Lu Wei

Publication year - 2007

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.56.6648

Subject(s) - quantum well infrared photodetector , coupling (piping) , wavelength , photodetector , optics , radius , physics , optoelectronics , quantum , infrared , metal , materials science , quantum well , quantum mechanics , laser , metallurgy , computer security , computer science

A two-dimensional (2D) metal (Copper) sphere array is designed for the optical coupling of 9.5μm long-wavelength quantum well infrared photodetectors (LW-QWIPs). The optical coupling is studied based on Huygens' principle. It was shown that a metal sphere array with 3μm period and 0.9μm radius can reach optimal optical coupling for the 9.5μm LW-QWIPs. The maximal quantum efficiency hits 66%, which is highly superior to the conventional 45° angle coupling. The theoretical results provide detailed guidelines for 2D metal sphere array optical coupling for 9.5μm LW-QWIPs.

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