Angular-dependent photodetection enhancement by a metallic circular disk optical antenna | Zendy

Thitikorn Kemsri | Zendy; Guiru Gu | Zendy; Yingjie Zhang | Zendy; Xing Lan | Zendy; Hualiang Zhang | Zendy; Jesse Tice | Zendy; Xuejun Lu | Zendy

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Angular-dependent photodetection enhancement by a metallic circular disk optical antenna

Author(s) -

Thitikorn Kemsri,

Guiru Gu,

Yingjie Zhang,

Xing Lan,

Hualiang Zhang,

Jesse Tice,

Xuejun Lu

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4975705

Subject(s) - optics , plasmon , optoelectronics , antenna (radio) , wavelength , photodetection , physics , photodetector , telecommunications , computer science

In this paper, we analyze the plasmonic resonance excited by linearly polarized longwave infrared (LWIR) plane waves in a metallic circular disk optical antenna (MCDA). The surface current distributions are simulated at different wavelengths, incident angles, and polarizations. The excited surface plasmonic resonance waves (SPRs) are different from the Bessel-type of SPR modes and closely resemble those in a monopole antenna. An MCDA coupled LWIR quantum dot infrared photodetector (QDIP) was fabricated and measured at different LWIR plane wave wavelengths and incident angles. A linear correlation between the enhancement ratio and the integrated square of the current is obtained, indicating the monopole antenna effect is a dominating factor for the plasmonic enhancement

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