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Related Experiment Video

Updated: Mar 21, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Pixel-level plasmonic microcavity infrared photodetector.

You Liang Jing1,2, Zhi Feng Li1,2, Qian Li1,2

  • 1National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yutian Road, Shanghai 200083, P. R. China.

Scientific Reports
|May 17, 2016
PubMed
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Researchers developed a novel plasmonic microcavity infrared photodetector. This device shows over tenfold enhanced responsivity, improving infrared sensing and imaging capabilities.

Area of Science:

  • Photonics and optoelectronics
  • Nanotechnology and plasmonics

Background:

  • Plasmonics enables subwavelength photon manipulation.
  • Infrared imaging is crucial for diverse applications.

Purpose of the Study:

  • To demonstrate the first pixel-level plasmonic microcavity infrared photodetector.
  • To enhance infrared photodetector performance using plasmonic effects.

Main Methods:

  • Integration of a single quantum well between metal patches and a reflection layer.
  • Utilizing a plasmonic microcavity design for enhanced light-matter interaction.

Main Results:

  • Achieved over one order of magnitude enhancement in peak responsivity.
  • Observed strong coupling between photons and the quantum well due to confined optical modes.

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  • Demonstrated angle-independent performance of the localized surface plasmon mode.

    • Conclusions:

    • The plasmonic microcavity design significantly boosts infrared photodetector performance.
    • This technology offers a unique solution for high-performance focal plane array devices.
    • Paves the way for advanced infrared optoelectronic devices for sensing and imaging.