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Planar Hot-Electron Photodetection with Tamm Plasmons.

Cheng Zhang^1,2, Kai Wu^1,2, Vincenzo Giannini³

¹College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China.

|January 25, 2017

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This study introduces a novel planar hot-electron photodetector using Tamm plasmons (TPs). This simplified design offers high performance and tunable detection, overcoming challenges of traditional nanostructured systems.

Area of Science:

Photonics and Optoelectronics
Materials Science
Nanotechnology

Background:

Growing interest in harvesting photoejected hot-electrons for advanced photodetectors.
Conventional surface plasmon (SP) systems face fabrication challenges and complexity.
Need for simpler, tunable, and high-performance hot-electron photodetector designs.

Purpose of the Study:

To present a purely planar hot-electron photodetector based on Tamm plasmons (TPs).
To demonstrate a simplified alternative to complex nanostructured SP systems.
To achieve high photoresponsivity and tunable detection wavelengths.

Main Methods:

Fabrication of a planar metal/semiconductor/metal device incorporating a distributed Bragg reflector.
Excitation of Tamm plasmon resonance for enhanced light absorption.

Keywords:

Tamm plasmons hot electrons photodetector photoresponsivity surface plasmons

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Integration of hot-electron collection layers.

Main Results:

Achieved strong light confinement and absorption (>87%) via TP resonance.
Demonstrated a strong, unidirectional photocurrent with high photoresponsivity.
Exhibited narrow-band resonance, high tunability, and stability against incident angle changes.

Conclusions:

The planar TP configuration significantly simplifies hot-electron photodetector fabrication.
This approach offers a pathway to high-performance, low-cost hot-electron photodetection.
The system shows potential for extended functionalities and tunable wavelength detection.