Highly Desirable Photodetectors Derived from Versatile Plasmonic Nanostructures

Abstract

With unique ability to concentrate and manipulate light at nanoscale, surface plasmon resonance technologies create additional opportunities for fabricating superintegration photodetectors with desirable functionalities. To gain an insight into the state-of-the-art of plasmonic photodetectors, recent advances in novel devices as well as potential building blocks are presented herein. The article focuses particularly on understanding the enhancement mechanism of different architectures such as nanoparticles, gratings, waveguides, antennas, and microcavities. Meanwhile, challenges and potential design schemes are proposed in this inspiring field.

Materials and Designs for Wearable Photodetectors

“…Several eye‐catching work of wearable PDs based on fiber substrates has been reported recently where nickel wires, titanium wires, Kevlar fibers, carbon nanotube (CNT) fibers, ZnO fibers, etc. were employed . According to current fiber based PDs, the most extensively used fibers for wearable PDs are metal fibers (for it can serve as an electrode as well as the reactant for photoactive material synthesis) and polymer fibers (for it can be reformed into any shape with little effort and serve as encapsulation material) .…”

Enhanced Photocarrier Generation with Selectable Wavelengths by M‐Decorated‐CuInS2 Nanocrystals (M = Au and Pt) Synthesized in a Single Surfactant Process on MoS2 Bilayers

“…Previous works have revealed the enhanced electromagnetic field and the light confinement effect by combining plasmonic metal nanostructures and 2D‐based photodetectors, leading to the improvement of the light absorption under the visible spectral region . Also, by applying metal particles with diverse morphologies such as nanoparticles, nanotubes/nanowires, nanodiscs, core–shell particles and creating nanoarray patterns, the resonance wavelength can be tunable. To achieve the better performance of photodetector on the MoS 2 layered material, we aim to combine highly absorptive CuInS 2 (CIS) nanoparticles with noble metal nanoparticles as the photosensitizer to enhance the intrinsic absorptivity of noble metal nanocrystals.…”

Broadband Photodetectors Enabled by Localized Surface Plasmonic Resonance in Doped Iron Pyrite Nanocrystals

“…In conventional semiconductors, the spectral range of the photoresponse is limited to the photons of energies above the energy bandgap of the semiconductor . One approach to break this fundamental limit is combining plasmonic metallic particles or films with localized surface plasmon resonances (LSPRs) . Another one is doping into the semiconductor nanocrystals to induce strong LSPRs .…”