Article

Plasmonics

, Volume 6, Issue 2, pp 319-325

First online:

Optimization of Optoelectronic Plasmonic Structures

  • Hengliang WangAffiliated withInstitute of Advanced Materials and State Key Laboratory of Surface Physics, Fudan University
  • , Zhenghua AnAffiliated withInstitute of Advanced Materials and State Key Laboratory of Surface Physics, Fudan University Email author 
  • , Che QuAffiliated withInstitute of Advanced Materials and State Key Laboratory of Surface Physics, Fudan University
  • , Shiyi XiaoAffiliated withInstitute of Advanced Materials and State Key Laboratory of Surface Physics, Fudan University
  • , Lei ZhouAffiliated withInstitute of Advanced Materials and State Key Laboratory of Surface Physics, Fudan University
  • , Susumu KomiyamaAffiliated withDepartment of Basic Science, University of Tokyo
  • , Wei LuAffiliated withNational Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences
  • , Xuechu ShenAffiliated withInstitute of Advanced Materials and State Key Laboratory of Surface Physics, Fudan UniversityNational Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences
  • , Paul K. ChuAffiliated withDepartment of Physics and Materials Science, City University of Hong Kong

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Abstract

We discuss the interplay between surface plasmon polaritons (SPPs) and localized shape resonances (LSRs) in a plasmonic structure working as a photo-coupler for a GaAs quantum well photodetector. For a targeted electronic inter-subband transition inside the quantum well, maximum photon absorption is found by compromising two effects: the mode overlapping with incident light and the lifetime of the resonant photons. Under the optimal conditions, the LSR mediates the coupling between the incident light and plasmonic structure while the SPP provides long-lived resonance which is limited ultimately by metal loss. The present work provides insight to the design of plasmonic photo-couplers in semiconductor optoelectronic applications.

Keywords

Surface plasmon polariton Localized shape resonance Extraordinary optical transmission Inter-subband transition