Ultrathin high efficiency photodetectors based on near field enhanced optical absorption

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Optical absorbers, comprising a thin semiconductor layer put between two transparent ones in close proximity of a subwavelength grating, are considered. These structures with no back mirror only mimic resonant cavity enhanced photodetector, being an order of magnitude thinner. It is argued that properly designed grating can assist the light confinement by near field microcavity resonance rather than by a mirroring. Tolerant designs to attain nearly 100% optical absorption at a predefined wavelength are demonstrated, and the near-field enhancement of the absorption is confirmed.

Original languageEnglish
Title of host publicationCLEO
Subtitle of host publicationApplications and Technology, CLEO-AT 2015
PublisherOptical Society of America
ISBN (Electronic)9781557529688
StatePublished - 4 May 2015
EventCLEO: Applications and Technology, CLEO-AT 2015 - San Jose, United States
Duration: 10 May 201515 May 2015


ConferenceCLEO: Applications and Technology, CLEO-AT 2015
Country/TerritoryUnited States
CitySan Jose


  • Absorption
  • Cavity resonators
  • Gratings
  • Microcavities
  • Mirrors
  • Optical sensors
  • Photodetectors

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials


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