Plasmonic gap mode nanocavities at telecommunication wavelengths

Pi Ju Cheng, Chen Ya Weng, Shu Wei Chang, Tzy Rong Lin, Chung-Hao Tien

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


We analyze a plasmonic gap-mode Fabry-Perot nanocavity containing a metallic nanowire. The proper choice of the cladding layer brings about a decent confinement inside the active region for the fundamental and first-order plasmonic gap modes. We numerically extract the reflectivity of the fundamental and first-order mode and obtain the optical field inside the cavity. We also study the dependence of the reflectivity on the thickness of Ag reflectors and show that a decent reflectivity above 90 % is achievable. For such cavities with a cavity length approaching 1.5 μm, a quality factor near 150 and threshold gain lower than 1500 cmâ 1 are achievable.

Original languageEnglish
Title of host publicationPhysics and Simulation of Optoelectronic Devices XXII
ISBN (Print)9780819498939
StatePublished - 2014
EventPhysics and Simulation of Optoelectronic Devices XXII - San Francisco, CA, United States
Duration: 3 Feb 20146 Feb 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferencePhysics and Simulation of Optoelectronic Devices XXII
Country/TerritoryUnited States
CitySan Francisco, CA


  • Nanotechnology
  • Semiconductor lasers
  • Surface plasmons


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