Multimode analysis of highly tunable, quantum cascade powered, circular graphene spaser

Charith Kohomban Wickrama Jayasekara, Malin Premaratne, Mark Ilich Stockman, Sarath D Gunapala

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)


We carried out a detailed analysis of a circular graphene spaser made of a circular graphene flake and a quantum cascade well structure. Owing to unique properties of graphene and quantum cascade well structure, the proposed design shows high mechanical and thermal stability and low optical losses. Additionally, operation characteristics of the model are analysed and tunability of the device is demonstrated. Some advantages of the proposed design include compact size, lower power operation, and the ability to set the operating wavelength over a wide range from Mid-IR to Near-IR. Thus, it can have wide spread applications including designing of ultracompact and ultrafast devices, nanoscopy and biomedical applications.
Original languageEnglish
Article number173101
Pages (from-to)1 - 8
Number of pages8
JournalJournal of Applied Physics
Issue number17
Publication statusPublished - 2015


  • Graphene
  • Medical applications
  • Biomedical applications
  • Multimode analysis
  • Operating wavelength

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