Amplified spontaneous emission and laser emission from a high optical-gain medium of dye-doped dendrimer

Shiyoshi Yokoyama, Tatsuo Nakahama, Shinro Mashiko

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We measured the amplified spontaneous emission and laser emission from high-gain media of laser-dye encapsulated dendrimers. A highly branched poly(amidoamine) (PAMAM-OH) dendrimer formed a guest-host complex with a conventional laser-dye (DCM), resulting in a high optical-gain. Of particular note was the appearance of a laser threshold, above which a super-narrowed laser spectrum was observed, although laser feedback was caused without any mirror cavity devices. The optical feedback was attributed to spatial confinement of the light due to gain guiding under optical excitation. The laser spectrum clearly indicated a resonant laser-mode with a spectrum linewidth of less than 0.1 nm. This order of spectrum narrowing is comparable to that seen in the laser emission from ordinary laser devices.

Original languageEnglish
Pages (from-to)285-290
Number of pages6
JournalJournal of Luminescence
Volume111
Issue number4 SPEC. ISS.
DOIs
Publication statusPublished - Jan 1 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Biochemistry
  • Condensed Matter Physics

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