Low-threshold blue emission from first-order organic DFB laser using 2,7-bis[4-(N-carbazole)phenylvinyl]- 9,9′-spirobifluorene as active gain medium

Masaya Hirade, Hajime Nakanotani, Reiji Hattori, Akihiro Ikeda, Masayuki Yahiro, Chihaya Adachi

Research output: Contribution to journalArticle

Abstract

We demonstrate optically excited lasing by an organic semiconducting thin-film based on 2,7-bis[4-(N-carbazole)phenylvinyl]-9,9′- spirobifluorene (spiro-SBCz) as an active gain medium with a first-order distributed feedback (DFB) reflector. We prepared DFB reflectors with periods from 132.5 to 145.00nm and grooves from 70 to 140nm depth by using electron-beam-lithography and plasma-etching techniques. The laser having a reflector with a 145.0nm period had a lasing threshold of 0.72±0.07 μJ=cm2, 83% lower than its threshold of amplified spontaneous emission (4.1±0.4 μJ=cm2).

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalMolecular Crystals and Liquid Crystals
Volume504
Issue number1
DOIs
Publication statusPublished - Jan 1 2009

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Low-threshold blue emission from first-order organic DFB laser using 2,7-bis[4-(N-carbazole)phenylvinyl]- 9,9′-spirobifluorene as active gain medium'. Together they form a unique fingerprint.

  • Cite this