A nano-patterned photonic crystal laser with a dye-doped liquid crystal

Research output: Contribution to journalArticlepeer-review


  • Doo Hyun Ko
  • Stephen M. Morris
  • Alexander Lorenz
  • Flynn Castles
  • Haider Butt
  • Damian J. Gardiner
  • Malik M. Qasim
  • Bodo Wallikewitz
  • Philip J W Hands
  • Timothy D. Wilkinson
  • Gehan A J Amaratunga
  • Harry J. Coles
  • Richard H. Friend

Colleges, School and Institutes

External organisations

  • University of Cambridge
  • Cavendish Laboratory, Department of Physics
  • Department of Chemical Engineering
  • Center for Opto-Electronic Convergence Systems
  • Korea Institute of Science and Technology


Covering a nano-patterned titanium dioxide photonic crystal (PC) within a well-oriented film of dye-doped liquid crystal (LC), a distributed feedback laser is constructed whereby the emission characteristics can be manipulated in-situ using an electric field. This hybrid organic-inorganic structure permits simultaneous selectivity of both the beam pattern and laser wavelength by electrical addressing of the LC director. In addition, laser emission is obtained both in the plane and normal to the PC. Along with experimental data, a theoretical model is presented that is based upon an approximate calculation of the band structure of this birefringent, tuneable laser device.


Original languageEnglish
Article number051101
JournalApplied Physics Letters
Issue number5
Publication statusPublished - 29 Jul 2013

ASJC Scopus subject areas