Widely tunable lasing in a colloidal crystal gel film permanently stabilized by an ionic liquid

  • Furumi S
  • Kanai T
  • Sawada T
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Abstract

Widely tunable laser action by low threshold optical excitation can be realized by a colloidal crystal gel (CC-G) film permanently stabilized by a non-volatile ionic liquid. The CC-G film consists of a non-close-packed structure of microparticles immobilized in a polymer gel. Optical excitation with green light gives rise to a single and very narrow laser emission with red color. The single laser emission peak can be tuned in a wide wavelength range by applying mechanical stress.

Author-supplied keywords

  • colloidal crystals
  • lasing
  • photonic bandgaps
  • tunable emission

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