title: Widely tunable lasing in a colloidal crystal gel film permanently stabilized by an ionic liquid.
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.
authors.affiliation: Applied Photonic Materials Group, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan; Nanosystems and Emergent Functions Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan. FURUMI.Seiichi@nims.go.jp.
authors.forename: Seiichi
authors.initials: S
authors.lastname: Furumi
authors.forename: Toshimitsu
authors.initials: T
authors.lastname: Kanai
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Sawada