Polarization characteristics of phase retardation defect mode lasing in polymeric cholesteric liquid crystals

Myoung Hoon SongDepartment of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo152-8552, Japan

Ki-Chul ShinDepartment of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo152-8552, Japan

Byoungchoo ParkDepartment of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo152-8552, Japan

Yoichi TakanishiDepartment of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo152-8552, Japan

Ken IshikawaDepartment of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo152-8552, Japan

Junji WatanabeDepartment of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo152-8552, Japan

Suzushi NishimuraCentral Technical Research Lab., Nippon Oil Corporation, Chidoricho 8, Naka-ku, Yokohama231-0815, Japan

Takehiro ToyookaCentral Technical Research Lab., Nippon Oil Corporation, Chidoricho 8, Naka-ku, Yokohama231-0815, Japan

Zhengguo ZhuDepartment of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA02139, USA

Timothy M. SwagerDepartment of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA02139, USA

Hideo TakezoeDepartment of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo152-8552, JapanCorrespondence[email protected]

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Abstract

We have studied the lasing characteristics of a dye-doped nematic layer sandwiched by two polymeric cholesteric liquid crystal (CLC) films as photonic band gap (PBG) materials. The nematic layer acts as a defect layer, the anisotropy of which brings about the following remarkable optical characteristics: (1) reflectance in the PBG region exceeds 50% due to the retardation effect, being unpredictable from a single CLC film; (2) efficient lasing occurs either at the defect mode wavelength or at the photonic band edge; and (3) the lasing emission due to both the defect mode and the photonic band edge mode contains both right- and left-circular polarizations, while the lasing emission from a dye-doped single CLC layer with a left-handed helix is left-circularly polarized.

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Polarization characteristics of phase retardation defect mode lasing in polymeric cholesteric liquid crystals

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