Electrically color-tunable defect mode lasing in one-dimensional photonic-band-gap system containing liquid crystal

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摘要：

Electrical tuning of the wavelength of the defect-mode lasing in a one-dimensional periodic structure has been demonstrated using a dye-doped nematic liquid crystal as a defect layer in the periodic structure. Lasing wavelength is widely tuned upon applying an electric field, which is due to the refractive index change in the defect layer caused by the field-induced realignment of the liquid crystal molecules.

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关键词：

Experimental/ electro-optical effects laser tuning molecular reorientation nematic liquid crystals photoluminescence photonic band gap photonic crystals refractive index solid lasers visible spectra/ one-dimensional photonic-band-gap system liquid crystal electrically color-tunable defect mode lasing electrical wavelength tuning one-dimensional periodic structure dye-doped nematic liquid crystal defect layer lasing wavelength tuning refractive index change field-induced liquid crystal molecule realignment E47 transmission spectra photoluminescence spectrum SiO 2-TiO 2/ A4270Q Photonic bandgap materials A4255R Lasing action in other solids A4260F Laser beam modulation, pulsing and switching mode locking and tuning A4270D Liquid crystals (optical materials) A6130G Orientational order of liquid crystals in electric and magnetic fields A7820J Electro-optical effects (condensed matter) / SiO2-TiO2/int SiO2/int TiO2/int O2/int Si/int Ti/int O/int SiO2/bin TiO2/bin O2/bin Si/bin Ti/bin O/bin