Thermally tunable liquid crystal distributed feedback laser based on a polymer grating with nanogrooves fabricated by nanoimprint lithography

This work demonstrates a thermally tunable dye-doped liquid crystal (DDLC) distributed feedback (DFB) laser based on a polymer grating. The surface emitting DDLC DFB laser is supported by the second-order Bragg grating with nanogrooves of periodicity of 360 nm which is pre-fabricated using the UV na...

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Bibliographic Details
Published in:Optical materials express 2014-02, Vol.4 (2), p.234-240
Main Authors: Yu, Kai-Yu, Chang, Shih-Hui, Lee, Chia-Rong, Hsu, Teng-Yuan, Kuo, Chie-Tong
Format: Article
Language:English
Subjects:
Biosensors
Diffraction gratings
Gratings (spectra)
Lasers
Liquid crystals
Lithography
Nanostructure
Nanotechnology
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Summary:This work demonstrates a thermally tunable dye-doped liquid crystal (DDLC) distributed feedback (DFB) laser based on a polymer grating. The surface emitting DDLC DFB laser is supported by the second-order Bragg grating with nanogrooves of periodicity of 360 nm which is pre-fabricated using the UV nanoimprint lithography (UV-NIL) method. The lasing wavelength of the DFB laser can be tuned from 625.1 nm to 606.35 nm if the temperature increases from 10 [degrees]C to 50 [degrees]C. The tunability of the laser is attributable to the temperature-sensitive feature in the effective refractive index of the LCs. Such a tunable laser can be used in the fabrication of tunable optical sources and biosensors, and in integrated photonic circuits, optical communication, and laser displays.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.4.000234