Abstract
By using acrylate monomers and increasing the fabricating temperature to thenematic–isotropic transition point of liquid crystal, a polarization-independentholographic polymer dispersed liquid crystal (HPDLC) transmission grating isdemonstrated, which is different from the conventional anisotropic grating forms atroom temperature. Also, about 25% more liquid crystal is phase separated out toform the pure liquid crystal layer and the scattering loss of the Bragg diffractiongrating is reduced from 8% to 4%. These results are explained by means of opticalmeasurements. The randomly aligned liquid crystal (LC) molecules in the pure LClayer of the transmission grating bring in a much higher refractive index contrastfor photons of specific frequency propagating along the grating vector, whichresults in a much more effective light feedback effect. Experimental results of thistransmission grating as a distributed feedback laser show a lasing output with afull width at half maximum (FWHM) of about only 0.6 nm and a threshold of6 µJ/pulse.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
