Abstract
A unidirectional coherent random laser is constructed by a sandwich structure consisting of two polydimethylsiloxane plates and a highly transparent ultra-thin liquid active layer embedded with silica nanoparticles (NPs). The optical feedback of the random laser is provided by both strong waveguide confinement and the SiO2 NPs’ multiple scattering. Compared with random laser in a quartz cuvette, the pump threshold is only 700 µJ cm−2. The lowest threshold is obtained in an optimum concentration of silica NPs. The change of peak positions in the liquid waveguide structure is larger than that in the quartz cuvette for different solvents. The peak-shift of the emission wavelength is more sensitive in the liquid waveguide structure, which is a promising platform for bio-chemical and bio-sensing applications.
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.
