Abstract
Here we have fabricated ZnO based microcavity as optical resonator to achieve whispering gallery mode (WGM) luminescence through visible excitations. We have observed defect related WGM emissions by individual ZnO microsphere through visible laser excitations of 532 nm wavelength. Further, in order to get visible stimulated emissions, we have considered the doping of 2 mol.% of monovalent (Li+) ion to increase the number of defects in ZnO. Nevertheless, here the ZnO and 2 mol.% Li doped ZnO (Li-ZnO) microcavities (microspheres) are synthesized by using hydrothermal synthesis technique. Here we have considered four distinguished 2 mol.% Li-ZnO microspheres to check the consistency of the stimulated emission behavior. We have observed that the stimulated emissions are achieved through all the four Li-ZnO microspheres at threshold pumping power density of 48 mW/cm2 of the laser source. Therefore, we have proposed these doped microresonators for their promising applications to design the WGM based visible laser cavities.
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.
