Abstract
Summary form only given. A colloidal crystal of submicron-sized polystyrene spheres in water may serve as a photonic crystal owing to the dielectric contrast between the constituent materials. Such photonic crystals exhibit strong attenuation in regions of the transmission spectrum (stop bands) arising from Bragg diffraction of light by the crystal planes. Stop bands in polystyrene colloidal crystals have been observed and studied extensively for both FCC and BCC crystal phases. Photonic crystals also modify the photonic dispersion relation near the stop band. In addition, defect states can be introduced into the stop band of a colloidal photonic crystal by substitutional doping with microspheres of different size or dielectric strength. We have significantly improved the Mach-Zehnder interferometer used in a previous dispersion study. We report the application of the improved instrument to the study of dispersion in a colloidal crystal with defect states present.
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.
