Abstract
A method of probing the exciton band structure about the centre of the Brillouin zone is developed. Oblique angle reflectance spectra at angles of incidence up to 80° for a (001) face of an anthracene crystal have been obtained for both an air-crystal and a silica-crystal interface. A method for transforming the reflectance data to optical constants is developed and used. From this method the direction of propagation of radiation k̂ at any frequency inside the crystal for any incident angle can be determined. For a model of an isotropic crystal consisting of anisotropic molecules, dipole-dipole theory for an arbitrary k̂ is developed, exciton band structures from this theory are calculated and theoretical spectra based on these calculated band structures are presented. The theoretical spectra are in very good agreement with the experimental data. Information about the exciton density of states is deduced from the results.
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.
