Q-factor dependence of angle-resolved transmission spectra in CuCl microcavities

Abstract

Abstract We have investigated the angle-resolved transmission spectra of the CuCl λ-and λ/2-microcavities composed of cavity layers sandwiched by distributed Bragg reflectors (DBRs) with various numbers of periods of the DBR layer which affect the degree of confinement of the photons in the microcavity, so-called quality factors (Q factors). The angle-resolved transmission spectra of the CuCl microcavities drastically change with the Q factor and the thickness of the cavity layer. The incident angle dependence of the peak energies obtained from the angle-resolved transmission spectra indicates that the cavity polariton modes are observed in the CuCl microcavities, except for the λ-microcavity with 2 periods of the DBR layer. The change of the angle-resolved transmission spectra in the microcavities will result from the difference in the coupling state between the excitons and photons in the microcavities.