Active whispering-gallery-mode optical microcavity based on self-assembled organic microspheres

Abstract

The self-assembled organic microspheres of (E)-3-(4-(dip-tolylamino)phenyl)-1-(4-fluoro-2-hydroxyphenyl)prop-2-en-1-one (DTPHP) are fabricated, which serve as active WGM resonators. In addition, a dispersion relationship between the group refractive index (n_g) and wavelength (λ) is revealed to demonstrate the strong light–matter interaction inside the WGM microcavity with a maximum n_g to be 7.7.