Separatrix modes in weakly deformed microdisk cavities

Optical modes within III-nitride multiple quantum well microdisk cavities

Rotation-induced evolution of far-field emission patterns of deformed microdisk cavities

A critical issue that hinders the development of chip-scale optical gyroscopes is the size dependence of the Sagnac effect, which manifests as a rotation-induced phase shift or frequency splitting between two counterpropagating waves or resonances, and is proportional to the size of the optical system. We show numerically and theoretically that the far-field emission patterns (FFPs) of optical ...

Dark-field imaging as a noninvasive method for characterization of whispering gallery modes in microdisk cavities.

Whispering gallery mode microdisk cavities fabricated by direct laser writing are studied using dark-field imaging and spectroscopy in the visible spectral range. Dark-field imaging allows us to directly visualize the spatial intensity distribution of whispering gallery modes. We extract their azimuthal and radial mode indices from dark-field images, and find the axial mode number from the disp...

Controlled Tuning of Whispering Gallery Modes of GaN/InGaN Microdisk Cavities

Controlled tuning of the whispering gallery modes of GaN/InGaN μ-disk cavities is demonstrated. The whispering gallery mode (WGM) tuning is achieved at room temperature by immersing the μ-disks in water and irradiating with ultraviolet (UV) laser. The tuning rate can be controlled by varying the laser excitation power, with a nanometer precision accessible at low excitation power (~ several μW)...

Chaotic scattering in deformed optical microlasing cavities.

We consider a common class of dielectric optical microlasing cavities with quadrupolar deformations and address the question of the maximally allowed amount of deformation for both high-Q operation and a high degree of directionality of light emission. Our approach is to compute the probability for light rays to be trapped in the cavity by examining chaotic scattering dynamics in the classical ...