Polarization dependent mode dynamics of metallic hybrid laser micro-resonator

Mode dynamics of metallic hybrid laser micro-resonator are investigated by the general waveguide theory. By tuning the thickness of sandwiched low refractive index dielectric layer, the lateral metal enables compression and release of the electric field into and from gain medium for both transverse electric and magnetic modes (TE/M), enhancing and weakening the coherent interaction of gain medium and quantized resonant mode. The mode quality (Q) factors depending on the geometric parameters are explored by power integration in waveguide and present different features for TE and TM polarizations. The influences of both cladding and dielectric layers on the gain threshold of passive micro-resonator are studied as well, showing that TE mode needs lower gain threshold than TM mode for compensating the overall dissipation of metal.