Silisyum ve elmas mikroyuvarların fısıldayan dalga kiplerinin femtosaniye lazer ile yazılmış cam ve elmas dalga kılavuzları ve cam fiber bağlayıcı ile uyarılması

Whispering gallery modes (WGMs) are the optical resonances, where light is trapped inside a dielectric and symmetric cavity by total internal reflection (TIR) on the boundary facets. Due to the unique optical properties, such as very high quality factors, and very narrow linewidths, due to the long photon lifetime inside the cavity, and confinement of the field in very small mode volumes, resulting in high power densities, cavities of different geometries, supporting WGMs, have been extensively studied for more than four decades now. However, the efficient coupling to WGMs mostly rely on experimentally challenging schemes including prism coupling, optical fiber half coupling (OFHC) or free space coupling. This thesis consists of the excitation of silicon microsphere WGMs using an alternative coupling method: shallow waveguides fabricated by femtosecond laser inscription. The evanescent field coupling from the guided modes of the femtosecond micromachined glass and diamond waveguides has been used to excite microsphere WGMs. Furthermore, this thesis includes the excitation of a diamond sphere using an OFHC. Employment of diamond material in photonic applications is substantial, because among all materials, diamond exhibits unique optical properties such as its color centers, large band-gap, high Raman gain, as well as a unique crystal lattice, and robust physical properties. Utilizing diamond as an excitation waveguide material or the cavity material opens the way for combination of both diamond's and WGMs' unique properties for applications in electronics, quantum information processing, and sensing.