Ring Resonators Intergrating With Dichoric Materials And In Spin-valley Controlled Photonic Topological System
Photonic technology plays an important role in the development of diverse applications, ranging from optical telecommunications to sensing and imaging. The utilization of photonic circuits emerges as a promising platform for the establishment of advanced communication systems characterized by high speed and large capacity. This advancement is crucial to facilitate fast and efficient data transfer while concurrently managing multiple devices. It is imperative that essential components such as lasers, modulators, and isolators exhibit compactness without incurring significant losses. Non-reciprocal devices represent a valuable addition to photonic circuits, enabling the creation of unidirectional waveguides that function as optical isolators, preventing signals from the opposite direction. The conventional methodology for optical isolator involves the application of an external magnetic field to magneto-optical (MO) materials, yielding a substantial dichroic response within specific wavelength ranges. However, the reliance on external magnetic fields and the use of MO materials present challenges for miniaturization and fabrication in Complementary metal–oxide–semiconductor (CMOS) process. Simultaneously, the considerable circular dichroism exhibited by most ferrite materials in low loss regimes imposes limitations on their widespread applications. As an alternative approach for the dichroic materials, Transition Metal Dichalcogenides (TMDCs) Optically biased by a circularly polarized laser are suggested to give arise the nonreciprocal optical response. TMDCs are known to provide unique optical properties as two-dimensional materials taking advantage of miniaturization and fabrication process in CMOS platforms.
City University of New York - City College
Networked Digital Library of Theses and Dissertations