Advanced dispersion engineering of a III-Nitride micro-resonator for a blue/UV frequency comb
Abstract
A systematic dispersion engineering approach is presented toward designing a III-Nitride micro-resonator for a blue/UV frequency comb. The motivation for this endeavor is to fill the need for compact, coherent, multi-wavelength photon sources that can be paired with, e.g., the ion in a photonic integrated chip for optical sensing, time-keeping, and quantum computing applications. The challenge is to overcome the normal material dispersion exhibited by the otherwise ideal i.e., low-loss and large-Kerr-coefficient) AlGaN family of materials, as this is a prerequisite for bright-soliton Kerr comb generation. The proposed approach exploits the avoided-crossing phenomenon in coupled waveguides to achieve strong anomalous dispersion in a desired wavelength range. The resulting designs reveal a wide range of dispersion response tunability, and are realizable with the current state-of-the-art growth and fabrication methods for AlGaN semiconductors. Numerical simulations of the spatio-temporal evolution of the intra-cavity field under continuous-wave laser pumping indicate that such a structure is capable of generating a broadband blue/UV bright-soliton Kerr frequency comb.
Keywords
Cite
@article{arxiv.2006.07391,
title = {Advanced dispersion engineering of a III-Nitride micro-resonator for a blue/UV frequency comb},
author = {Ali Eshaghian Dorche and Dogan Timucin and Krishnan Thyagarajan and Thomas Wunderer and Noble Johnson and David Schwartz},
journal= {arXiv preprint arXiv:2006.07391},
year = {2020}
}