At 2:30 pm on April 20, 2022, at the invitation of the School, Prof. Zhang Bin from Sun Yat-sen University delivered a special online academic report on "Kerr Optical Frequency Comb based on Integrated Micro-cavity on Chalcogenide Tablet". More than 200 faculty members and master and doctoral students attended the presentation.
The reporting expert Bin Zhang is an associate professor and PhD supervisor in the School of Electronics and Information Technology, Sun Yat-sen University. From 2012 to 2017, Prof. Zhang has been engaged in scientific research at Nanyang Technological University, The Australian National University and The Hong Kong Polytechnic University. In 2017, Prof. Zhang joined the School of Electronics and Information Technology of Sun Yat-sen University to conduct research on "intelligent photonic integrated devices and optical signal processing applications", carrying out research on on-chip integrated broadband light sources, microwave filters and other devices and high-precision optical signal detection and other applications. In the past 5 years, he has published more than 50 SCI papers such as Laser photonics review, and has undertaken many research projects such as major projects of the Ministry of Science and Technology, national defense projects, and the National Natural Science Foundation of China.
In his presentation, Prof. Zhang pointed out that nonlinear integrated photonics combines the advantages of current high-precision nanofabrication technologies and highly nonlinear optical platforms to significantly enhance the efficiency, bandwidth and coherence of nonlinear optics, revolutionizing the applications such as on-chip optical frequency combs, broadband Raman light sources and on-chip quantum photonics. Chalcogenide photonic materials and devices are widely used in broadband nonlinear photonics applications because of their advantages of ultra wideband transmission band, high Kerr nonlinearity and Raman effect, and low thermal optical coefficient.
Subsequently, Prof. Zhang introduced that based on the integrated micro and nano device processing platform of the National Key Laboratory of Optoelectronic Materials and Technologies of Sun Yat-sen University, the research group has established a nonlinear integrated photonics research platform covering "chalcogenide materials - high quality devices - system applications". Recently, based on the newly developed high-quality silicon-based chalcogenide photonic materials (Ge-Sb-S) platform, the group has conducted research in the area of low-energy, large-bandwidth and tunable on-chip nonlinear integrated light sources, and prepared on-chip integrated Ge-Sb-S microcyclic microcavities with a quality factor of about 5x106, which achieved ultra-low-threshold, highly integrated soliton optical frequency combs, Kerr-Raman optical frequency comb and ultra-large bandwidth cascaded Raman laser for tuned dispersion flexible switching, and a tunable optical parametric oscillation source of tuned energy dissipation in the near-octave range, providing a new robust nonlinear photonic platform and application demonstration for on-chip integrated nonlinear photonics.
Prof. Zhang Bin's presentation was very insightful, which inspired and benefited the participating teachers and students. After the presentation, Prof. Zhang had an in-depth academic exchange with the students and gave targeted answers to the questions raised by the students, which enlightened them. The online academic report exchange was a complete success!
