Name:
Ujjal Chettri
Institute:
Ecole Centrale de Lyon, Lyon, France
Nationality:
Indian
Academic Background:
2019-2022, Bachelor of Science (Honors) in Physics, Sri Sathya Sai Institute of Higher Learning, India
2022-2024, Master of Science in Physics, Sri Sathya Sai Institute of Higher Learning, India
May, 2024 – July, 2024, Internship at Tata Institute of Fundamental Research, Hyderabad, India
Ph.D topic:
My research topic is titled “Mid-Infrared microcombs in CMOS-based platforms”. A microcomb is an optical frequency comb generated on a micro-engineered chip. A ring with a radius of a hundredth of a millimeter acts as a parametric oscillator when pumped with a continuous wave laser. Thus, the power in the ring builds up enabling four-wave mixing and therefore a spectrum of new frequencies is generated. Mid-IR becomes an interesting regime, especially for group IV photonics because of the large transparency window. In my course of this Ph.D, I will study various materials and engineer its dispersion by tailoring waveguide shape and dimension to generate broadband microcombs at mid-IR wavelengths for its application to spectroscopy. The goal is to achieve a mid-IR integrated frequency comb in the 3 to 5 µm and 8 to 10 µm range
Contact:
ujjal.chettri@ec-lyon.fr