EE Student Information

OSA/SPIE, SPRC and Ginzton Lab present "Frequency comb-based nonlinear spectroscopy"

Frequency comb-based nonlinear spectroscopy
Wednesday, June 12, 2019 - 4:15pm
Allen 101X
Bachana Lomsadze (Santa Clara University)
Abstract / Description: 

Rapid and precise measurements are and always have been of interest in science and technology partly because of their numerous practical applications. Since their development, frequency comb-based methods have revolutionized optical measurements. They simultaneously provide high resolution, high sensitivity, and rapid acquisition times. These methods are being developed for use in many fields, from atomic and molecular spectroscopy, to precision metrology, to spectral LIDAR and even atmospheric monitoring. However they cannot address the issues of inhomogeneously broadened transitions or sample heterogeneity. This is especially important for remote chemical sensing applications.

In this talk I will discuss a novel optical method, that I recently developed, which overcomes these limitations. I will demonstrate its capabilities for probing extremely weak fundamental processes as well as its applications for rapid and high resolution chemical sensing.



B. Lomsadze, B. Smith and S. T. Cundiff. "Tri-comb spectroscopy". Nature Photonics 12, 676, 2018.
B. Lomsadze and S. T. Cundiff. "Frequency-comb based double-quantum two-dimensional spectrum identifies collective hyperfine resonances in atomic vapor induced by dipole-dipole interactions." Physical Review Letters 120, 233401, 2018.
B. Lomsadze and S. T. Cundiff. "Frequency combs enable rapid and high-resolution multidimensional coherent spectroscopy". Science 357, 1389, 2017
B. Lomsadze and S. T. Cundiff. "Frequency comb-based four-wave-mixing spectroscopy". Optics letters 42, 2346, 2017


Bachana Lomsadze is a tenure-track professor of Physics at Santa Clara University. His research is focused on studying light-matter interactions and ultrafast dynamics of atomic/molecular systems and semiconductor nanostructures using frequency combs and multidimensional coherent spectroscopy. He received his Doctorates degree in Physics from Kansas State University (James R. Macdonald Laboratory). He studied coherent control of cold and trapped atomic and molecular systems. After graduation he was a joint post-doctoral researcher at JILA and the University of Colorado and then a research fellow at the University of Michigan. His work at Santa Clara University focuses on using the Nobel-Prize-Winning technology of optical frequency combs to study light-matter interactions and ultrafast dynamics in atomic/molecular systems (cold and Doppler broadened) and semiconductor nanostructures.