Undergraduate Mathematics Seminar
Mathematical Modeling of Solid State Laser Refrigeration
Laser radiation has conventionally been used to cool dilute atomic vapors or the mechanical amplitude of oscillators with approaches based on Doppler cooling, electronic feedback, or cavity-induced radiation pressure. However, the direct laser refrigeration of an optomechanical resonator has remained a long-standing challenge. Optically refrigerating the lattice of an optical resonator promises to impact several fields including quantum sensors and radiation balanced lasers. In this talk I’ll share the first experimental report of the laser refrigeration of a semiconductor cantilever device [Pant et al., Nature Communications (2020)]. An incident laser with a wavelength of 1020 nm is used to cool the crystal. A temperature drop of 23.6 K below room temperature is recorded at a focused laser power of 40.1 mW. The presentation will provide a detailed overview of how analytical solutions to the heat transfer partial differential equation (PDE) can be used to provide valuable insights into the time scales involved in laser cooling, as well as the imaginary refractive index of the laser cooling crystal.
Peter Pauzauskie received BS degrees in Mathematics, Chemistry, and Chemical Engineering from Kansas State University in 2002 after pursuing undergraduate research in the chemistry laboratory of Prof. Ken Klabunde where he focused on understanding complex surface reactions between magnesium oxide nanocrystals and methyl iodide molecules.
After being recognized with the Barry M. Goldwater Scholarship and the National Science Foundation’s Graduate Research Fellowship he pursued a Ph.D. in physical chemistry with Prof. Peidong Yang (NAS) at the University of California, Berkeley where his dissertation focused on the synthesis, characterization, and optoelectronic integration of inorganic nanowires.
After graduating in 2007 he started a post-doc in the Chemical Sciences Division of the Lawrence Livermore National Laboratory as a DOE Lawrence Fellow under the direction of Dr. Joe H. Satcher, Jr. where he focused on the discovery and patenting of both diamond- and graphene- based carbon aerogel materials.
In 2010 Prof. Pauzauskie started as an assistant professor in the Materials Science & Engineering department at the University of Washington as was promoted to an Associate Professor with tenure in 2017. Prof. Pauzauskie also has a dual appointment in the Physical & Computational Sciences Directorate at the Pacific Northwest National Laboratory.
Peter has been recognized with an CAREER award from the National Science Foundation, a Young Investigator Award from the Air Force Office of Scientific Research, and was selected to participate in the 2015 joint US-German Frontiers of Engineering Symposium in Potsdam, Germany. In 2019, Peter was a visiting Gastprofessor (level W3) at Prof. Fedor Jelezko’s Institute for Quantum Optics in Ulm, Germany.
Dial-In Information
https://ksu.zoom.us/j/92789137479
Monday, August 31, 2020 at 1:30pm to 2:20pm
- Event Type
- Audience
- Department
- Homepage Calendar, Mathematics, Department of
- Subscribe
- Google Calendar iCal Outlook