[Physics-talks] Akira Ozawa AMO Seminar 5/7/25

[Leslie Martinez]

Just a reminder that you're invited to our upcoming *Physics and Astronomy
AMO Seminar*! We’re excited to have  Akira Ozawa, from Max-Planck-Institute
of Quantum Optics, Germany and Yokohama National University, Japan, who
will be giving a talk on: Extreme ultraviolet optical frequency combs and
applications.
------------------------------

*Date:* 5/7/2025
*Time:* 11:00 AM
*Location:* Physics Reading Room, 3035

*Speaker:*  Akira Ozawa
*Affiliation:*  Max-Planck-Institute of Quantum Optics, Germany

                    Yokohama National University, Japan

*Talk Title:* Extreme ultraviolet optical frequency combs and applications

*Abstract: *The extreme ultraviolet (XUV) frequency comb is an
indispensable tool for extending optical frequency metrology into the
unexplored wavelength range below 200 nm. With XUV frequency combs,
precision spectroscopy for fundamental physics, optical clocks and laser
cooling can be extended into the XUV regime for the first time. In this
talk, I will present the laser system for optical frequency comb generation
at extreme ultraviolet (XUV) wavelengths below 200 nm, which is designed
for precision spectroscopy of the 1S-2S two-photon transition in He+. The
spectroscopy is expected to serve as a precise test of fundamental theories
such as bound-state quantum electrodynamics (QED). Our recent efforts to
realize XUV frequency metrology using a miniaturized compact setup based on
XUV waveguides on microchip will also be discussed.
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