[Joint CQSE & NCTS Seminar] Resolving 40-nm atomic spectra with 3-kHz resolution and by ONE 25-femtosecond laser-toward building up compact comb clocks

Title: [Joint CQSE & NCTS Seminar] Resolving 40-nm atomic spectra with 3-kHz resolution and by ONE 25-femtosecond laser-toward building up compact comb clocks
Speaker: Prof. Wang-Yau Cheng (National Central University)​​​​​​​
Time: 2026/3/13 (Fri.) 14:30-15:30​​​​​​​
Place: NCTS Physics Lecture Hall, 4F, Cosmology Hall, NTU
Online: https://nationaltaiwanuniversity-zbh.my.webex.com/nationaltaiwanuniversity-zbh.my/j.php?MTID=madb2c3b9d23a56faace3593823ecfdee
 

Abstract
The laser can be treated as a clock only if its frequency directly locked to some atomic transition. However, light shift is inevitable during photon-atom interaction, which degrades the accuracy of a clock. In this talk, I will present an excellent resolution of the “two-photon transition based direct comb laser spectroscopy”, showing you how we achieve “light-shift free” as 10^6 clocks are simultaneously built up.
 
Biography
1988  Bachelor degree from National Tsing-Hua University
1999  Ph.D. from National Tsing-Hua University
2000~2002  Postdoctoral researcher in JILA , Jun Ye-John Hall group
2002~2005  Assistant Professor, National Dong-Hua University
2005~2011  Assistant researcher, IAMS, Academia Sinica
2011~Now  Assisant, Associate, Full Professor, National Central University
2023.07~2023.12  Visiting Professor, Max Planck for Quantum Optics, Teothdor Hansch group

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