Precision metrology with atoms, electrons, and photons

By Shaun Burd, Stanford

  • Event Type: Seminar
  • Date and Time: 02/06/2023 3:00 pm - 02/06/2023 4:00 pm
  • Location: Willamette 240D
Special Day and Time

High performance optical frequency standards require engineering and controlling the relative motion between an atomic reference and the laser local oscillator.  I will describe a generic Doppler-free excitation protocol based on 3-photon excitation which may lead to significant reduction in the complexity of such standards while improving their noise performance.  Further improvements in noise performance can be achieved through the application of spin-squeezing methods.  I will discuss a method for generating squeezed states of ensembles of ultra-cold strontium atoms.  In the second part of the talk, I will describe our progress in developing ‘multi-passed’ electron and optical microscopes, where a sample is interrogated multiple times by a single probe. Multi-passing allows improved signal-to-noise ratio for a given radiation dose.   These methods could be extended to enable near interaction-free measurements in optical and electron microscopy.