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Photonics Seminar: Kai Wang, Stanford University

Title: New paradigms of photonic state manipulation on synthetic platforms

Abstract – Photons, the particles of light, are ideal carriers of quantum and classical information. My research focuses on employing fundamental physics concepts and advanced photonics technology for the unconventional manipulation of photons in their intrinsic degrees of freedom, from polarization to spatial modes to frequency.

The first part of the talk will be on nanostructured metasurfaces for quantum photonics. I will show our experimental results that use metasurfaces for the interference, tomographic measurement, and nontrivial transformation of multiphoton quantum states encoded in the polarization degree of freedom.

The second part will focus on non-Hermitian topological photonics in synthetic dimensions. I will show how we implement lattice Hamiltonians with unprecedented flexibility using discrete frequency modes of photons in a dynamically modulated system. I will show how we judiciously use losses to achieve non-Hermitian topological invariants, from nontrivial winding numbers to braids/knots formed by the complex-energy non-Hermitian bands.

The last part of my talk will show where my works and expertises point to in the future. I will briefly share my visions and plans on developing scalable quantum interconnect and simulation platforms based on new paradigms of manipulation of multidimensional photonic states encoded in intrinsic degrees of freedom.

Bio – Kai Wang is currently a Postdoctoral Scholar in the Department of Electrical Engineering at Stanford University. Before Stanford, he received his PhD from The Australian National University in 2019. Prior to that, he obtained MSc from Friedrich-Schiller-Universität Jena and BE from Tianjin University. His research interests include quantum photonics, non-Hermitian topological photonics, and metasurfaces.


For more information about this hybrid event, please contact:

Diana Strickland

Photonics Initiative


Zoom Access>>>

Meeting ID: 810 5653 1420

Passcode: 116074


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Event Information

March 7, 2022
11:30 am - 12:30 pm
ASRC Auditorium
85 St. Nicholas Terrace
New York, NY 10031 United States
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