Academic Events

Physics Colloquium: Manipulation of non-orthogonal polarization states via optical metasurfaces for classical and quantum applications

Name: Physics Colloquium: Manipulation of non-orthogonal polarization states via optical metasurfaces for classical and quantum applications
Start: 2023-05-02T15:15:00-04:00
End: 2023-05-02T16:30:00-04:00
Location: Regents Hall, Room 109

Prof. Mu Wang, Nanjing University and APS Editorial Office

Abstract: Polarization as one of the crucial features of light plays a vital role in applications of nanophotonics and quantum information. Conventionally, a photonic system consists of many elements like prisms, beam splitters, and wave plates to generate, distribute, and multiplex the multiple polarization states. These optical elements, however, are heavy and bulky and do not meet the requirements for the future integration and miniaturization of photonics and quantum information networks. Metasurface, a 2D optical device made of artificially designed periodic subwavelength structures, may solve these issues. Even so, simultaneously generating different types of polarization states with a single piece of metasurface remained challenging until very recently, whereas different types of polarization states are essential for quantum cryptography, quantum teleportation, quantum key distribution, etc. In this talk, with some new strategies, I will talk about our recent studies on the generation, distribution, and multiplex of multiple polarization states via optical dielectric metasurfaces.

References:
[1] Y.-J. Gao, X. Xiong, Z. Wang, F. Chen, R.-W. Peng, and M. Wang, Simultaneous generation of arbitrary assembly of polarization states with geometrical-scaling-induced phase modulation, Phys. Rev. X, 10, 031035 (2020)
[2] Y.-J. Gao, Z. Wang, W. Tang, X. Xiong, Z. Wang, F. Chen, R.-W. Peng, and M. Wang, Metasurface design for the generation of an arbitrary assembly of different polarization states, Phys. Rev. B, 104, 12541 (2021)
[3] Y.-J. Gao, Z. Wang, Y. Jiang, R.-W. Peng, Z.-Y. Wang, D.-X. Qi, R.-H. Fan, W.-J. Tang, and M. Wang, Multichannel distribution and transformation of entangled photons with dielectric metasurfaces, Phys. Rev. Lett., 129, 023601 (2022)
[4] B. Xiong, Y. Liu, Y. Xu, L. Deng, C.-W. Chen, J.-N. Wang, R. W. Peng, Y. Lai, Y. Liu, and Mu Wang, Breaking the limitation of polarization multiplexing in optical metasurfaces with engineered noise, Science, 379, 294-299 (2023)