KIM FOOK LEE |
RESEARCH |
Entanglement Properties of Magneto-Optics Media
We are interested in studying spectral properties and transverse phase-space profile of correlated/entangled photon pairs generated in a magneto-optics media and waveguide. The research could provide detailed studies of spectral influences on many bipartite polarization and path entanglement. The advances of nano-technology in fabrication and atto-second light source in light manipulation motivate the possibilities of implementing practical quantum information and schemes in an optical chip. Magneto-Optics effect and waveguide confinement can yield net anomalous group-velocity dispersion and enable four-wave mixing process. Four-photon scattering (FPS) in a waveguide has proven to be an essential nonlinear process for providing both non-degenerate and degenerate telecom-band photon pairs in many proofs of principle experiments. Briefly, two pump photons at frequency ωo scatter through the four-photon scattering to create signal (ωs) and idler (ωi) photons, such that 2 ωo = ωs + ωi and 2 ko = k2 + ki. This process is always referred to as non-degenerate FPS. While in the reverse degenerate FPS, one pump photon at signal frequency (ωs) and one pump photon at idler frequency (ωi) will annihilate together to create two degenerate photon-pair at frequency (ωo). For practical quantum communication, non-degenerate correlated/entangled photon-pairs are desirable for entanglement distribution in a wavelength-division multiplexing (WDM) environment, and enabling parallel multi-users access.
Quantum Communication and Computing using Non-Classical Light |
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