Nonlinear Nanoresonators for Bell State Generation

Abstract

Entangled photon states are a fundamental resource for optical quantum technologies and investigating the fundamental predictions of quantum mechanics. Up to now such states are mainly generated in macroscopic nonlinear optical systems with elaborately tailored optical properties. In this theoretical work, we extend the understanding on the generation of entangled photonic states towards the nanoscale regime, by investigating the fundamental properties of photon-pair-generation in sub-wavelength nonlinear nanoresonators. Taking materials with Zinc-Blende structure as example, we reveal that such systems can naturally generate various polarization-entangled Bell states over a very broad range of wavelengths and emission directions, with little to no engineering needed. Interestingly, we uncover different regimes of operation, where polarization-entangled photons can be generated with dependence on or complete independence from the pumping wavelength and polarization, and the modal content of the nanoresonator. Our work also shows the potential of nonlinear nanoresonators as miniaturized sources of biphoton states with highly complex and tunable properties.

15 pages, 6 figures

References in corpus (8)

• Metasurfaces for Quantum Photonics
• Resonant Semiconductor Metasurfaces for Generating Complex Quantum States
• Spatially entangled photon-pairs from lithium niobate nonlocal metasurfaces
• Enhanced generation of non-degenerate photon-pairs in nonlinear metasurfaces
• Modal analysis of electromagnetic resonators: user guide for the MAN program
• Three-color Sagnac source of polarization-entangled photon pairs
• Directional emission of down-converted photons from a dielectric nano-resonator
• Symmetry-protection of multiphoton states of light

Cited by in corpus (9)

• Engineering Quantum Light Sources with Flat Optics
• Efficient photon-pair generation empowered by dual quasi-bound states in the continuum
• Quantum Imaging Using Spatially Entangled Photon Pairs from a Nonlinear Metasurface
• Directionally Tunable Co- and Counter-Propagating Photon Pairs from a Nonlinear Metasurface
• Enhanced photon-pair generation from a van der Waals metasurface
• How to use the dispersion in the ${\chi }^{(3)}$ tensor for broadband generation of polarization-entangled photons
• Enhanced Tunable Photon Pair Generation from Nonlinear Metasurface with Guided-Mode Cavity
• Fusion of atomic W-like states in cavity QED systems
• Generating $N00N$-states of surface plasmon-polariton pairs with a nanoparticle