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Biphoton engineering using modal spatial overlap on-chip
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DOI：10.1364/OL.471346.png)
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Abstract
En 中文
Photon pairs generated by spontaneous parametric down -conversion are essential for optical quantum information processing, in which the quality of biphoton states is crucial for the performance. To engineer the biphoton wave func-tion (BWF) on-chip, the pump envelope function and the phase matching function are commonly adjusted, while the modal field overlap has been considered as a constant in the frequency range of interest. In this work, by using modal coupling in a system of coupled waveguides, we explore the modal field overlap as a new degree of freedom for biphoton engineering. We provide design examples for on-chip gener-ations of polarization entangled photons and heralded single photons. This strategy can be applied to waveguides of dif-ferent materials and structures, offering new possibilities for photonic quantum state engineering. (c) 2022 Optica Publish-ing Group
Keywords:
QUANTUM
GENERATION
STATE
Journal
IF:
3.3
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