Kavli Affiliate: Wei Gao
| First 5 Authors: Hai-Jun Wu, Bing-Shi Yu, Zhi-Han Zhu, Wei Gao, Dong-Sheng Ding
| Summary:
Vectorial structured light with spatially varying amplitude, phase, and
polarization is reshaping many areas of modern optics, including nonlinear
optics, as diverse parametric processes can be used to explore interactions
between such complex vector fields, extending the frontiers of optics to new
physical phenomena. However, the most basic nonlinear application, i.e.,
frequency conversion, still remains challenging for vectorial structured light
since parametric processes are polarization dependent, leading to a change in
the spatial topological structure of signals. In this work, to break this
fundamental limit, we propose a novel conformal frequency conversion scheme
that allows to maintain the full spatial structure of vectorial structured
light in the conversion; and systematically examine its spatial polarization
independence based on non-degenerate sum-frequency generation with type-0 phase
matching. This proof-of-principle demonstration paves the way for a wide range
of applications requiring conformal frequency conversion, and, particularly, to
implement frequency interfaces with multimodal communication channels,
high-dimensional quantum states, and polarization-resolved upconversion
imaging.
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