Near-infrared to ultra-violet frequency conversion in chalcogenide metasurfaces.
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2021-10-05
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Abstract
Chalcogenide photonics offers unique solutions for a broad range of applications from mid-infrared sensing to integrated, ultrafast, ultrahigh-bandwidth signal processing. However, to date its usage has been limited to the infrared part of the electromagnetic spectrum, thus avoiding ultraviolet and visible ranges due to absorption of chalcogenide glasses. Here, we experimentally demonstrate and report near-infrared to ultraviolet frequency conversion in an As2S3-based metasurface, enabled by a phase locking mechanism between the pump and the inhomogeneous portion of the third harmonic signal. Due to the phase locking, the inhomogeneous component co-propagates with the pump pulse and encounters the same effective dispersion as the infrared pump, and thus experiences little or no absorption, consequently opening previously unexploited spectral range for chalcogenide glass science and applications, despite the presence of strong material absorption in this range.
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Gao, Jiannan, Maria Antonietta Vincenti, Jesse Frantz, Anthony Clabeau, Xingdu Qiao, Liang Feng, Michael Scalora, Natalia M Litchinitser, et al. (2021). Near-infrared to ultra-violet frequency conversion in chalcogenide metasurfaces. Nature communications, 12(1). p. 5833. 10.1038/s41467-021-26094-1 Retrieved from https://hdl.handle.net/10161/24726.
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Natalia Litchinitser
Litchinitser holds a Ph.D. Electrical Engineering from the Illinois Institute of Technology. Her primary focus is on metamaterials that manipulate the visible portion of the electromagnetic spectrum. Litchinitser began her work with metamaterials as a research scientist at the University of Michigan, and joined the faculty at the University of Buffalo in 2008. Over the next decade, she became one of the leading experts in optical metamaterials. Currently, Litchinitser’s research focuses on topological photonics, which seek to direct light around tight corners using tiny waveguides that prevent photons from scattering. She is Fellow of the American Physical Society (APS), a Fellow of the Optical Society of America (OSA), and a Senior Member of the Institute of Electrical and Electronics Engineers (IEEE).
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