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000605790 0247_ $$2arXiv$$aarXiv:2404.15712
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000605790 037__ $$aPUBDB-2024-01530
000605790 041__ $$aEnglish
000605790 088__ $$2arXiv$$aarXiv:2404.15712
000605790 1001_ $$0P:(DE-H253)PIP1099782$$aFan, Weichen$$b0
000605790 245__ $$aSupercontinua from integrated gallium nitride waveguides
000605790 260__ $$c2024
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000605790 520__ $$aSupercontinua are broadband spectra that are essential to optical spectroscopy, sensing, imaging, and metrology. They are generated from ultrashort laser pulses through nonlinear frequency conversion in fibers, bulk media and chip-integrated waveguides. For any generating platform, balancing the oppositional criteria of strong nonlinearity, transparency, and absence of multiphoton absorption is a key challenge.Here, we explore supercontinuum generation in integrated gallium nitride (GaN) waveguides, which combine a high Kerr-nonlinearity, mid-infrared transparency and a large bandgap that prevents two- and three-photon absorption in the technologically important telecom C-band where compact erbium-based pump lasers exist. With such a laser, we demonstrate tunable dispersive waves and gap-free spectra extending to almost 4 µm in wavelength, relevant to functional group chemical sensing.In addition, also leveraging the material’s second-order nonlinearity, we implement on-chip f-2f interferometry to detect the pump laser's carrier-envelope offset frequency, which enables precision metrology. These results demonstrate the versatility of GaN-on-sapphire as a new platform for broadband nonlinear photonics.
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000605790 536__ $$0G:(EU-Grant)853564$$aSTARCHIP - Microphotonics-based frequency combs for habitable exoplanet detection (853564)$$c853564$$fERC-2019-STG$$x1
000605790 536__ $$0G:(DE-HGF)2019_VH-NG-1404$$aVH-NG-1404 - Ultra-fast nonlinear microphotonics (G:(DE-HGF)2019_VH-NG-1404)$$cG:(DE-HGF)2019_VH-NG-1404$$x2
000605790 536__ $$0G:(EU-Grant)101046920$$aiSenseDNA - Computation driven development of novel vivo-like-DNA-nanotransducers for biomolecules structure identification (101046920)$$c101046920$$fHORIZON-EIC-2021-PATHFINDEROPEN-01$$x3
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000605790 650_7 $$2Other$$aOptics (physics.optics)
000605790 650_7 $$2Other$$aFOS: Physical sciences
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000605790 7001_ $$0P:(DE-H253)PIP1094475$$aLudwig, Markus$$b1
000605790 7001_ $$0P:(DE-HGF)0$$aRousseau, Ian$$b2
000605790 7001_ $$0P:(DE-HGF)0$$aArabadzhiev, Ivo$$b3
000605790 7001_ $$0P:(DE-H253)PIP1094526$$aRuhnke, Bastian$$b4
000605790 7001_ $$0P:(DE-H253)PIP1094154$$aWildi, Thibault$$b5
000605790 7001_ $$0P:(DE-H253)PIP1092814$$aHerr, Tobias$$b6$$eCorresponding author
000605790 773__ $$a10.48550/ARXIV.2404.15712
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