
1.Department of Physics and Astronomy, University of Sheffield, Sheffield, S3 7RH, UK
2.Department of Physics, University of Bath, Bath, BA2 7AY, UK
3.ITMO University, Kronverksky Avenue 49, St. Petersburg, 197101, Russia
4.Department of Physics, Lancaster University, Lancaster, LA1 4YB, UK
5.Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield, S3 7HQ, UK
6.Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, UK
Paul M. Walker (p.m.walker@sheffield.ac.uk)
Published:2019,
Published Online:16 January 2019,
Received:08 August 2018,
Revised:24 December 2018,
Accepted:24 December 2018
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Walker, P. M. et al. Spatiotemporal continuum generation in polariton waveguides. Light: Science & Applications, 8, 94-104 (2019).
Walker, P. M. et al. Spatiotemporal continuum generation in polariton waveguides. Light: Science & Applications, 8, 94-104 (2019). DOI: 10.1038/s41377-019-0120-7.
We demonstrate the generation of a spatiotemporal optical continuum in a highly nonlinear exciton–polariton waveguide using extremely low excitation powers (2-ps
100-W peak power pulses) and a submillimeter device suitable for integrated optics applications. We observe contributions from several mechanisms over a range of powers and demonstrate that the strong light–matter coupling significantly modifies the physics involved in all of them. The experimental data are well understood in combination with theoretical modeling. The results are applicable to a wide range of systems with linear coupling between nonlinear oscillators and particularly to emerging polariton devices that incorporate materials
such as gallium nitride and transition metal dichalcogenide monolayers that exhibit large light–matter coupling at room temperature. These open the door to low-power experimental studies of spatiotemporal nonlinear optics in submillimeter waveguide devices.
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