Free-carrier-induced soliton fission unveiled by in situ measurements in nanophotonic waveguides
- Univ. of Sydney, NSW (Australia); Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
- FOM Institute AMOLF, Science Park (Amsterdam); Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
- Univ. of Sydney, NSW (Australia)
- Thales Research and Technology, Palaiseau (France)
- FOM Institute AMOLF, Science Park (Amsterdam)
Solitons are localized waves formed by a balance of focusing and defocusing effects. These nonlinear waves exist in diverse forms of matter yet exhibit similar properties including stability, periodic recurrence and particle-like trajectories. One important property is soliton fission, a process by which an energetic higher-order soliton breaks apart due to dispersive or nonlinear perturbations. Here we demonstrate through both experiment and theory that nonlinear photocarrier generation can induce soliton fission. Using near-field measurements, we directly observe the nonlinear spatial and temporal evolution of optical pulses in situ in a nanophotonic semiconductor waveguide. We develop an analytic formalism describing the free-carrier dispersion (FCD) perturbation and show the experiment exceeds the minimum threshold by an order of magnitude. We confirm these observations with a numerical nonlinear Schrodinger equation model. Finally, these results provide a fundamental explanation and physical scaling of optical pulse evolution in free-carrier media and could enable improved supercontinuum sources in gas based and integrated semiconductor waveguides.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1258598
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Vol. 7; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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