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Observation of nonlinear disclination states
Boquan Ren1, Antonina A Arkhipova2,3, Yiqi Zhang4
1Key Laboratory for Physical Electronics and Devices, Ministry of Education, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
Light, Science & Applications
|August 9, 2023
Summary
Researchers experimentally observed nonlinear photonic disclination states in waveguide arrays. These robust states, controlled by power, offer new avenues for nonlinear topological physics and related condensates.
Area of Science:
- Topological photonics
- Nonlinear optics
- Condensed matter physics
Background:
- Topological insulators with disclinations host unique topological states.
- Previous studies focused solely on linear regimes, neglecting nonlinearity's role.
Purpose of the Study:
- To experimentally investigate nonlinear photonic disclination states.
- To explore the interplay between nonlinearity and topology in systems with disclinations.
Main Methods:
- Fabrication of waveguide arrays with pentagonal/heptagonal disclination cores using fs-laser writing.
- Observation of nonlinear photonic disclination states and their properties.
Main Results:
- Experimental observation of robust nonlinear disclination states bifurcating from linear counterparts.
- Control over spatial localization of topological states via optical power.
- Efficient excitation of nonlinear states by focusing Gaussian beams into the disclination core.
Conclusions:
- This work pioneers the study of nonlinear effects in topological systems with disclinations.
- Findings are relevant for Bose-Einstein condensates, polariton condensates, and advanced photonic devices.
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