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Pseudospin Transverse Localization of Light in an Optical Disordered Spin-Glass Phase.
Shani Izhak1, Aviv Karnieli2,3, Ofir Yesharim1
1Tel Aviv University, School of Electrical Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv 69978, Israel.
Researchers discovered a new pseudospin localization phenomenon driven by disordered vectorial potentials, observed in nonlinear optics. This finding offers insights into spin transport and magnetic phase transitions.
Area of Science:
- Nonlinear Optics
- Condensed Matter Physics
- Quantum Transport
Background:
- Localization phenomena are typically linked to disordered scalar potentials.
- Disordered spin-glass magnetic phases involve complex spin dynamics.
Purpose of the Study:
- To predict and observe a universal pseudospin localization phenomenon driven by a disordered vectorial potential.
- To investigate the role of nonlinear coupling strength and disorder properties in this phenomenon.
Main Methods:
- Experimental observation in an optical analog of a disordered spin-glass magnetic phase.
- Utilizing a nonlinear photonic crystal with disorder in second-order nonlinear coupling.
- Monitoring the idler-signal light beam as a pseudospin current.
Main Results:
- Observed onset of pseudospin localization in the transverse plane of the idler-signal light beam.
- Demonstrated strong dependence of localization on nonlinear coupling strength (optical pump power).
- Detected decaying Rabi oscillations between idler and signal fields, indicating longitudinal decoherence.
Conclusions:
- The study reveals a novel pseudospin localization driven by vectorial disorder in nonlinear systems.
- Findings provide new insights into spin transport in disordered magnetic textures.
- Opens avenues for exploring magnetic phases and transitions using nonlinear optics.
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