Plasmonic random lasers have drawn significant attention recently due to their versatility, low threshold, and the possibility of achieving tunable and coherent/incoherent outputs. However, in this Letter, the phenomenon of replica symmetry breaking is reported in intensity fluctuations of a rarely used colloidal plasmonic random laser (RL) illumination. Triangular nanosilver scatter particles produced incoherent RL action when used in a dimethylformamide (DMF) environment in a Rhodamine-6G gain medium. The use of gold-coated triangular nanosilver as the scatterer in place of triangular nanosilver offered a dual contribution of scattering and lower photo-reabsorption, which caused a reduction in the lasing threshold energy of 39% compared to that obtained with the latter. Further, due to its long-term photostability and chemical properties, a phase transition from the photonic paramagnetic to the glassy phase is observed experimentally in the RL system used. Interestingly, the transition occurs at approximately the lasing threshold value, which is a consequence of stronger correlation of modal behaviors at high input pump energies. (c) 2023 Optica Publishing Group

Dey, A., Pramanik, A., Mondal, K., Biswas, S., Chatterjee, U., Messina, F., et al. (2023). Replica symmetry breaking in a colloidal plasmonic random laser with gold-coated triangular silver nanostructures. OPTICS LETTERS, 48(15) [10.1364/ol.493987].

Replica symmetry breaking in a colloidal plasmonic random laser with gold-coated triangular silver nanostructures

Pramanik, Ashim;Messina, Fabrizio;
2023-07-31

Abstract

Plasmonic random lasers have drawn significant attention recently due to their versatility, low threshold, and the possibility of achieving tunable and coherent/incoherent outputs. However, in this Letter, the phenomenon of replica symmetry breaking is reported in intensity fluctuations of a rarely used colloidal plasmonic random laser (RL) illumination. Triangular nanosilver scatter particles produced incoherent RL action when used in a dimethylformamide (DMF) environment in a Rhodamine-6G gain medium. The use of gold-coated triangular nanosilver as the scatterer in place of triangular nanosilver offered a dual contribution of scattering and lower photo-reabsorption, which caused a reduction in the lasing threshold energy of 39% compared to that obtained with the latter. Further, due to its long-term photostability and chemical properties, a phase transition from the photonic paramagnetic to the glassy phase is observed experimentally in the RL system used. Interestingly, the transition occurs at approximately the lasing threshold value, which is a consequence of stronger correlation of modal behaviors at high input pump energies. (c) 2023 Optica Publishing Group
31-lug-2023
Settore FIS/01 - Fisica Sperimentale
Dey, A., Pramanik, A., Mondal, K., Biswas, S., Chatterjee, U., Messina, F., et al. (2023). Replica symmetry breaking in a colloidal plasmonic random laser with gold-coated triangular silver nanostructures. OPTICS LETTERS, 48(15) [10.1364/ol.493987].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/635878
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