Emission properties of random lasers with scatterer distribution formed by optical trapping

Takashi Kaku; Naomichi Yokoi; Takashi Okamoto

doi:10.1117/12.3008339

20 September 2023 Emission properties of random lasers with scatterer distribution formed by optical trapping

Takashi Kaku, Naomichi Yokoi, Takashi Okamoto

Proceedings Volume 12606, Optical Manipulation and Structured Materials Conference; 126060M (2023) https://doi.org/10.1117/12.3008339
Event: Optics and Photonics International Congress, 2023, Yokohama, Japan

Abstract

A method to change the scatterer distribution of a random laser medium using the optical trapping technique is proposed. By focusing trapping beams into small regions of the scattering medium, some scattering particles are concentrated in those regions, causing inhomogeneous distribution of scatterers. We investigate the effect of the scatterer distribution formed by optical trapping on the emission spectrum of a random laser. Experimental results show that the spectral spike intensity of random lasers with trapped particles is higher than that for the random lasers without trapped particles. Furthermore, the spectral spike intensity depends on the power of the trapping spot. The relationship between the number and the intensity of spikes in the emission spectra shows a feature observed in other random lasers with inhomogeneous scatterer distributions.

Citation Download Citation

Takashi Kaku, Naomichi Yokoi, and Takashi Okamoto "Emission properties of random lasers with scatterer distribution formed by optical trapping", Proc. SPIE 12606, Optical Manipulation and Structured Materials Conference, 126060M (20 September 2023); https://doi.org/10.1117/12.3008339

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