OICC Press Journal of Theoretical and Applied Physics 2251-7235 19 1 2025 02 10 Temperature effects on the conversion coupling efficiency in dye-based plasmonic random laser gain media 1 6 10.57647/j.jtap.2025.1901.01 EN Mariam Kadhim Jawad Department of Laser Physics, College of Science for Women, University of Babylon, Hillah, Iraq  AND  Magneto-Plasmonic Lab, Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran https://orcid.org/0009-0009-1477-6874 Jassim Mohammed Jassim Department of Laser Physics, College of Science for Women, University of Babylon, Hillah, Iraq https://orcid.org/0000-0002-4106-0486 Saddam Flayeh Haddawi Department of Laser Physics, College of Science for Women, University of Babylon, Hillah, Iraq  AND  Magneto-Plasmonic Lab, Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran https://orcid.org/0000-0003-3555-9747 Seyedeh Mehri Hamidi Magneto-Plasmonic Lab, Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran https://orcid.org/0000-0002-5298-2224 Journal Article 2025 02 10 The impact of temperature on the conversion coupling efficiency between Rhodamine 6G (Rh6G) dye and hybrid nanoparticles, composed of gold (Au) and copper (Cu), and its influence on the performance of random lasers is investigated. The study focused on the interaction between the photophysical properties of Rh6G dye molecules and the plasmonic and thermal effects of Au/Cu nanoparticles (NPs) at varying temperatures. We analyzed the interaction between the dye molecules and nanoparticles as a function of pumping energy and temperature focusing on laser parameters laser threshold, full width at half maximum (FWHM), and peak intensity. Our results show that increasing pumping energy and temperature significantly affects the FWHM's narrowing, and peak intensity enhancement. We found that with increasing pumping energy, the FWHM narrowed to about 8 nm for Au and Cu nanoparticles, and the peak intensity was enhanced to about 40,000 a.u. for AuNPs and 28,000 a.u. for CuNPs. While, we found that with increasing temperature, the FWHM decreased to about 0.6 nm for AuNPs and 0.8 nm for CuNPs, and the peak intensity increased to about 5400 a.u. for AuNPs and 9400 a.u. for CuNPs. This study provides insight into optimizing random laser performance through temperature control, potentially advancing the development of tunable photonic devices.