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Award ID contains: 2337595

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  1. ; ; ; ; ; (, Laser Physics Letters)
    A liquid-core (LiCo) dye laser was demonstrated using Rhodamine B (RhB) dissolved in glycerol as the gain medium and fluorinated ethylene propylene (FEP) tubing as the waveguide. Photoluminescence and amplified spontaneous emission studies identified optimal RhB concentrations of 0.1 wt.% and 0.3 wt.% for low-threshold laser operation. Laser emission was achieved in LiCo rods with 1/16″ and 1/32″ inner diameter FEP tubing, with narrower tubing providing enhanced mode confinement and spectral narrowing. The addition of cavity mirrors improved emission coherence, revealing a distinct laser mode at low pump energies with mode spacing inconsistent with a simple Fabry-Pérot cavity, indicating complex mode coupling and internal reflections. Limitations include spectral broadening and scattering-induced parasitic feedback, which suggest avenues for further optimization in waveguide materials and output coupling. 
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    Free, publicly-accessible full text available November 1, 2026
  2. ; ; ; ; ; (, Applied Optics)
    An apparatus that records the optical spectrum of emissive materials as a function of polar coordinate angles is reported. The ability of the device to characterize the directive gain of a light source over the optical spectrum is demonstrated. The angular emission profile of an electrically driven LED with a hemispherical diffuser cap was measured. In addition, the device was used to characterize optically pumped materials exhibiting both fluorescence and amplified spontaneous emission, demonstrating its versatility for diverse emissive systems. 
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  3. ; ; ; ; (, Scientific Reports)
  4. (, Mendeley Data)
    Emission spectra from Brown and Yellow regions in peafowl tail feathers infused with rhodamine 6g in an 70% ethanol, 30% water solution 
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  5. ; ; ; ; (, Journal of the Optical Society of America B)
    Iridophore networks in the skin of neon tetra fish are investigated for use as biologically sourced, tunable, Bragg reflector arrays. This paper reports on a method for immediate and fast post-processing of tissue to modify the structural color of iridophores found in the lateral color stripe. Conditions for fixation, as well as the environment post-fixation to improve longevity of the structural color, are also presented. Recent results from attempts to further increase the lifetime of post-mortem iridophore color through infiltration and embedding in low-acid glycol methacrylate are also discussed. 
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  6. ; ; ; ; (, Journal of Optical Microsystems)
    Full Text Available