Lasing and intermode correlation of whispering gallery mode in dye-doped polystyrene microspheres

Abdalla M. Darwish; Michael J. Curley; Putcha Venkateswarlu; M. Moghbel; Mohamed A. Mahdi; Anup Sharma; K. X. He; L. Vanderhoff

doi:10.1117/12.256173

1 November 1996 Lasing and intermode correlation of whispering gallery mode in dye-doped polystyrene microspheres

Abdalla M. Darwish, Michael J. Curley, Putcha Venkateswarlu, M. Moghbel, Mohamed A. Mahdi, Anup Sharma, K. X. He, L. Vanderhoff

Author Affiliations +

Proceedings Volume 2852, Nonlinear Optical Properties of Organic Materials IX; (1996) https://doi.org/10.1117/12.256173
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

The advantage of organic materials like polystyrene is their plasticity so that they can be made into any shape. Polystyrene has a rather large refractive index of 1.58 and can be easily doped with the required laser dye and also can be made into spheres of the required size. Fabrication of microspheres was basically carried out by J. Vanderhoff and his assistants at Lehigh University. The host material in all of these samples is polystyrene. Microspheres doped with Bis-MSB, PPO and alpha-NPO dyes were studied with suitable lasers like UV, N₂ and XeCl excimer. We have observed enhanced emission and lasing action at certain wavelengths which correspond to the whispering gallery modes of polystyrene spheres. Characterization of the lasing process in microspheres with respect to their sizes will be presented. The 2D crystalline structure on a periodic array thin films of polystyrene microspheres has been studied by both diffraction and microscopic techniques and will be presented as well.

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Abdalla M. Darwish, Michael J. Curley, Putcha Venkateswarlu, M. Moghbel, Mohamed A. Mahdi, Anup Sharma, K. X. He, and L. Vanderhoff "Lasing and intermode correlation of whispering gallery mode in dye-doped polystyrene microspheres", Proc. SPIE 2852, Nonlinear Optical Properties of Organic Materials IX, (1 November 1996); https://doi.org/10.1117/12.256173

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