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Proceedings Paper

Lasing and intermode correlation of whispering gallery mode in dye-doped polystyrene microspheres
Author(s): Abdalla M. Darwish; Michael J. Curley; Putcha Venkateswarlu; M. Moghbel; Mohamed A. Mahdi; Anup Sharma; K. X. He; L. Vanderhoff
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Paper 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.

Paper Details

Date Published: 1 November 1996
PDF: 12 pages
Proc. SPIE 2852, Nonlinear Optical Properties of Organic Materials IX, (1 November 1996); doi: 10.1117/12.256173
Show Author Affiliations
Abdalla M. Darwish, Alabama A&M Univ. (United States)
Michael J. Curley, Alabama A&M Univ. (United States)
Putcha Venkateswarlu, Alabama A&M Univ. (United States)
M. Moghbel, Alabama A&M Univ. (United States)
Mohamed A. Mahdi, Alabama A&M Univ. (United States)
Anup Sharma, Alabama A&M Univ. (United States)
K. X. He, Alabama A&M Univ. (United States)
L. Vanderhoff, Lehigh Univ. (United States)

Published in SPIE Proceedings Vol. 2852:
Nonlinear Optical Properties of Organic Materials IX
Gustaaf R. Moehlmann, Editor(s)

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