中国物理B ›› 2002, Vol. 11 ›› Issue (11): 1179-1183.doi: 10.1088/1009-1963/11/11/315

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Lasing features of dye-doped pendant drops added with polymer particles: spectral blueshift and intensity enhancement

陈超华1, 李荣基1, 张曙2, 普小云3   

  1. (1)Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China; (2)Department of Physics, Yunnan University, Kunming 650091, China; (3)Department of Physics, Yunnan University, Kunming 650091, China; Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China
  • 收稿日期:2002-04-05 修回日期:2002-06-01 出版日期:2002-11-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10174060).

Lasing features of dye-doped pendant drops added with polymer particles: spectral blueshift and intensity enhancement

Pu Xiao-Yun (普小云)ab, Zhang Shu (张曙)a, Chan Chiu-Wah (陈超华)b, Lee Wing-Kee (李荣基)b    

  1. a Department of Physics, Yunnan University, Kunming 650091, China; b Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China
  • Received:2002-04-05 Revised:2002-06-01 Online:2002-11-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10174060).

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摘要： When micrometre-sized polymer particles were added into a dye-doped pendant drop that acted as a quasi-two-dimensional circular resonator, we found a blueshift of the peak wavelength of its lasing spectrum. The lasing output was also enhanced by the particles. The spectral blueshift was explained by a model of dye lasing in a circular cavity. The model includes losses of the scattering particles, medium absorption, and radiation leakage. An optimum particle density for maximum lasing output was deduced. The results are consistent with our experimental findings.

Abstract: When micrometre-sized polymer particles were added into a dye-doped pendant drop that acted as a quasi-two-dimensional circular resonator, we found a blueshift of the peak wavelength of its lasing spectrum. The lasing output was also enhanced by the particles. The spectral blueshift was explained by a model of dye lasing in a circular cavity. The model includes losses of the scattering particles, medium absorption, and radiation leakage. An optimum particle density for maximum lasing output was deduced. The results are consistent with our experimental findings.

Key words: pendant drop, polymer particle, spectral blueshift, intensity enhancement

中图分类号:  (Line and band widths, shapes, and shifts)

  • 33.70.Jg
33.70.Fd (Absolute and relative line and band intensities) 42.60.Da (Resonators, cavities, amplifiers, arrays, and rings) 34.50.Bw (Energy loss and stopping power) 42.55.Mv (Dye lasers)