Title page for etd-0814112-100601


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URN etd-0814112-100601
Author Yu-Han Kao
Author's Email Address No Public.
Statistics This thesis had been viewed 5351 times. Download 307 times.
Department Physics
Year 2011
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Studies of the surface treatment effect for cholesteric blue phase liquid crystals lasers
Date of Defense 2012-07-19
Page Count 73
Keyword
  • blue phase
  • liquid crystal laser
  • photonic crystal
  • Bragg reflection
  • Abstract In this study, we study three kinds of surface treatments in the blue phase lasers. Three kinds of surface treatments include no surface treatment, homogeneous alignment ,HA, and vertical alignment ,VA. Blue Phase liquid crystal is a three-dimensional photonic crystal, and it can be used to be a laser cavity. When the blue phase doped with a laser dye, a laser emission can be observed under appropriate pumping energy. In the first part, we fabricate the blue phase lasers with three kinds of surface, there are different surface treatments to study the surface effect of the optoelectronic properties. It is found that the threshold pumping power is significantly decreased under a surface treatment on glass substrate. In the second part, we change cooling rate in the formation of the blue phase liquid crystals, and study the optoelectronic properties of blue phase lasers. The experiment results reveal that the slower cooling rate leads to a order blue phase substrate, resulting in a lower threshold pumping energy of the blue phase laser.
    Advisory Committee
  • Chie-Tong Kuo - chair
  • Chi-Yen Huang - co-chair
  • Chi-Huang Lin - advisor
  • Files
  • etd-0814112-100601.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2012-08-14

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