Now showing items 1-13 of 13

    • Application of self-assembled hemispherical microlasers as gas sensors 

      Ta, Van Duong; Chen, R.; Nguyen, D. M.; Sun, Handong (2013)
      Dye-doped hemispherical resonators are self-assembled on a distributed Bragg reflector based on hydrophobic effect. The size of hemispheres can be well-controlled with diameters ranging from 5 to 150 um. Upon optical ...
    • Blue liquid lasers from solution of CdZnS/ZnS ternary alloy quantum dots with quasi-continuous pumping 

      Wang, Yue; Leck, Kheng Swee; Ta, Van Duong; Chen, Rui; Nalla, Venkatram; Gao, Yuan; He, Tingchao; Demir, Hilmi Volkan; Sun, Handong (2014)
      A blue (ca. 440 nm) liquid laser with an ultra-low threshold through which quasi-continuous wave pumping is accessible is achieved by engineering unconventional ternary CdZnS/ZnS alloyed-core/shell QDs. Such an achievement ...
    • Coupled polymer microfiber lasers for single mode operation and enhanced refractive index sensing 

      Ta, Van Duong; Chen, Rui; Sun, Handong (2013)
      Single mode lasing operation is obtained from coupled whispering gallery mode polymer fiber lasers via the Vernier effect. This coupled structure offers a significant improvement in sensitivity (∼400 nm/refractive index ...
    • Flexible microresonators : lasing and sensing 

      Ta, Van Duong; Chen, Rui; Sun, Handong (2014)
      Microresonators have drawn a great deal of interest for their importance in both practical applications and fundamental physics in light-matter interaction. The optical confinement provided by a microresonator greatly ...
    • Microlaser from self-assembled hemispherical resonator 

      Ta, Van Duong; Chen, Rui; Sun, Handong (2012)
      High quality Whispering Gallery Mode lasing from dye-doped hemispherical microresonator formed by hydrophobic effect is presented. Owing to a simple fabrication, doping flexibility, our finding boosts a convenient ...
    • Multicolor hybrid upconversion nanoparticles and their improved performance as luminescence temperature sensors due to energy transfer 

      Chen, Rui; Ta, Van Duong; Xiao, Fen; Zhang, Qinyuan; Sun, Handong (2013)
      By combining upconversion nanoparticles (UCNPs) with rhodamine 6G (R6G) dye molecules, multicolor emission based on energy transfer is achieved. The complexes can be dissolved in epoxy resin, and self-assembled hemispherical ...
    • Multicolor lasing prints 

      Ta, Van Duong; Yang, Shancheng; Wang, Yue; Gao, Yuan; He, Tingchao; Chen, Rui; Demir, Hilmi Volkan; Sun, Handong (2015)
      This work demonstrates mass production of printable multi-color lasing microarrays based on uniform hemispherical microcavities on a distributed Bragg reflector using inkjet technique. By embedding two different organic ...
    • Observation of polarized gain from aligned colloidal nanorods 

      Gao, Yuan; Ta, Van Duong; Zhao, Xin; Wang, Yue; Chen, Rui; Mutlugun, Evren; Fong, Kah Ee; Tan, Swee Tiam; Dang, Cuong; Sun, Xiao Wei; Sun, Handong; Demir, Hilmi Volkan (2015)
      In recent years, colloidal semiconductor nanorods have attracted great interest for polarized spontaneous emission. However, their polarized gain has not been possible to achieve so far. In this work we show the highly ...
    • Reconfigurable liquid whispering gallery mode microlasers 

      Yang, Shancheng; Ta, Van Duong; Wang, Yue; Chen, Rui; He, Tingchao; Demir, Hilmi Volkan; Sun, Handong (2016)
      Engineering photonic devices from liquid has been emerging as a fascinating research avenue. Reconfigurably tuning liquid optical micro-devices are highly desirable but remain extremely challenging because of the fluidic ...
    • Self-assembled flexible microlasers 

      Ta, Van Duong; Chen, Rui; Sun, Handong (2012)
      Hemispherical microresonators with tunable sizes are obtained based on the hydrophobic effect on distributed Bragg reflectors. Under optical excitation, whispering gallery mode lasing is observed from the dye-doped ...
    • Single mode lasing from hybrid hemispherical microresonators 

      Chen, Rui; Ta, Van Duong; Sun, Handong (2012)
      Enormous attention has been paid to optical microresonators which hold a great promise for microlasers as well as fundamental studies in cavity quantum electrodynamics. Here we demonstrate a three-dimensional (3D) hybrid ...
    • Stimulated emission and lasing from CdSe/CdS/ZnS core-multi-shell quantum dots by simultaneous three-photon absorption 

      Wang, Yue; Ta, Van Duong; Gao, Yuan; He, Ting Chao; Chen, Rui; Mutlugun, Evren; Demir, Hilmi Volkan; Sun, Han Dong (2014)
      Three-photon pumped stimulated emission and coherent random lasing from colloidal CdSe/CdS/ZnS core-multi-shell quantum dots are achieved for the first time. Our results could offer new possibilities in biology and photonics ...
    • Tuning whispering gallery mode lasing from self-assembled polymer droplets 

      Ta, Van Duong; Chen, Rui; Sun, Handong (2013)
      Optical microcavities are important for both fundamental studies of light-matter interaction and applications such as microlasers, optical switches and filters etc... Tunable microresonators, in which resonant modes can ...