Flexible ultrahighQ-factor bottle-like microcavity laser
| Autor: | Hai Zhu, Shan-Shan Yan, An Q. Chen, Shichen Su, Shuangpeng Wang, Yan Y. Wu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Active laser medium Acoustics and Ultrasonics Physics::Optics 02 engineering and technology 01 natural sciences law.invention Rhodamine 6G chemistry.chemical_compound law 0103 physical sciences 010306 general physics business.industry 021001 nanoscience & nanotechnology Condensed Matter Physics Laser Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Quantum dot Excited state Q factor Optoelectronics Whispering-gallery wave 0210 nano-technology business Lasing threshold |
| Zdroj: | Journal of Physics D: Applied Physics. 51:065107 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/1361-6463/aaa5c6 |
| Popis: | A comprehensive study on the whispering gallery mode (WGM) lasing characteristics of a rhodamine 6G (R6G)-based flexible bottle-like microcavity has been performed. The closed-loop WGMs excited inside the microcavity were found strongly confined along the radial direction. Thus, the spacing of ultralow loss lasing modes can be realized by controlling the diameter of the bottle-like microcavity. By studying the WGM lasing action, the dependence of lasing threshold and Q-factor on the radius of the microcavity was analyzed. The lasing threshold for the random gain medium was reduced under the influence of radial optical confinement by increasing diameter. In addition, the WGM lasing characteristics of the bottle-like microcavity were also explored by the three-dimensional finite-difference time-domain method. Our approach provides a solution scheme towards the research for lasing characteristic of novel nanocrystal fluorescence or quantum dot materials based on the flexible ultrahigh Q factor bottle-like microcavity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|