scholarly journals Intrinsic quality factor determination in whispering gallery mode microcavities using a single Stokes parameters measurement

2011 ◽  
Vol 19 (23) ◽  
pp. 23544 ◽  
Author(s):  
Francis Vanier ◽  
Cecilia La Mela ◽  
Ahmad Hayat ◽  
Yves-Alain Peter
Keyword(s):  
Quality Factor ◽  
Whispering Gallery Mode ◽  
Stokes Parameters ◽  
Whispering Gallery ◽  
Intrinsic Quality ◽  
Parameters Measurement

scholarly journals Whispering-Gallery-Mode for Coherent Random Lasing in a Dye-Doped Polystyrene Encapsulated Silica-Glass Capillary

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1578
Author(s):  
Kai Nie ◽  
Yueqi Wang ◽  
Zhenzhen Zhang ◽  
Gang Zou ◽  
Xiaolong Xu ◽  
...  
Keyword(s):  
Quality Factor ◽  
Silica Glass ◽  
Whispering Gallery Mode ◽  
Photonic Devices ◽  
Full Width ◽  
Random Lasing ◽  
Glass Capillary ◽  
New Approach ◽  
Whispering Gallery ◽  
532 Nm

Dye-doped polystyrene (DDPS) encapsulated in a silica-glass capillary with a diameter of 300 μm was fabricated through radical polymerization of styrene within the capillary. The coherent random lasing (RL) with full width at half maximum (FWHM) of 0.36 nm and a quality factor of 1608 was produced in the DDPS with the capillary when pumping at 532 nm. However, the incoherent RL with FWHM of 6.62 nm and a quality factor of 92 was produced in the DDPS without the capillary. A detailed investigation on this phenomenon by changing the diameter of the capillary and core refractive index (RI) reveals that there exists a strong whispering gallery mode (WGM) resonance in the capillary, which helps generate the coherent RL. The findings may open up a new approach for the fabrication of highly efficient photonic devices.

Boundary rounding effect in the hexagonal and oval two-dimensional optical microcavity

2021 ◽  
pp. 2150146
Author(s):  
Canran Zhang ◽  
Jun Dai
Keyword(s):  
Quality Factor ◽  
Whispering Gallery Mode ◽  
Circular Cavity ◽  
Structure Parameter ◽  
The Finite Element Method ◽  
Optical Mode ◽  
Optical Microcavity ◽  
Whispering Gallery ◽  
Mode Pattern ◽  
Simulation Results

In this paper, the boundary rounding effects of two types of non-circular GaN microcavity system are numerically simulated by the finite element method. When the rounding parameter [Formula: see text] of the hexagonal microcavity decreases, the six corners of the regular hexagon are gradually rounded, the results show that the optical mode gradually changes from the hexagonal whispering-gallery mode (WGM) to the perfect circular WGM, and the quality factor of the modes increases correspondingly. For the oval microcavity, the structure parameter [Formula: see text] increases from 0 to 1 when the oval microcavity gradually changes from a stadium cavity to a circular cavity. The simulation results show that the quality factor increases with [Formula: see text], and the optical mode changes from high-leak mode to WGM. Our results demonstrate the effect of the boundary rounding on the mode pattern and quality factor in hexagonal and oval microcavities.

Radiation Transfer in Whispering-Gallery Mode Microcavities

2005 ◽  
Author(s):  
Haiyong Quan ◽  
Zhixiong Guo
Keyword(s):  
Quality Factor ◽  
Energy Transport ◽  
Radiation Transfer ◽  
Free Spectral Range ◽  
Radiation Energy ◽  
Whispering Gallery Mode ◽  
Whispering Gallery ◽  
Waveguide Width ◽  
Scattering Spectra ◽  
Spectral Ranges

Micro/nanoscale radiation transfer in whispering-gallery mode (WGM) microcavities is investigated. Each cavity consists of a waveguide and a microdisk coupled in a planar chip. In order to characterize the WGM resonance phenomena, studies of configuration parameters, specifically the microdisk size, the gap distance separating the microdisk and waveguide, and the waveguide width are numerically conducted. The finite element method is used for solving Maxwell’s equations which govern the propagation of electromagnetic (EM) field and the radiation energy transport in the micro/nanoscale WGM structures. The EM fields and the radiation energy distributions in the microcavities are then obtained. The scattering spectra for three different microdisk sizes are also obtained; and through which the WGM resonant properties such as the quality factor, the full-width at half maximum (FWHM), the free spectral range, and the finesse of the resonant modes are analyzed. It is found that the resonant frequencies and their free spectral ranges are predominantly determined by the size of the microcavity; while the FWHM, finesse, and quality factor are strong functions of the gap.

scholarly journals Whispering-gallery-mode based CH3NH3PbBr3 perovskite microrod lasers with high quality factors

2017 ◽  
Vol 1 (3) ◽  
pp. 477-481 ◽  
Author(s):  
Kaiyang Wang ◽  
Shang Sun ◽  
Chen Zhang ◽  
Wenzhao Sun ◽  
Zhiyuan Gu ◽  
...  
Keyword(s):  
Quality Factor ◽  
Whispering Gallery Mode ◽  
High Quality Factor ◽  
Quality Factors ◽  
High Quality ◽  
Whispering Gallery

High-quality-factor whispering gallery mode lasers in CH3NH3PbBr3 perovskite microrod lasers.

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