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.

scholarly journals High quality-factor whispering-gallery mode in the photonic crystal hexagonal disk cavity

2004 ◽  
Vol 12 (8) ◽  
pp. 1708 ◽  
Author(s):  
Han-Youl Ryu ◽  
Masaya Notomi ◽  
Guk-Hyun Kim ◽  
Yong-Hee Lee
Keyword(s):  
Photonic Crystal ◽  
Quality Factor ◽  
Whispering Gallery Mode ◽  
High Quality Factor ◽  
High Quality ◽  
Whispering Gallery

Hysteresis behavior of Kerr frequency comb generation in a high-quality-factor whispering-gallery-mode microcavity

2016 ◽  
Vol 55 (7) ◽  
pp. 072201 ◽  
Author(s):  
Takumi Kato ◽  
Akitoshi Chen-Jinnai ◽  
Takuma Nagano ◽  
Tomoya Kobatake ◽  
Ryo Suzuki ◽  
...  
Keyword(s):  
Quality Factor ◽  
Frequency Comb ◽  
Whispering Gallery Mode ◽  
High Quality Factor ◽  
High Quality ◽  
Hysteresis Behavior ◽  
Whispering Gallery ◽  
Comb Generation

scholarly journals Coherent suppression of backscattering in optical microresonators

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Andreas Ø. Svela ◽  
Jonathan M. Silver ◽  
Leonardo Del Bino ◽  
Shuangyou Zhang ◽  
Michael T. M. Woodley ◽  
...  
Keyword(s):  
Quality Factor ◽  
Bulk Material ◽  
Near Field ◽  
High Quality Factor ◽  
Dual Frequency ◽  
High Quality ◽  
Frequency Combs ◽  
Optical Microresonators ◽  
Whispering Gallery ◽  
The Stability

AbstractAs light propagates along a waveguide, a fraction of the field can be reflected by Rayleigh scatterers. In high-quality-factor whispering-gallery-mode microresonators, this intrinsic backscattering is primarily caused by either surface or bulk material imperfections. For several types of microresonator-based experiments and applications, minimal backscattering in the cavity is of critical importance, and thus, the ability to suppress backscattering is essential. We demonstrate that the introduction of an additional scatterer into the near field of a high-quality-factor microresonator can coherently suppress the amount of backscattering in the microresonator by more than 30 dB. The method relies on controlling the scatterer position such that the intrinsic and scatterer-induced backpropagating fields destructively interfere. This technique is useful in microresonator applications where backscattering is currently limiting the performance of devices, such as ring-laser gyroscopes and dual frequency combs, which both suffer from injection locking. Moreover, these findings are of interest for integrated photonic circuits in which back reflections could negatively impact the stability of laser sources or other components.

Dual-Band Bandpass Filter Optimized for High Q-Factor

2021 ◽  
Vol 36 (4) ◽  
pp. 398-410
Author(s):  
Walid Fahmy ◽  
Asmaa Farahat ◽  
Khalid Hussein ◽  
Abd-El-Hadi Ammar
Keyword(s):  
Quality Factor ◽  
Bandpass Filter ◽  
High Quality Factor ◽  
Dual Band ◽  
Optimized Design ◽  
Hybrid Architecture ◽  
Quality Factors ◽  
High Quality ◽  
Resonant Frequencies ◽  
Simulation Results

High quality factor bandpass filters based on a number of cascaded resonators of dual-resonance mechanism are proposed in the present paper. Each resonator is constructed as two overlapped coplanar waveguide (CPW) resonant structures. The cascaded resonators mediate microwave coupling between two isolated corner-shaped CPW feeders only at the resonant frequencies leading to a bandpass filter of high quality factor. The two resonant frequencies and the separation between them can be fine-tuned by the dimensions of the structure. The effects of the dimensional parameters of the resonator and the feeding CPW regions on the resonant frequencies and the performance of the bandpass filter are investigated. The effect of the loss tangent of the dielectric substrate material on the quality factors at the two resonant frequencies is studied. Three prototypes of the proposed filter are fabricated and experimentally studied for more understanding of the underlying physical principles of operation and for verifying some of the simulation results. The experimental results show good agreement when compared with the corresponding simulation results. It is shown that, at low enough absolute temperature, the proposed structure can operate as superconducting microwave resonator when made from the appropriate materials. Also, it is shown that an optimized design of the proposed bandpass filter, based on superconducting CPWR structure, can achieve quality factors high enough to form a quantum data bus for hybrid architecture of quantum information systems.

scholarly journals Design of X-Cut and Z-Cut Lithium Niobate Whispering-Gallery-Mode Disk-Resonators With High Quality Factors

2017 ◽  
Vol 9 (4) ◽  
pp. 1-8 ◽  
Author(s):  
Yu Pan ◽  
Guoping Lin ◽  
Souleymane Diallo ◽  
Xianmin Zhang ◽  
Yanne K. Chembo
Keyword(s):  
Lithium Niobate ◽  
Whispering Gallery Mode ◽  
Quality Factors ◽  
High Quality ◽  
Whispering Gallery ◽  
Disk Resonators

Accurately calculating high quality factor of whispering-gallery modes with boundary element method

2009 ◽  
Vol 26 (11) ◽  
pp. 2050 ◽  
Author(s):  
Chang-Ling Zou ◽  
Yong Yang ◽  
Yun-Feng Xiao ◽  
Chun-Hua Dong ◽  
Zheng-Fu Han ◽  
...  
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Quality Factor ◽  
High Quality Factor ◽  
Whispering Gallery Modes ◽  
High Quality ◽  
Whispering Gallery ◽  
Element Method

Fine Temperature Measurement and Fabrication of On-Chip Whispering-Gallery Mode Micro-Sensors

2013 ◽  
Author(s):  
Matthew Frenkel ◽  
Marlon Avellan ◽  
Zhixiong Guo
Keyword(s):  
High Sensitivity ◽  
Whispering Gallery Mode ◽  
Heat Transfer Analysis ◽  
Fabrication Technique ◽  
Quality Factors ◽  
High Quality ◽  
Whispering Gallery ◽  
Thermal Measurements ◽  
On Chip

Whispering-Gallery mode based optical micro-devices have been demonstrated to have extremely high sensitivity to changes in local temperature owing to their high quality factors and frequency-based measurements. In this paper, we first examine different fabrication techniques for integrating whispering-gallery mode sensors directly onto heating components to realize on-chip in-situ dynamic temperature measurements and monitoring. The merits and drawbacks of each fabrication technique are discussed. Then, the capability of the fabricated on-chip micro-sensors to perform precise real-time thermal measurements was tested, and the findings are discussed. Finally, the advantages of such on-chip sensors are established through heat transfer analysis.

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