Single‐Crystal Organic Heterostructure for Single‐Mode Unidirectional Whispering‐Gallery‐Mode Laser

2021 ◽  
pp. 2101931
Author(s):  
Song Chen ◽  
Xue‐Dong Wang ◽  
Ming‐Peng Zhuo ◽  
Guo‐Qing Wei ◽  
Jun‐Jie Wu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Single Mode ◽  
Whispering Gallery Mode ◽  
Mode Laser ◽  
Whispering Gallery

scholarly journals Optical whispering-gallery mode barcodes for high-precision and wide-range temperature measurements

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Jie Liao ◽  
Lan Yang
Keyword(s):  
High Precision ◽  
Dynamic Range ◽  
Single Mode ◽  
Whispering Gallery Mode ◽  
Temperature Measurements ◽  
Laser Source ◽  
Multiple Modes ◽  
Whispering Gallery ◽  
Wide Range ◽  
Thermal Sensing

AbstractTemperature is one of the most fundamental physical properties to characterize various physical, chemical, and biological processes. Even a slight change in temperature could have an impact on the status or dynamics of a system. Thus, there is a great need for high-precision and large-dynamic-range temperature measurements. Conventional temperature sensors encounter difficulties in high-precision thermal sensing on the submicron scale. Recently, optical whispering-gallery mode (WGM) sensors have shown promise for many sensing applications, such as thermal sensing, magnetic detection, and biosensing. However, despite their superior sensitivity, the conventional sensing method for WGM resonators relies on tracking the changes in a single mode, which limits the dynamic range constrained by the laser source that has to be fine-tuned in a timely manner to follow the selected mode during the measurement. Moreover, we cannot derive the actual temperature from the spectrum directly but rather derive a relative temperature change. Here, we demonstrate an optical WGM barcode technique involving simultaneous monitoring of the patterns of multiple modes that can provide a direct temperature readout from the spectrum. The measurement relies on the patterns of multiple modes in the WGM spectrum instead of the changes of a particular mode. It can provide us with more information than the single-mode spectrum, such as the precise measurement of actual temperatures. Leveraging the high sensitivity of WGMs and eliminating the need to monitor particular modes, this work lays the foundation for developing a high-performance temperature sensor with not only superior sensitivity but also a broad dynamic range.

Miniaturized Optical Microwave Source Using a Dual-Wavelength Whispering Gallery Mode Laser

2010 ◽  
Vol 22 (8) ◽  
pp. 559-561 ◽  
Author(s):  
Lei Xiao ◽  
Stéphane Trebaol ◽  
Yannick Dumeige ◽  
Zhiping Cai ◽  
Michel Mortier ◽  
...  
Keyword(s):  
Whispering Gallery Mode ◽  
Dual Wavelength ◽  
Microwave Source ◽  
Mode Laser ◽  
Whispering Gallery

Solution-processed whispering-gallery-mode microsphere lasers based on colloidal CsPbBr3 perovskite nanocrystals

2021 ◽  
Author(s):  
Minghong Xie ◽  
Wenxiao Gong ◽  
Lei Kong ◽  
Yang Liu ◽  
Yang Mi ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Single Mode ◽  
Whispering Gallery Mode ◽  
Solution Processed ◽  
Time Resolved ◽  
Perovskite Nanocrystals ◽  
Whispering Gallery ◽  
Low Threshold ◽  
The Stability

Abstract Perovskite nanocrystals (NCs) have emerged as attractive gain materials for solution-processed microlasers. Despite the recent surge of reports in this feld, it is still challenging to develop low-cost perovskite NCbased microlasers with high performance. Herein, we demonstrate low-threshold, spectrally tunable lasing from ensembles of CsPbBr3 NCs deposited on silica microspheres. Multiple whispering-gallery-mode lasing is achieved from individual NC/microspheres with a low threshold of ∼3.1 µJ cm−2 and cavity quality factor of ∼1193. Through time-resolved photoluminescence measurements, electron-hole plasma recombination is elucidated as the lasing mechanism. By tuning the microsphere diameter, the desirable single-mode lasing is successfully achieved. Remarkably, the CsPbBr3 NCs display durable room-temperature lasing under ∼107 shots of pulsed laser excitation, substantially exceeding the stability of conventional colloidal NCs. These CsPbBr3 NC-based microlasers can be potentially useful in photonic applications.

Factor of Influencing Pumping Threshold Energy of Whispering-Gallery-Mode Laser in a Cylindrical Micro-Cavity

2008 ◽  
Vol 35 (5) ◽  
pp. 660-663 ◽  
Author(s):  
江楠 Jiang Nan ◽  
杜飞 Du Fei ◽  
白然 Bai Ran ◽  
向文丽 Xiang Wenli ◽  
普小云 Pu Xiaoyun
Keyword(s):  
Threshold Energy ◽  
Whispering Gallery Mode ◽  
Mode Laser ◽  
Whispering Gallery ◽  
Micro Cavity

Robust single-mode lasers based on hexagonal CdS microflakes

2020 ◽  
Vol 8 (32) ◽  
pp. 11201-11208
Author(s):  
Yang Mi ◽  
Yaoyao Wu ◽  
Jinchun Shi ◽  
Sheng-Nian Luo
Keyword(s):  
Radiative Recombination ◽  
Single Mode ◽  
Whispering Gallery Mode ◽  
Radiative Recombination Rate ◽  
Electron Hole ◽  
High Quality ◽  
Time Resolved ◽  
Whispering Gallery ◽  
Electron Hole Plasma ◽  
Time Resolved Photoluminescence

We have achieved single-mode whispering-gallery-mode lasing in CdS microflakes with sharp linewidth (∼0.12 nm) and high quality factor (∼4200). Such lasers are superior to previous CdS lasers in these lasing parameters. Through time-resolved photoluminescence measurements, electron–hole plasma recombination is established to be the lasing mechanism. The radiative recombination rate of CdS microflakes is enhanced by a factor of ∼4.7 due to the Purcell effect.

Organic single-crystalline whispering-gallery mode microlasers with efficient optical gain activated via excited state intramolecular proton transfer luminogens

2020 ◽  
Vol 8 (34) ◽  
pp. 11916-11921
Author(s):  
Guo-Qing Wei ◽  
Yue Yu ◽  
Ming-Peng Zhuo ◽  
Xue-Dong Wang ◽  
Liang-Sheng Liao
Keyword(s):  
Excited State ◽  
Energy Level ◽  
Single Crystals ◽  
Organic Dyes ◽  
Optical Gain ◽  
Whispering Gallery Mode ◽  
Intramolecular Proton Transfer ◽  
Level System ◽  
Mode Laser ◽  
Whispering Gallery

A whispering-gallery mode laser with a favored energy level system is achieved based on the single crystals of ESIPT-active organic dyes.

Fabrication, Characterization and Microsensing of Whispering-Gallery Mode Micro-Coupling Systems

2008 ◽  
Author(s):  
Qiulin Ma ◽  
Tobias Rossmann ◽  
Zhixiong Guo
Keyword(s):  
Transmission Loss ◽  
Coupling Efficiency ◽  
High Sensitivity ◽  
Single Mode ◽  
Whispering Gallery Mode ◽  
Single Mode Fiber ◽  
Whispering Gallery ◽  
Coupling System ◽  
Wide Range ◽  
Micro Sensor

An optical micro-coupling system of whispering-gallery mode usually consists of a resonator (e.g. a sphere) and a coupler (e.g. a taper). In this report, silica microspheres of 50–500 μm in diameter are fabricated by hydrogen flame fusing of an end of a single mode fiber or fiber taper. Fiber tapers are fabricated by the method of heating and pulling that meets an adiabatic condition. Taper’s waist diameter can routinely be made less than 1 μm and almost zero transmission loss in a taper is achieved which allows an effective and phase-matched coupling for a wide range sizes of microspheres. Both resonators and couplers’ surface microstructure and shapes are examined by scanning electronic microscopy. Three regimes of coupling are achieved, enabling a good flexibility to control Q value and coupling efficiency of a micro-coupling system. Whispering gallery mode shift is used to demonstrate a novel temperature micro-sensor. Its sensitivity determined from actual experimental results agrees well with the theoretical value. A concept of using the photon’s cavity ring down (CRD) in the microsphere to make a novel high-sensitivity trace gas micro-sensor is proposed. The CRD time constant when ammonia is chosen as the analyte gas is predicted using the simulated absorption lines.

Investigation of PIN-PMN-PT single-crystal based whispering gallery mode resonator

2020 ◽  
Author(s):  
Yang Liu ◽  
Zhuang yongyong ◽  
Zhao Weigang ◽  
Liu Xing ◽  
zhao Ye ◽  
...  
Keyword(s):  
Single Crystal ◽  
Whispering Gallery Mode ◽  
Whispering Gallery ◽  
Whispering Gallery Mode Resonator ◽  
Mode Resonator

Polymer based whispering gallery mode laser for biosensing applications

2015 ◽  
Vol 106 (3) ◽  
pp. 031104 ◽  
Author(s):  
Alexandre François ◽  
Nicolas Riesen ◽  
Hong Ji ◽  
Shahraam Afshar V. ◽  
Tanya M. Monro
Keyword(s):  
Whispering Gallery Mode ◽  
Mode Laser ◽  
Whispering Gallery

Highly efficient generation of narrow-band single-mode photon pairs from a whispering gallery mode resonator

CLEO: 2014 ◽  
2014 ◽  
Author(s):  
Michael Förtsch ◽  
Gerhard Schunk ◽  
Josef Fürst ◽  
Florian Sedlmeir ◽  
Dmitry Strekalov ◽  
...  
Keyword(s):  
Narrow Band ◽  
Single Mode ◽  
Whispering Gallery Mode ◽  
Whispering Gallery ◽  
Highly Efficient ◽  
Efficient Generation ◽  
Photon Pairs ◽  
Whispering Gallery Mode Resonator ◽  
Mode Resonator
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