scholarly journals Observation of polarized gain from aligned colloidal nanorods

Nanoscale ◽  
2015 ◽  
Vol 7 (15) ◽  
pp. 6481-6486 ◽  
Author(s):  
Yuan Gao ◽  
Van Duong Ta ◽  
Xin Zhao ◽  
Yue Wang ◽  
Rui Chen ◽  
...  
Keyword(s):  
Capillary Tube ◽  
Whispering Gallery Mode ◽  
Gain Medium ◽  
Whispering Gallery

We demonstrated the highly polarized whispering-gallery mode lasing from aligned nanorods as a polarized gain medium formed in a capillary tube.

scholarly journals Microscale whispering-gallery-mode light sources with lattice-confined atoms

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Deshui Yu ◽  
Frank Vollmer
Keyword(s):  
Precision Measurement ◽  
Quantum Information Processing ◽  
Photon Emission ◽  
Earth Metal ◽  
Coupled System ◽  
Whispering Gallery Mode ◽  
Gain Medium ◽  
Light Sources ◽  
Whispering Gallery ◽  
Ring Shape

AbstractMicrolasers, relying on the strong coupling between active particles and optical microcavity, exhibit fundamental differences from conventional lasers, such as multi-threshold/thresholdless behavior and nonclassical photon emission. As light sources, microlasers possess extensive applications in precision measurement, quantum information processing, and biochemical sensing. Here we propose a whispering-gallery-mode microlaser scheme, where ultracold alkaline-earth metal atoms, i.e., gain medium, are tightly confined in a two-color evanescent lattice that is in the ring shape and formed around a microsphere. To suppress the influence of the lattice-induced ac Stark shift on the moderately-narrow-linewidth laser transition, the red-detuned trapping beams operate at a magic wavelength while the wavelength of the blue-detuned trapping beam is set close to the other magic wavelength. The tiny mode volume and high quality factor of the microsphere ensure the strong atom-microcavity coupling in the bad-cavity regime. As a result, both saturation photon and critical atom numbers, which characterize the laser performance, are substantially reduced below unity. We explore the lasing action of the coupled system by using the Monte Carlo approach. Our scheme may be potentially generalized to the microlasers based on the forbidden clock transitions, holding the prospect for microscale active optical clocks in precision measurement and frequency metrology.

Highly efficient and ultra-narrow bandwidth orange emissive carbon dots for microcavity lasers

Nanoscale ◽  
2019 ◽  
Vol 11 (24) ◽  
pp. 11577-11583 ◽  
Author(s):  
Zhixia Han ◽  
Yiqun Ni ◽  
Junkai Ren ◽  
Wenfei Zhang ◽  
Yunfeng Wang ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Whispering Gallery Mode ◽  
Gain Medium ◽  
Full Width ◽  
Solid State Lasers ◽  
Microcavity Lasers ◽  
Laser Gain ◽  
Whispering Gallery ◽  
Narrow Bandwidth ◽  
First Time

Orange emissive carbon dots with 82% PL quantum yield and 30 nm full width at half maximum are utilized as a laser gain medium to realize whispering gallery mode solid state lasers for the first time.

Whispering gallery mode laser based on antitumor drug–dye complex gain medium

2012 ◽  
Vol 37 (22) ◽  
pp. 4756 ◽  
Author(s):  
Fernando Lahoz ◽  
Claudio J. Oton ◽  
David López ◽  
Jorge Marrero-Alonso ◽  
Alicia Boto ◽  
...  
Keyword(s):  
Whispering Gallery Mode ◽  
Gain Medium ◽  
Antitumor Drug ◽  
Mode Laser ◽  
Whispering Gallery

scholarly journals Tunable WGM Laser Based on the Polymer Thermo-Optic Effect

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 205
Author(s):  
Shuai Zhang ◽  
Tianrui Zhai ◽  
Libin Cui ◽  
Xiaoyu Shi ◽  
Kun Ge ◽  
...  
Keyword(s):  
Laser Emission ◽  
Capillary Tube ◽  
Coupling Effect ◽  
Whispering Gallery Mode ◽  
Light Emitting ◽  
Mode Laser ◽  
Whispering Gallery ◽  
Tuning Rate ◽  
Response To Temperature ◽  
Micro Cavity

In this work, the thermo-optic effect in polymers was used to realize a temperature-tunable whispering-gallery-mode laser. The laser was fabricated using a capillary tube filled with a light-emitting conjugated polymer solution via the capillary effect. In the whispering-gallery-mode laser emission wavelength can be continuously tuned to about 19.5 nm using thermo-optic effect of polymer. The influence of different organic solvents on the tuning rate was studied. For a typical lasing mode with a bandwidth of 0.08 nm, a temperature-resolved tuning rate of ~1.55 nm/°C was obtained. The two-ring coupling effect is responsible for the suppression of the WGM in the micro-cavity laser. The proposed laser exhibited good reversibility and repeatability as well as a sensitive response to temperature, which could be applied to the design of photothermic and sensing devices.

Evaluation of Effective Conductivity of Copper-Clad Dielectric Laminate Substrates in Millimeter-Wave Bands Using Whispering Gallery Mode Resonators

2009 ◽  
Vol E92-C (12) ◽  
pp. 1504-1511 ◽  
Author(s):  
Thi Huong TRAN ◽  
Yuanfeng SHE ◽  
Jiro HIROKAWA ◽  
Kimio SAKURAI ◽  
Yoshinori KOGAMI ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Effective Conductivity ◽  
Whispering Gallery Mode ◽  
Whispering Gallery

A whispering-gallery-mode microlaser based on dual erbium-doped microspheres

2021 ◽  
Vol 142 ◽  
pp. 107254
Author(s):  
Jing Yan ◽  
D.N. Wang ◽  
Xin Liu ◽  
Jikai Chen
Keyword(s):  
Whispering Gallery Mode ◽  
Whispering Gallery ◽  
Erbium Doped

A whispering gallery mode strain sensor based on microtube resonator

2021 ◽  
Vol 17 (4) ◽  
pp. 199-204
Author(s):  
Yu Liu ◽  
Hui-hui Yang ◽  
Yong-le Lu ◽  
Ke Di ◽  
Jun-qi Guo
Keyword(s):  
Strain Sensor ◽  
Whispering Gallery Mode ◽  
Whispering Gallery
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