Quantitative analysis of “Δl = ls − lg” to coherent random lasing in solution systems with a series of solvents ordered by refractive index

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 98066-98070 ◽  
Author(s):  
Leicheng Yin ◽  
Yunyun Liang ◽  
Bo Yu ◽  
Yeping Wu ◽  
Jiajun Ma ◽  
...  
Keyword(s):  
Refractive Index ◽  
Quantitative Analysis ◽  
Laser Action ◽  
Random Laser ◽  
Random Lasing ◽  
Solution System ◽  
System P

Random laser action affected by solvents ordered by refractive index in solution system.

scholarly journals Random Laser Action in Dye-Doped Polymer Media with Inhomogeneously Distributed Particles and Gain

2019 ◽  
Vol 9 (17) ◽  
pp. 3499
Author(s):  
Takashi Okamoto ◽  
Masaki Mori
Keyword(s):  
Random Media ◽  
Laser Action ◽  
Experimental Results ◽  
Random Laser ◽  
Random Lasing ◽  
Peak Intensity ◽  
Spectral Narrowing ◽  
Bubble Structure ◽  
Doped Polymer ◽  
Diffusion Properties

The properties of random lasing are investigated for bubble-structure (BS) dye-doped polymer random media in which non-scattering and no-gain regions are distributed. Experimental results demonstrate that, for BS random media, spectral narrowing and a decrease in the number of spectral spikes occur for incoherent and coherent random lasing, respectively, resulting in an increase in the spectral peak intensity in both cases. These features were observed owing to the differences in the diffusion properties of the pumping and emitted lights.

A silver/graphene oxide nanocomposite film as a flexible SERS substrate for reliable quantitative analysis using high-speed spiral scanning spectrometry

2017 ◽  
Vol 53 (73) ◽  
pp. 10108-10111 ◽  
Author(s):  
Yejung Choi ◽  
Si Won Song ◽  
Wytse Hooch Antink ◽  
Hyung Min Kim ◽  
Yuanzhe Piao
Keyword(s):  
Graphene Oxide ◽  
Quantitative Analysis ◽  
Nanocomposite Film ◽  
High Speed ◽  
Scanning System ◽  
Adhesive Tape ◽  
Sers Substrate ◽  
Spiral Scanning ◽  
System P

Excellent uniformity (∼1.5% RSD) in SERS signals was obtained from an Ag/GO decorated adhesive tape on a simple in-house cylindrical scanning system.

Research Progress of Random Laser Action in Liquid Crystal

2008 ◽  
Vol 45 (9) ◽  
pp. 16-24 ◽  
Author(s):  
周利兵 Zhou Libing ◽  
刘劲松 Liu Jinsong ◽  
王可嘉 Wang Kejia ◽  
吕健滔 Lü Jiantao ◽  
刘海 Liu Hai ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Laser Action ◽  
Research Progress ◽  
Random Laser

Effective random laser action in Rhodamine 6G solution with Al nanoparticles

2011 ◽  
Vol 50 (13) ◽  
pp. 1816 ◽  
Author(s):  
Liling Yang ◽  
Guoying Feng ◽  
Jiayu Yi ◽  
Ke Yao ◽  
Guoliang Deng ◽  
...  
Keyword(s):  
Rhodamine 6G ◽  
Laser Action ◽  
Random Laser ◽  
Al Nanoparticles

scholarly journals Application of the calibration surfaces method in quantitative analysis of water — ethanol — methanol mixture

2013 ◽  
Vol 11 (7) ◽  
pp. 1239-1247 ◽  
Author(s):  
Marta Sawicka ◽  
Jacek Soroka
Keyword(s):  
Refractive Index ◽  
Quantitative Analysis ◽  
Mass Fraction ◽  
Regression Method ◽  
Quantitative Composition ◽  
The Third ◽  
Point Density ◽  
Definition Of ◽  
Solvatochromic Dye ◽  
Order Surface

AbstractThe simple and quick calibration surfaces method has been applied to the quantitative analysis of water — ethanol — methanol mixtures. The refractive index, viscosity, boiling point, density, and position of the absorption band of the solvatochromic dye and the absorbance of the band corresponding to a particular wavelength were used as measured magnitudes which are functionally related to the quantitative composition of the mixture. The 3rd order surface equation was fitted to the experimental data via the multidimensional regression method. Various pairs of macroscopic features were tested to obtain the best results. To find the solution, the set of three equations were calculated, in which two equations were the mathematical description of particular macroscopic features; the third one resulted from the definition of mass fraction. The detection and determination limits as well as the error of the method were determined which proved that the refractive index and the density were the most adequate pair of macroscopic features.

Random laser action in dielectric-metal-dielectric surface plasmon waveguides

2009 ◽  
Vol 95 (23) ◽  
pp. 231114 ◽  
Author(s):  
Ashwani Kumar ◽  
S. F. Yu ◽  
X. F. Li
Keyword(s):  
Surface Plasmon ◽  
Laser Action ◽  
Dielectric Surface ◽  
Random Laser

Random Laser Action in Dye Doped-films Deposited on Ga2O3 Arranged in a Sea Urchin-like Nanostructures

2014 ◽  
Author(s):  
Christian Tolentino Dominguez ◽  
Ronaldo P. de Melo ◽  
Marco Sacilotti ◽  
Cid B. de Araújo ◽  
Anderson S. L. Gomes
Keyword(s):  
Sea Urchin ◽  
Laser Action ◽  
Random Laser

scholarly journals A Self-Consistent Quantum Field Theory for Random Lasing

2019 ◽  
Vol 9 (12) ◽  
pp. 2477 ◽  
Author(s):  
Andreas Lubatsch ◽  
Regine Frank
Keyword(s):  
Phase Transition ◽  
Random Media ◽  
Theoretical Method ◽  
Pump Intensity ◽  
Stimulated Emission ◽  
Random Laser ◽  
Central Feature ◽  
Quantum Field ◽  
Random Lasing ◽  
Correlation Volume

The spatial formation of coherent random laser modes in strongly scattering disordered random media is a central feature in the understanding of the physics of random lasers. We derive a quantum field theoretical method for random lasing in disordered samples of complex amplifying Mie resonators which is able to provide self-consistently and free of any fit parameter the full set of transport characteristics at and above the laser phase transition. The coherence length and the correlation volume respectively is derived as an experimentally measurable scale of the phase transition at the laser threshold. We find that the process of stimulated emission in extended disordered arrangements of active Mie resonators is ultimately connected to time-reversal symmetric multiple scattering in the sense of photonic transport while the diffusion coefficient is finite. A power law is found for the random laser mode diameters in stationary state with increasing pump intensity.

scholarly journals Polymer Lasing in a Periodic-Random Compound Cavity

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1194 ◽  
Author(s):  
Tianrui Zhai ◽  
Xiaofeng Wu ◽  
Songtao Li ◽  
Shuyan Liang ◽  
Lianze Niu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Distributed Feedback ◽  
Interference Lithography ◽  
Random Laser ◽  
Random Lasing ◽  
Optically Pumped ◽  
Light Emitting ◽  
Grating Structure ◽  
Laser Sources

Simultaneous distributed feedback (DFB) lasing and linear polarized random lasing are observed in a compound cavity, which consists of a grating cavity and a random cavity. The grating cavity is fabricated by interference lithography. A light-emitting polymer doped with silver nanoparticles is spin-coated on the grating, forming a random cavity. DFB lasing and random lasing occur when the periodic-random compound cavity is optically pumped. The directionality and polarization of the random laser are modified by the grating structure. These results can potentially be used to design integrated laser sources.

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