Large area resonant feedback random lasers based on dye-doped biopolymer films

Consoli, A.; Silva, Davinson M. da; Wetter, Niklaus Ursus; López, Cefe

doi:10.1364/oe.23.029954

Cited by 29 publications

(20 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A wide variety of material types have been tested as random emitting laser sources, such as colloidal dye solutions, powdered crystals, polymers, biological samples including human tissues, and many possible applications have been proposed, such as speckle-free laser phosphors, displays, optical or chemical sensors for medical diagnostics, nanoscale lithography, etc. [4,5,6,7,8,9]. Many efforts have been made to develop a general theoretical treatment for random lasers (RLs) including spectral behavior [10,11,12], temporal dynamics [13,14,15,16], thresholds [17,18,19,20,21], output energies, etc.…”

Section: Introductionmentioning

confidence: 99%

Random Laser Action in Nd:YAG Crystal Powder

et al. 2016

View full text Add to dashboard Cite

This work explores the room temperature random stimulated emission at 1.064 μm of a Nd:YAG crystal powder (Neodymium-doped yttrium aluminum garnet) in a very simple pump configuration with no assistance from an internal mirror. The laser threshold energy as a function of pump beam area and pump wavelength has been measured, as well as the temporal dynamics of emission pulses. The absolute energy of stimulated emission and the absolute laser slope efficiency have been measured by using a method proposed by the authors. The results show a surprising high efficiency that takes the low Nd3+ ion concentration of the crystal powder into account.

show abstract

Section: Introductionmentioning

confidence: 99%

Random Laser Action in Nd:YAG Crystal Powder

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Since then, a rich variety of materials has been employed in RLs, e.g. powders of active materials8, dye doped biological tissue9, liquid crystals10, optical fibres11, and polymers12.…”

mentioning

confidence: 99%

Lasing optical cavities based on macroscopic scattering elements

Consoli

López

2017

Sci Rep

Self Cite

View full text Add to dashboard Cite

Two major elements are required in a laser device: light confinement and light amplification. Light confinement is obtained in optical cavities by employing a pair of mirrors or by periodic spatial modulation of the refractive index as in photonic crystals and Bragg gratings. In random lasers, randomly placed nanoparticles embedded in the active material provide distributed optical feedback for lasing action. Recently, we demonstrated a novel architecture in which scattering nanoparticles and active element are spatially separated and random lasing is observed. Here we show that this approach can be extended to scattering media with macroscopic size, namely, a pair of sand grains, which act as feedback elements and output couplers, resulting in lasing emission. We demonstrate that the number of lasing modes depends on the surface roughness of the sand grains in use which affect the coherent feedback and thus the emission spectrum. Our findings offer a new perspective of material science and photonic structures, facilitating a novel and simple approach for the realization of new photonics devices based on natural scattering materials.

show abstract

“…The latter one would be manipulated by the subcellular biophysical properties of the cells, which further influence the lasing properties of the BFRL. [42][43][44] Since the gain medium is outside of the cells, the light traveling inside the cells cannot be amplified. Figure S5.…”

Section: Lasing Mechanism Of the Bfrl Filled With The Cellsmentioning

confidence: 99%

Biofluidic Random Laser Cytometer for Biophysical Phenotyping of Cell Suspensions

Ren

et al. 2019

ACS Sens.

View full text Add to dashboard Cite

Phenotypic profiling of single floating cells in liquid biopsies is the key to the era of precision medicine. Random laser in biofluids is a promising tool for the label-free characterization of the biophysical properties due to the high brightness and sharp peaks of the lasing spectra, yet previous reports were limited to the random laser in solid tissues with dense scatterings. In this report, a random laser cytometer is demonstrated in an optofluidic device filled with gain medium and human breast normal/cancerous cells. The multiple light scattering induced by the micro-scale human cells promotes the random lasing and influences the lasing properties in term of laser modes, spectral wavelengths, and lasing thresholds. A sensing strategy based on analyzing the lasing properties to determine both the whole-cell and the subcellular biophysical properties of the cells and the malignant alterations of the cell suspensions are successfully detected. Our results provide a new approach to designing a label-free biophysical cytometer based on optofluidic random laser devices, which is advantageous for further research in the field of random laser bio-application.

show abstract

Large area resonant feedback random lasers based on dye-doped biopolymer films

Cited by 29 publications

References 28 publications

Random Laser Action in Nd:YAG Crystal Powder

Random Laser Action in Nd:YAG Crystal Powder

Lasing optical cavities based on macroscopic scattering elements

Biofluidic Random Laser Cytometer for Biophysical Phenotyping of Cell Suspensions

Contact Info

Product

Resources

About