Random Lasers: Development, Features and Applications

Cao, Hui

doi:10.1364/opn.16.1.000024

Cited by 94 publications

(53 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While RL has been observed in a wide variety of materials, one of the primary material classes used for studying RL is organic dyes and nanoparticles doped into solution or polymer. These materials are attractive as they are easy and cheap to produce, and allow for the formation of arbitrary shapes [7]. While organic dyes have these attractive features, they also have a major flaw in that they tend to irreversibly photodegrade under extended exposure to high intensity light [27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Photodegradation and self-healing in a Rhodamine 6G dye and $$\hbox {Y}_{2}\hbox {O}_{3}$$ nanoparticle-doped polyurethane random laser

2015

View full text Add to dashboard Cite

One of the fundamental difficulties in implementing organic dyes in random lasers is irreversible photodegradation of the dye molecules, leading to loss of performance and the need to replace the dye. We report the observation of self-healing after photodegradation in a Rhodamine 6G dye and nanoparticle doped polyurethane random laser. During irradiation we observe two distinct temporal regions in which the random lasing (RL) emission first increases in intensity and redshifts, followed by further redshifting, spectral broadening, and decay in the emission intensity. After irradiation the emission intensity is found to recover back to its peak value, while still being broadened and redshifted, which leads to the result of an enhancement of the spectrally integrated intensity. We also perform IR-VIS absorbance measurements and find that the results suggest that during irradiation some of the dye molecules form dimers and trimers and that the polymer host is irreversibly damaged by photooxidation and Norrish type I photocleavage.

show abstract

Section: Introductionmentioning

confidence: 99%

Photodegradation and self-healing in a Rhodamine 6G dye and $$\hbox {Y}_{2}\hbox {O}_{3}$$ nanoparticle-doped polyurethane random laser

2015

View full text Add to dashboard Cite

show abstract

“…Scattering feedback for lasing action is obtained in random lasers (RLs) through random spatial distribution of scattering centers into an active element12. Seminal work on this idea appeared few years after the realization of the first laser34.…”

mentioning

confidence: 99%

Lasing optical cavities based on macroscopic scattering elements

Consoli

López

2017

Sci Rep

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

“…Supernarrow peaks of the coherent random lasers are due to high Q-resonances in microcavities, which have random geometrical parameters and thus and thus are unique for each sample. A random character of the resonant frequencies produced by these microcavities enables authenticity of the 'laser label' attached to a document [125]. The random lasing could also be used while detecting chemical impurities in liquids, including water, or in novel displays with extremely high switching speeds and resolutions.…”

Section: Applications Of Random Lasersmentioning

confidence: 99%

Optically pumped mirrorless lasing. A review. Part I. Random lasing

Nastishin¹,

Dudok²

2013

Ukr. J. Phys. Opt.

View full text Add to dashboard Cite

Abstract. Currently optically pumped mirrorless lasing is represented by three distinct branches, which concern lasing in different types of the gain media: optically random and photonic media, and microcavities. This article is a first part of our review on optically pumped mirrorless lasing, with the random lasing in scattering media being a main subject. The other mirrorless lasing mechanisms will be addressed in the second part. Considering light localization as a key function of the feedback, we discuss possible mechanisms for the light localization in the scattering media. Special attention is paid to the Anderson light localization. The other mechanisms of the light localization in the scattering media concern high Q-resonances in local microresonators, which exist due to structural inhomogeneities in the scattered media. Applications of the random lasers are shortly reviewed.

show abstract

Random Lasers: Development, Features and Applications

Cited by 94 publications

References 8 publications

Photodegradation and self-healing in a Rhodamine 6G dye and $$\hbox {Y}_{2}\hbox {O}_{3}$$ nanoparticle-doped polyurethane random laser

Photodegradation and self-healing in a Rhodamine 6G dye and $$\hbox {Y}_{2}\hbox {O}_{3}$$ nanoparticle-doped polyurethane random laser

Lasing optical cavities based on macroscopic scattering elements

Optically pumped mirrorless lasing. A review. Part I. Random lasing

Contact Info

Product

Resources

About