Amplified Spontaneous Emission (ASE) Properties of a laser dye (LD-473) in solid state

Ibnaouf, K.H.; Taha, Kamal K.; Idriss, Hajo; Aldaghri, O.

doi:10.1186/s41476-017-0049-5

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…Notably, the obtained value of g (8.5 ± 0.6 cm –1 , Figure S2c) for fluorescein is found to be less than gCD2. Moreover, the recorded values of g for the gCDs are higher than previously reported CDs. , In summary, such high values of σ em and g , together with a well-defined gain spectral region as found from TA measurements, strongly suggest the possibility of achieving lasing by using gCDs in a wide concentration range.…”

Section: Results and Discussionmentioning

confidence: 49%

“…Moreover, the recorded values of g for the gCDs are higher than previously reported CDs. 33,63 In summary, such high values of σ em and g, together with a well-defined gain spectral region as found from TA measurements, strongly suggest the possibility of achieving lasing by using gCDs in a wide concentration range. Incoherent and Coherent Random Laser Emission from gCDs.…”

Section: ■ Results and Discussionmentioning

confidence: 53%

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Statistically Identified Dual Type Random Lasing from Carbon Dots

Pramanik,

Reale,

Cannas

et al. 2024

ACS Photonics

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Random lasers (RLs) attract a growing interest in photonics as laser-like sources featuring specific benefits over traditional lasers for some applications. Carbon dots (CDs) are well-recognized as one of the most appealing fluorescent nanomaterials for light emitting devices. However, achieving unambiguous and controllable RL emission from CDs remains challenging. Here, we demonstrate RL emission at ∼565 nm from green emitting CDs (gCDs), and we use the emitted light as a light source for the speckle-free microscopy of biological tissues and microparticles. The emission of the CD-based RL is thoroughly studied as a function of the experimental conditions, and well-established mathematical tools in the field are used to perform a detailed statistical study of the lasing output. The CD-based RL displays ultranarrow (∼0.70 nm) emission lines over a comparatively broader (∼10 nm) background. These two emissions are due to the so-called coherent and incoherent RL. Their relative weight can be controlled by an appropriate choice of experimental conditions, allowing us to tune the characteristics of RL light. The results demonstrate the potential of gCDs as a viable alternative to environmentally unfriendly, scarce, or chemically unstable nanomaterials as gain media for RL with customizable emissions.

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Section: Results and Discussionmentioning

confidence: 49%

Section: ■ Results and Discussionmentioning

confidence: 53%

Statistically Identified Dual Type Random Lasing from Carbon Dots

Pramanik,

Reale,

Cannas

et al. 2024

ACS Photonics

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“…The ASE peak at 545 nm corresponds to the fluorescence peak at 541 nm, and there is no fluorescence band at 565 nm corresponding to ASE at 565 nm. Based on the obtained results, one can attribute the peak at 565 nm to the presence of the superexciplex state [ 32 , 33 , 34 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

Spectral Characteristics and Molecular Structure of (E)-1-(4-Chlorophenyl)-3-(4-(Dimethylamino)Phenyl)Prop-2-en-1-One (DAP)

Aldaghri

2021

Materials

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In this work, a laser dye of (E)-1-(4-chlorophenyl)-3-(4-(dimethylamino)phenyl)prop-2-en-1-one (DAP) was synthesized and examined as a new laser medium. The compound DAP’s photophysical properties were investigated under the influence of solvents, concentrations, and pump power excitations. The absorption spectra showed a single band, and the shape of the spectra remained the same, regardless of the optical density. The fluorescence spectra showed a band around 538 nm; its intensity was inversely proportional to the concentration. DAP exhibits dual amplified spontaneous emission (ASE) bands at 545 and 565 nm under suitable pump power laser excitation and concentration. The results revealed that the ASE band at 565 nm is affected by solvents polarity, concentrations and pump power energies. This band could be attributed to the combination of two excited molecules and the solvent between them (superexciplex). Moreover, the molecular structure, the energy bandgap, and the total energy of DAP was calculated using density functional theory.

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Exploring the Crucial Role of Plant Growth-Promoting Rhizobacteria (PGPR) in Plant Secondary Metabolite Production and Diabetes Management

Khadka

Pandey

2022

Fungal Biology

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Amplified Spontaneous Emission (ASE) Properties of a laser dye (LD-473) in solid state

Cited by 6 publications

References 22 publications

Statistically Identified Dual Type Random Lasing from Carbon Dots

Statistically Identified Dual Type Random Lasing from Carbon Dots

Spectral Characteristics and Molecular Structure of (E)-1-(4-Chlorophenyl)-3-(4-(Dimethylamino)Phenyl)Prop-2-en-1-One (DAP)

Exploring the Crucial Role of Plant Growth-Promoting Rhizobacteria (PGPR) in Plant Secondary Metabolite Production and Diabetes Management

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