Effect of metal-dielectric environments on spontaneous emission and concentration quenching of HITC laser dye

2021 ◽  
Author(s):  
Sangeeta Rout ◽  
Samantha R. Koutsares ◽  
Srujana Prayakarao ◽  
Devon Courtwright ◽  
Vanessa Peters ◽  
...  
Keyword(s):  
Spontaneous Emission ◽  
Concentration Quenching ◽  
Laser Dye

scholarly journals Effect of Random Nanostructured Metallic Environments on Spontaneous Emission of HITC Dye

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2135
Author(s):  
Sangeeta Rout ◽  
Zhen Qi ◽  
Ludvig S. Petrosyan ◽  
Tigran V. Shahbazyan ◽  
Monika M. Biener ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Theoretical Model ◽  
Spontaneous Emission ◽  
Concentration Quenching ◽  
Decay Rates ◽  
Laser Dye ◽  
Strongly Coupled ◽  
Strong Energy ◽  
Concentration Quenching Of Luminescence ◽  
Kinetics Of

We have studied emission kinetics of HITC laser dye on top of glass, smooth Au films, and randomly structured porous Au nanofoams. The observed concentration quenching of luminescence of highly concentrated dye on top of glass (energy transfer to acceptors) and the inhibition of the concentration quenching in vicinity of smooth Au films were in accord with our recent findings. Intriguingly, the emission kinetics recorded in different local spots of the Au nanofoam samples had a spread of the decay rates, which was large at low dye concentrations and became narrower with increase of the dye concentration. We infer that in different subvolumes of Au nanofoams, HITC molecules are coupled to the nanofoams weaker or stronger. The inhibition of the concentration quenching in Au nanofoams was stronger than on top of smooth Au films. This was true for all weakly and strongly coupled subvolumes contributing to the spread of the emission kinetics. The experimental observations were explained using theoretical model accounting for change in the Förster radius caused by the strong energy transfer to metal.

scholarly journals Spectral and ASE Properties of 1-(4-Methylsulfonyl Phenyl)-3-(4-N, N Dimethyl Amino Phenyl)-2-Propen-1-One (MSPPP)

2021 ◽  
Author(s):  
Mohana University ◽  
Abdelrahman A. Elbadawi ◽  
K.H. Ibnaouf
Keyword(s):  
Quantum Yield ◽  
Spontaneous Emission ◽  
Fluorescence Spectra ◽  
Laser Excitation ◽  
Stokes Shift ◽  
Amplified Spontaneous Emission ◽  
Wavelength Band ◽  
Laser Dye ◽  
Energy Band Gap ◽  
Pulse Laser Excitation

Abstract This work demonstrates the spectral and amplified spontaneous emission (ASE) properties of a new chalcone laser dye material of 1-(4-methylsulfonyl phenyl)-3-(4-N, N dimethyl amino phenyl)-2-propen-1-one (MSPPP). The absorption, fluorescence, Stokes’ shift and quantum yield were obtained using different organic solvents. The energy band gap was calculated and compared with that of 3-[4-(dimethylamino) phenyl]-1-phenyl-(2E)-propen- 1-one (DAPPP). These include absorption, fluorescence, stokes shift, and amplified spontaneous emission (ASE). The absorption spectra of MSPPP showed a wavelength band in the range 403–427 nm, whereas the fluorescence spectra exhibited a band at 472–533 nm. ASE was observed under pump pulse laser excitation, and the wavelengths were attuned from 511 to 548 nm.

High-resolution amplified spontaneous emission (ASE) gain spectroscopy to study excited state complexation

1991 ◽  
Vol 69 (12) ◽  
pp. 2142-2149 ◽  
Author(s):  
R. W. Yip ◽  
Y-X. Wen
Keyword(s):  
Excited State ◽  
Steady State ◽  
High Resolution ◽  
Key Words ◽  
Spontaneous Emission ◽  
Amplified Spontaneous Emission ◽  
Frequency Resolution ◽  
Laser Dye ◽  
Weakly Bound ◽  
Laser Gain

Weakly bound excited state complexes involving 7-diethylamino-4-methylcoumarin have been studied by ASE gain spectroscopy to explore the applicability of the method for studying excited state complexation. Comparative steady state spectrofluorometric and ASE gain measurements showed that ASE gain measurements are capable of giving information on excited state complexation of the laser dye but with greater ease and frequency resolution. Key words: excited state complex, amplified spontaneous emission, laser gain, ASE gain spectroscopy

scholarly journals Modified spontaneous emission spectra of laser dye in inverse opal photonic crystals

2000 ◽  
Vol 63 (1) ◽  
Author(s):  
Henry P. Schriemer ◽  
Henry M. van Driel ◽  
A. Femius Koenderink ◽  
Willem L. Vos
Keyword(s):  
Photonic Crystals ◽  
Spontaneous Emission ◽  
Emission Spectra ◽  
Inverse Opal ◽  
Laser Dye

scholarly journals Amplified spontaneous emission and gain in highly concentrated Rhodamine-doped peptide derivative

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrey Machnev ◽  
Daniel Ofer ◽  
Ivan Shishkin ◽  
Vitali Kozlov ◽  
Carlo Diaferia ◽  
...  
Keyword(s):  
Spontaneous Emission ◽  
Rhodamine B ◽  
Fluorescent Dyes ◽  
Amplified Spontaneous Emission ◽  
Concentration Quenching ◽  
Hybrid Polymer ◽  
High Quantum Yield ◽  
Light Emitting ◽  
Peptide Derivative ◽  
Living Organisms

AbstractBioinspired fluorescence, being widely explored for imaging purposes, faces challenges in delivering bright biocompatible sources. While quite a few techniques have been developed to reach this goal, encapsulation of high-quantum yield fluorescent dyes in natural biological forms suggest achieving superior light-emitting characteristics, approaching amplified spontaneous emission and even lasing. Here we compare gain capabilities of highly concentrated Rhodamine B solutions with a newly synthesized biocompatible peptide derivative hybrid polymer/peptide material, RhoB-PEG1300-F6, which contains the fluorescent covalently bound dye. While concentration quenching effects limit the maximal achievable gain of dissolved Rhodamine B, biocompatible conjugation allows elevating amplification coefficients towards moderately high values. In particular, Rhodamine B, anchored to the peptide derivative material, demonstrates gain of 22–23 cm−1 for a 10−2 M solution, while a pure dye solution possesses 25% smaller values at the same concentration. New biocompatible fluorescent agents pave ways to demonstrate lasing in living organisms and can be further introduced to therapeutic applications, if proper solvents are found.

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