Effect of molecular concentration on spectroscopic properties of poly(methyl methacrylate) thin films doped with rhodamine 6G dye

On, C.; Tanyi, E. K.; Harrison, Emily R.; Noginov, M. A.

doi:10.1364/ome.7.004286

Cited by 26 publications

(12 citation statements)

References 18 publications

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“…It is worth mentioning that previous works report the emission spectra of MR dye exhibiting the mirror-image characteristics of those of the absorption spectra. 37,40,41 The emission spectra were reported to have two peaks at 450 nm and 600 nm, and the dominant peak showed a red shift at an increased dye concentration, which is somewhat consistent with our optical measurement data. 37,40,41 Our results show that dye films include H and Jaggregates, and intermolecular interactions play a decisive role in the photophysical properties of the film as reported previously.…”

Section: Optical Characterization Of Methyl Red Dye and Dye Based Sol...supporting

confidence: 91%

Nanoscale mapping of wavelength-selective photovoltaic responses in H- and J-aggregates of azo dye-based solar cell films

et al. 2021

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Section: Optical Characterization Of Methyl Red Dye and Dye Based Sol...supporting

confidence: 91%

Nanoscale mapping of wavelength-selective photovoltaic responses in H- and J-aggregates of azo dye-based solar cell films

et al. 2021

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“…Several models have been developed to analyze this behavior, e.g. 7 . Here we use moderately low concentration to ensure a minor impact of the probable aggregation.…”

Section: Resultsmentioning

confidence: 99%

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

Machnev

Ofer

Shishkin

et al. 2021

Sci Rep

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Bioinspired 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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“…At the high molecular concentration used in our experiments (2.69 × 10 20 cm −3 in solid state), rhodamine 6G has (i) a strong absorption band ( λ ≈536 nm) and a shoulder ( λ ≈506 nm) attributed to the electronic singlet–singlet (S 0 →S 1 ) and vibronic transitions, respectively; (ii) a weaker absorption maximum at λ ≈345 nm (S 0 →S 2 transition); and (iii) multiple absorption bands at shorter wavelengths . The positions of the S 0 →S 1 and S 0 →S 2 absorption transitions are indicated in Figure b and d with dashed lines.…”

Section: Cavity Designmentioning

confidence: 87%

“…The positions of the S 0 →S 1 and S 0 →S 2 absorption transitions are indicated in Figure b and d with dashed lines. At the same high dye concentration, the Stokes‐shifted S 1 →S 0 emission band has a maximum at 600 nm …”

Section: Cavity Designmentioning

confidence: 99%

Coupling of the First and Second Excited States of R6G Dye with the Fabry–Perot Cavity

Tanyi

Harrison

et al. 2018

Physica Status Solidi (b)

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Coupling of macroscopic ensembles of highly concentrated R6G molecules with aluminum and silver Fabry–Perot cavities of different sizes, in which one or two standing wave modes are in resonance with the absorption transition(s) of the dye molecules, have been studied. (i) It has been found that strong coupling of the cavity with one molecular eigenstate (S0→S1 transition) does not perturb the energies of the other molecular states. (ii) The S0→S2 absorption transition is too weak to strongly couple to the resonant cavity (“λ” standing wave mode). However, the resonant cavity causes a blue shift of the S0→S2 excitation band. (iii) The splitting of the dispersion curve is theoretically predicted and experimentally observed at strong coupling of the cavity resonance (“λ” standing wave mode) with the material resonances of Ag, including bound electron and “epsilon equal zero” transitions.

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Effect of molecular concentration on spectroscopic properties of poly(methyl methacrylate) thin films doped with rhodamine 6G dye

Cited by 26 publications

References 18 publications

Nanoscale mapping of wavelength-selective photovoltaic responses in H- and J-aggregates of azo dye-based solar cell films

Nanoscale mapping of wavelength-selective photovoltaic responses in H- and J-aggregates of azo dye-based solar cell films

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

Coupling of the First and Second Excited States of R6G Dye with the Fabry–Perot Cavity

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