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Optical gain and photo-bleaching of organic dyes, quantum dots, perovskite nanoplatelets and nanodiamonds [Elektronski vir]Vellaichamy, Mahendran ; Škarabot, Miha ; Muševič, IgorOptical gain and resistance against photo-bleaching are key material parameters for practical applications in microlasers and microphotonics. Here, we present studies of optical amplification and ... photo-bleaching in a wide range of optical gain materials, including fluorescent dyes, quantum dots and rods, organic and inorganic room temperature polaritons, and nanodiamonds with emission range from 430 to 680 nm. We used amplified spontaneous emission (ASE) for each material to measure the optical gain. Robustness against photo-bleaching was determined by measuring the intensity of spontaneous emission of the material as a function of the number of excitation femtosecond pulses (106–1010) at various excitation energy densities. We show that pyrromethene laser dyes are the best organic emitters in terms of low excitation energy and good optical gain, whereas solid-state polariton materials are better in terms of high optical gain and stability. We found that all organic and inorganic optical gain materials bleach completely after 106–109 illumination pulses with typical 0.1–0.6 GW/cm2 peak power density, with an exception of nanodiamonds. We show that nanodiamonds are the only optical gain material that shows no photo-bleaching beyond the 1010 excitation pulses of 300 fs pulse duration and with 0.16 GW/cm2 peak power density.Source: Liquid crystals [Elektronski vir]. - ISSN 1366-5855 (Vol. 50, iss. 6, 2023, str. 935-956)Type of material - e-article ; adult, seriousPublish date - 2023Language - englishCOBISS.SI-ID - 147822851
Author
Vellaichamy, Mahendran |
Škarabot, Miha |
Muševič, Igor
Topics
optical gain |
photostability |
dyes |
anthracene |
nanodiamonds |
quantum dots |
quantum rods |
optična ojačitev |
fotostabilnost |
barvila |
antracen |
diamantni naodelci |
kvantne pike |
kvantne palčke
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Vellaichamy, Mahendran | 55369 |
Škarabot, Miha | 12338 |
Muševič, Igor | 09089 |
Source: Personal bibliographies
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