Optical gain and photo-bleaching of organic dyes, quantum dots, perovskite nanoplatelets and nanodiamonds

Mahendran, Vellaichamy (avtor), Škarabot, Miha (avtor), Muševič, Igor (avtor)

Optical 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 (10$^6$–10$^{10}$) 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 10$^6$–10$^9$ illumination pulses with typical 0.1–0.6 GW/cm$^2$ 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 10$^{10}$ excitation pulses of 300 fs pulse duration and with 0.16 GW/cm$^2$ peak power density.

• Jezik: Angleški jezik
• Ključne besede: optical gain, photostability, dyes, anthracene, nanodiamonds, quantum dots, quantum rods
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2023
• Št. strani: Str. 935-956
• Številčenje: Vol. 50, no. 6
• PID: 20.500.12556/RUL-152327
• UDK: 535
• ISSN pri članku: 1366-5855
• DOI: 10.1080/02678292.2023.2188614
• COBISS.SI-ID: 147822851
• Datum objave v RUL: 20.11.2023

Gradivo je del revije

• Naslov: Liquid crystals
• Skrajšan naslov: Liq. cryst.
• Založnik: Taylor & Francis
• ISSN: 1366-5855
• COBISS.SI-ID: 18299943

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: optična ojačitev, fotostabilnost, barvila, antracen, diamantni nanodelci, kvantne pike, kvantne palčke

Projekti

• Financer: EC - European Commission
• Program financ.: H2020
• Številka projekta: 884928
• Naslov: Light-operated logic circuits from photonic soft-matter
• Akronim: LOGOS