Thresholds for nonlinear recording of fluorescent centers in chromone-doped polymer films

• Published in: Optical and quantum electronics Vol. 49; no. 2; pp. 1 - 8
• Main Authors: Ayt, A. O., Barachevsky, V. A., Duensing, A., Fomicheva, Ya. Yu, Gagarskiy, S. V., Iglev, H., Kiyko, V. V., Krayushkin, M. M., Sergeev, A. N., Veniaminov, A. V., Zakharov, V. V.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.02.2017; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Computer Communication Networks; Cross-sections; Electrical Engineering; Fundamentals of Laser Assisted Micro- & Nanotechnologies; Lasers; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Polymethyl methacrylate; Fluorescence; Chromone; Two-photon excitation; Photosensitive organic compounds; Data recording; Archive memory
• ISSN: 0306-8919; 1572-817X
• DOI: 10.1007/s11082-017-0900-3

Nonlinear recording of stable fluorescent microstructures in PMMA films doped with photosensitive compound 2-(furan-2-yl)-3-(thiophen-2-carbonyl)-chromen-4-one is investigated. Energy and power density thresholds for recording stable fluorescent marks and for film destruction and photobleaching of the fluorescent marks by laser pulses were measured in wide spectral (from 530 to 620 nm) and temporal (from 80 to 7 ns) ranges. The evidences of the sequential two-step excitation mechanism for the studied dye are presented. It was shown that picosecond pulse duration range is preferable for two-photon data recording. Quasi-Gaussian and donut shaped fluorescent marks with almost the same cross-section were recorded by femtosecond pulses with rather small difference in energies.