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Bavali A, Rahmatpanahi A, Niknam Z. Anisotropic behavior of random lasing in a highly concentrated dye solution. OPTICS EXPRESS 2022; 30:15685-15696. [PMID: 35473283 DOI: 10.1364/oe.454376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 03/28/2022] [Indexed: 06/14/2023]
Abstract
Angular dependence of the diffusive random laser (DRL) emission is assessed due to excitation of a highly concentrated solution of Rhodamine 6G (Rd6G) comprising monomers and dimers. Dimerization at extremely high concentrations leads to the random fluctuation of the dielectric constant in gain medium. As a result, aggregated dye molecules provide multiple scattering events for propagating photons which is confirmed by enhanced backscattering (EBS) test. This scattering feedback besides Försteŕs resonance energy transfer (FRET) from monomers to dimers provide RL spikes over low quantum yield dimeric fluorescence spectra. The unique spectral feature of RL emission is strong dependence on the angle of detection that results from anisotropic inner filter effect (IFE) within the gain volume due to local excitation of the medium by a pencil-like beam of laser. The results have a merit of importance in optical characterization of the media in which the fluorophores can aggregate significantly.
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Whispering-Gallery-Mode for Coherent Random Lasing in a Dye-Doped Polystyrene Encapsulated Silica-Glass Capillary. Processes (Basel) 2020. [DOI: 10.3390/pr8121578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Dye-doped polystyrene (DDPS) encapsulated in a silica-glass capillary with a diameter of 300 μm was fabricated through radical polymerization of styrene within the capillary. The coherent random lasing (RL) with full width at half maximum (FWHM) of 0.36 nm and a quality factor of 1608 was produced in the DDPS with the capillary when pumping at 532 nm. However, the incoherent RL with FWHM of 6.62 nm and a quality factor of 92 was produced in the DDPS without the capillary. A detailed investigation on this phenomenon by changing the diameter of the capillary and core refractive index (RI) reveals that there exists a strong whispering gallery mode (WGM) resonance in the capillary, which helps generate the coherent RL. The findings may open up a new approach for the fabrication of highly efficient photonic devices.
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Zhang ZZ, Yin LC, Xu XL, Xia JY, Xie K, Zou G, Zhang XJ, Hu ZJ, Zhang QJ. Near-field scattering enhancement of perylene based aggregates for random lasing. CHINESE J CHEM PHYS 2019. [DOI: 10.1063/1674-0068/cjcp1807167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Zhen-zhen Zhang
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Department of Chemistry, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - Lei-cheng Yin
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Department of Chemistry, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - Xiao-long Xu
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Department of Chemistry, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - Jiang-ying Xia
- School of Instrument Science and Opto-electronic Engineering, Hefei University of Technology, Hefei 230009, China
| | - Kang Xie
- School of Instrument Science and Opto-electronic Engineering, Hefei University of Technology, Hefei 230009, China
| | - Gang Zou
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Department of Chemistry, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - Xiao-juan Zhang
- Aston Institute of Photonic Technologies, Aston University, Birmingham B47ET, UK
| | - Zhi-jia Hu
- School of Instrument Science and Opto-electronic Engineering, Hefei University of Technology, Hefei 230009, China
- Aston Institute of Photonic Technologies, Aston University, Birmingham B47ET, UK
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621000, China
| | - Qi-jin Zhang
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Department of Chemistry, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei 230026, China
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Yin L, Liang Y, Yu B, Wu Y, Ma J, Xie K, Zhang W, Zou G, Hu Z, Zhang Q. Quantitative analysis of “Δl = l s − l g” to coherent random lasing in solution systems with a series of solvents ordered by refractive index. RSC Adv 2016. [DOI: 10.1039/c6ra19029d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Random laser action affected by solvents ordered by refractive index in solution system.
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