Random laser emission at dual wavelengths in a donor-acceptor dye mixture solution
The work was aimed to generate random laser emissions simultaneously at two wavelengths in a weakly scattering system containing mixture of binary dyes, rhodamine-B (Rh-B) and oxazine-170 (O-170) dispersed with ZnO nano-particles serving as scattering centres. Random lasing performances for individu...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-01-01
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| Series: | Results in Physics |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379716303229 |
| _version_ | 1818022087659356160 |
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| author | Sunita Kedia Sucharita Sinha |
| author_facet | Sunita Kedia Sucharita Sinha |
| author_sort | Sunita Kedia |
| collection | DOAJ |
| description | The work was aimed to generate random laser emissions simultaneously at two wavelengths in a weakly scattering system containing mixture of binary dyes, rhodamine-B (Rh-B) and oxazine-170 (O-170) dispersed with ZnO nano-particles serving as scattering centres. Random lasing performances for individual Rh-B dye were extensively studied for varying small signal gain/scatterer density and we found lasing threshold to significantly depend upon number density of dispersed nano-particles. In spite of inefficient pumping, we demonstrated possibility of random lasing in O-170 dye solution on account of resonance energy transfer from Rh-B dye which served as donor. At optimum concentrations of fluorophores and scatterer in dye mixture solution, incoherent random lasing was effectively attained simultaneously at two wavelengths centered 90 nm apart. Dual-emission intensities, lasing thresholds and rate of amplifications could be controlled and made equivalent for both donor and acceptor in dye mixture solution by appropriate choice of concentrations of dyes and scatterers. Keywords: Random lasing, Energy transfer, Rhodamine-B, Oxazine-170, Zinc oxide |
| first_indexed | 2024-04-14T08:27:38Z |
| format | Article |
| id | doaj.art-1213272f2a8c4986bb70d42234c7149f |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-04-14T08:27:38Z |
| publishDate | 2017-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-1213272f2a8c4986bb70d42234c7149f2022-12-22T02:04:00ZengElsevierResults in Physics2211-37972017-01-017697704Random laser emission at dual wavelengths in a donor-acceptor dye mixture solutionSunita Kedia0Sucharita Sinha1Corresponding author.; Laser and Plasma Surface Processing Section, Bhabha Atomic Research Centre, Mumbai 400 085, IndiaLaser and Plasma Surface Processing Section, Bhabha Atomic Research Centre, Mumbai 400 085, IndiaThe work was aimed to generate random laser emissions simultaneously at two wavelengths in a weakly scattering system containing mixture of binary dyes, rhodamine-B (Rh-B) and oxazine-170 (O-170) dispersed with ZnO nano-particles serving as scattering centres. Random lasing performances for individual Rh-B dye were extensively studied for varying small signal gain/scatterer density and we found lasing threshold to significantly depend upon number density of dispersed nano-particles. In spite of inefficient pumping, we demonstrated possibility of random lasing in O-170 dye solution on account of resonance energy transfer from Rh-B dye which served as donor. At optimum concentrations of fluorophores and scatterer in dye mixture solution, incoherent random lasing was effectively attained simultaneously at two wavelengths centered 90 nm apart. Dual-emission intensities, lasing thresholds and rate of amplifications could be controlled and made equivalent for both donor and acceptor in dye mixture solution by appropriate choice of concentrations of dyes and scatterers. Keywords: Random lasing, Energy transfer, Rhodamine-B, Oxazine-170, Zinc oxidehttp://www.sciencedirect.com/science/article/pii/S2211379716303229 |
| spellingShingle | Sunita Kedia Sucharita Sinha Random laser emission at dual wavelengths in a donor-acceptor dye mixture solution Results in Physics |
| title | Random laser emission at dual wavelengths in a donor-acceptor dye mixture solution |
| title_full | Random laser emission at dual wavelengths in a donor-acceptor dye mixture solution |
| title_fullStr | Random laser emission at dual wavelengths in a donor-acceptor dye mixture solution |
| title_full_unstemmed | Random laser emission at dual wavelengths in a donor-acceptor dye mixture solution |
| title_short | Random laser emission at dual wavelengths in a donor-acceptor dye mixture solution |
| title_sort | random laser emission at dual wavelengths in a donor acceptor dye mixture solution |
| url | http://www.sciencedirect.com/science/article/pii/S2211379716303229 |
| work_keys_str_mv | AT sunitakedia randomlaseremissionatdualwavelengthsinadonoracceptordyemixturesolution AT sucharitasinha randomlaseremissionatdualwavelengthsinadonoracceptordyemixturesolution |