Narrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect

Abstract This study reports the first experimental observation of cascaded stimulated Raman scattering (SRS) generation in a colloidal disordered medium. Generation of the cascaded effect requires both a high Raman gain and pump power in the disordered medium. Here, to extend effective path lengths...

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Autores principales:	Mandana Sadat Hosseini, Elnaz Yazdani, Batool Sajad
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/09d818c4ab374eaba213e6dfbbe48553
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spelling	oai:doaj.org-article:09d818c4ab374eaba213e6dfbbe485532021-11-08T10:48:56ZNarrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect10.1038/s41598-021-01354-82045-2322https://doaj.org/article/09d818c4ab374eaba213e6dfbbe485532021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01354-8https://doaj.org/toc/2045-2322Abstract This study reports the first experimental observation of cascaded stimulated Raman scattering (SRS) generation in a colloidal disordered medium. Generation of the cascaded effect requires both a high Raman gain and pump power in the disordered medium. Here, to extend effective path lengths of photons into the Raman gain medium for producing additional SRS processes, ZnO microspheres with abundant nano-protrusions as suitable scattering centers are proposed. It is explained that nano-protrusions on the surface of the spheres can act as nano reflectors and significantly provide potent feedback in the disordered system. This provided feedback via nano-protrusions boosts cascaded SRS generation to allow the appearance of higher Raman signals of Rhodamine 6G dye solution at a low scatterer concentration of 5 mg/ml. The threshold for the formation of the first Raman signal is measured at about 60 mJ/pulse. Also, the evolution of Raman signals under several fixed pump pulses is examined to investigate the stability from pulse to pulse. Our findings provide promising perspectives for achieving the single-frequency laser sources and generate desirable wavelengths for specific applications.Mandana Sadat HosseiniElnaz YazdaniBatool SajadNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mandana Sadat Hosseini Elnaz Yazdani Batool Sajad Narrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect
description	Abstract This study reports the first experimental observation of cascaded stimulated Raman scattering (SRS) generation in a colloidal disordered medium. Generation of the cascaded effect requires both a high Raman gain and pump power in the disordered medium. Here, to extend effective path lengths of photons into the Raman gain medium for producing additional SRS processes, ZnO microspheres with abundant nano-protrusions as suitable scattering centers are proposed. It is explained that nano-protrusions on the surface of the spheres can act as nano reflectors and significantly provide potent feedback in the disordered system. This provided feedback via nano-protrusions boosts cascaded SRS generation to allow the appearance of higher Raman signals of Rhodamine 6G dye solution at a low scatterer concentration of 5 mg/ml. The threshold for the formation of the first Raman signal is measured at about 60 mJ/pulse. Also, the evolution of Raman signals under several fixed pump pulses is examined to investigate the stability from pulse to pulse. Our findings provide promising perspectives for achieving the single-frequency laser sources and generate desirable wavelengths for specific applications.
format	article
author	Mandana Sadat Hosseini Elnaz Yazdani Batool Sajad
author_facet	Mandana Sadat Hosseini Elnaz Yazdani Batool Sajad
author_sort	Mandana Sadat Hosseini
title	Narrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect
title_short	Narrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect
title_full	Narrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect
title_fullStr	Narrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect
title_full_unstemmed	Narrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect
title_sort	narrow-band random raman lasing from rhodamine 6g assisted by cascaded stimulated raman scattering effect
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/09d818c4ab374eaba213e6dfbbe48553
work_keys_str_mv	AT mandanasadathosseini narrowbandrandomramanlasingfromrhodamine6gassistedbycascadedstimulatedramanscatteringeffect AT elnazyazdani narrowbandrandomramanlasingfromrhodamine6gassistedbycascadedstimulatedramanscatteringeffect AT batoolsajad narrowbandrandomramanlasingfromrhodamine6gassistedbycascadedstimulatedramanscatteringeffect
_version_	1718442586221314048

Narrow-band random Raman lasing from Rhodamine 6G assisted by cascaded stimulated Raman scattering effect

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