Spectral narrowing in a subwavelength solid-state laser
The association of metallic nanostructures and solid-state gain media has recently led to the emergence of functional platforms for nanolasing with relevant features such as chemical and thermal stability and the absence of photobleaching. In this work, we demonstrate that the incorporation of plasm...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/717892 |
| Acceso en línea: | http://hdl.handle.net/10486/717892 https://dx.doi.org/10.1021/acsphotonics.9b00836 |
| Access Level: | acceso abierto |
| Palabra clave: | Ag nanoparticle chains LiNbO 3 line narrowing Nd solid-state laser 3+ plasmonic nanolaser Materiales / Ciencia de los Materiales |
| Sumario: | The association of metallic nanostructures and solid-state gain media has recently led to the emergence of functional platforms for nanolasing with relevant features such as chemical and thermal stability and the absence of photobleaching. In this work, we demonstrate that the incorporation of plasmonic nanoparticle chains on a Nd3+-doped solid-state laser platform enables nanoscale laser emission at the technologically relevant spectral region of telecom (λe = 1385 nm), outside the spectral response of the plasmonic resonance of the nanoparticle chains. In addition, we experimentally show that the plasmonic chains improve the monochromaticity of the solid-state laser, thus, attaining spectral narrowing of the laser line by up to 38% depending on the pump wavelength. The effect of the plasmon driven absorption enhancement in the vicinities of the Ag nanoparticle chains is analyzed by tuning the optical pump in a broad spectral range (580-890 nm) at different Nd3+ transitions that overlap the spectral response of the longitudinal plasmonic mode of the chain. Theoretical insight shows that the plasmon-induced narrowing of the laser linewidth close to the nanoparticle chains can be related to the modification of the effective pump rate within the active medium, which is produced by the excitation of the localized plasmonic mode. The work constitutes a step forward in the development of high-quality and highly integrated photonic devices featuring narrowband laser emission in ultrasmall volumes operating in a technologically relevant spectral range. Copyright © 2019 American Chemical Society |
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