Distributed feedback lasing from dye-doped glass films using photopatterned gold nanoparticles

Fukushima, Masanori; Yanagi, Hisao; Hayashi, Shinji; Suganuma, Naotoshi; Taniguchi, Yoshio

doi:10.1063/1.1886270

Cited by 8 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, metallic nanoparticles (NPs) with periodic arrangement can act as a grating and lead to distributed feedback lasers by the effects of enhanced localized surface plasmon resonance and scattering [ 22 , 23 , 24 , 25 ]. The plasmonic resonance of metallic nanoparticles shows effects on random lasing output from visible to near-infrared ranges due to the enhancement of SPR and scattering in microcavities [ 26 , 27 , 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Large-Area Biocompatible Random Laser for Wearable Applications

Guo

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

Recently, wearable sensor technology has drawn attention to many health-related appliances due to its varied existing optical, electrical, and mechanical applications. Similarly, we have designed a simple and cheap lift-off fabrication technique for the realization of large-area biocompatible random lasers to customize wearable sensors. A large-area random microcavity comprises a matrix element polymethyl methacrylate (PMMA) in which rhodamine B (RhB, which acts as a gain medium) and gold nanorods (Au NRs, which offer plasmonic feedback) are incorporated via a spin-coating technique. In regards to the respective random lasing device residing on a heterogenous film (area > 100 cm2), upon optical excitation, coherent random lasing with a narrow linewidth (~0.4 nm) at a low threshold (~23 μJ/cm2 per pulse) was successfully attained. Here, we maneuvered the mechanical flexibility of the device to modify the spacing between the feedback agents (Au NRs), which tuned the average wavelength from 612.6 to 624 nm under bending while being a recoverable process. Moreover, the flexible film can potentially be used on human skin such as the finger to serve as a motion and relative-humidity sensor. This work demonstrates a designable and simple method to fabricate a large-area biocompatible random laser for wearable sensing.

show abstract

Section: Introductionmentioning

confidence: 99%

Large-Area Biocompatible Random Laser for Wearable Applications

Guo

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…Periodic distribution of metal NPs in a polymer matrix can also be obtained by the method of in situ formation. In this case formation of NPs occurs upon exposure to the interference pattern [26][27][28]. To this aim metal salts and other additional reagents (metal precursors) are incorporated in a matrix during material preparation.…”

Section: Introductionmentioning

confidence: 99%

“…Heat treatment of the sample at 550 • C for 1 h has been used for the Au nanoparticle production in the laser illuminated areas. In [26] a metal precursor was introduced into a sol solution, then HAuCl 4 -doped SiO 2 /TiO 2 films were prepared by the sol-gel method. Photoreduction has been realized by illuminating the film with the emission of an He-Cd laser (λ = 325 nm, 30 mW) for 2 h. The structures obtained require additional fixation.…”

Section: Introductionmentioning

confidence: 99%

The fabrication of periodic polymer/silver nanoparticle structures:in situreduction of silver nanoparticles from precursor spatially distributed in polymer using holographic exposure

et al. 2009

View full text Add to dashboard Cite

A new approach to producing volume periodic polymer-metal nanoparticle structures is presented. Periodic distribution of Ag nanoparticles in a polymer film can be obtained by applying the holographic patterning in the UV or visible spectral range to the composite material comprising photocurable monomers, photoinitiators and a solution of silver nitrate in acetonitrile. Photopolymerization of the composite in the interference pattern provides formation of a highly efficient volume grating composed of periodic polymer regions and Ag precursor-containing regions. Subsequent homogeneous UV irradiation and/or thermo-treatment of the grating causes reduction of silver ions to Ag nanoparticles in the areas of the film containing the metal precursor. Spectroscopic measurements confirm the formation of the nanoparticles in the gratings. Transmission electron microscopy showed a regular spatial distribution of well-defined Ag nanoparticles in a polymer film with a periodicity governed by the geometry of holographic structuring. The average diameter of nanoparticles can be controlled by the wavelength and intensity of holographic exposure as well as the composite formulation. A possible mechanism of silver nanoparticle formation by free radicals as reducing agents is presented.

show abstract

Fabrication of luminescent disc-shaped microstructures via wet-chemical etching of hybrid sol–gel layers for potential photonic applications

Duda,

Rola,

Łukomski

et al. 2024

J Mater Sci

View full text Add to dashboard Cite

Sol–gel materials based on SiO2 and TiO2 precursors are attractive as a new platform for planar photonics. Particularly interesting are those based on organically modified silica (ORMOSIL), which may improve the luminescent properties of organic dyes. However, their microstructurization remains a challenge as it requires optimization of various technological stages. Here, we report the structurization of thin layers based on ORMOSIL precursor and titanium(IV) ethoxide (TET) containing luminescent rhodamine B (RhB) dye. Films were fabricated using sol–gel synthesis and dip-coating method. Depending on the time of annealing performed at 200 °C, layers with different thicknesses (300–760 nm) and refractive indices (RI) (1.51–1.68) were obtained. Combining photolithography and wet-chemical etching processes made it possible to fabricate well-separated sol–gel waveguides and discs of different diameters. The etching time in buffered hydrofluoric acid (BHF) affected the depth of the etched luminescent microstructures. Additionally, it was found that a longer layer’s annealing time increased the etching selectivity of the substrate over the sol–gel layer. This enabled the obtaining of under-etched sol–gel goblet microstructures. Selected samples were investigated using scanning electron microscopy (SEM). UV–Vis photoluminescence measurements showed that long heat treatment also influenced the emission spectrum’s shape. The stability of the films under ambient conditions was established using spectroscopic ellipsometry. It was proven that films heat-treated at 200 °C did not change their properties during storage time of around 2 months. Relatively high RI, luminescent properties, and structurization potential make these microstructures interesting for application in integrated photonic devices, e.g., light amplifiers or sensing systems.

show abstract

Distributed feedback lasing from dye-doped glass films using photopatterned gold nanoparticles

Cited by 8 publications

References 11 publications

Large-Area Biocompatible Random Laser for Wearable Applications

Large-Area Biocompatible Random Laser for Wearable Applications

The fabrication of periodic polymer/silver nanoparticle structures:in situreduction of silver nanoparticles from precursor spatially distributed in polymer using holographic exposure

Fabrication of luminescent disc-shaped microstructures via wet-chemical etching of hybrid sol–gel layers for potential photonic applications

Contact Info

Product

Resources

About