Plasmonic Nanostars as Efficient Broadband Scatterers for Random Lasing

Ziegler, Johannes; Wörister, Christian; Vidal, Cynthia; Hrelescu, Calin; Klar, Thomas A.

doi:10.1021/acsphotonics.6b00111

Cited by 65 publications

(48 citation statements)

References 45 publications

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“…c) Ensemble extinction spectrum (olive curve) of nanostars in an aqueous solution and dark‐field scattering spectrum (blue curve) of a single nanostar showing intrinsic broadband scattering throughout the visible up to the infrared spectral range. (Reprinted with permission from).…”

Section: Plasmonic Random Lasermentioning

confidence: 99%

Nanolasers Enabled by Metallic Nanoparticles: From Spasers to Random Lasers

Wang

Meng

Kildishev

et al. 2017

Laser & Photonics Reviews

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Owing to exotic optical responses, metallic nanoparticles and nanostructures are finding broad applications in laser science, leading to numerous design variations of plasmonic nanolasers. Nowadays, two of the most intriguing plasmonic nanolasing devices are spasers and random lasers. While a spaser is based on a single metallic nanoparticle resonator with the optical feedback provided by the localized surface plasmon resonance, the operation of a random laser relies on multiple light scattering within randomly distributed metallic nanoparticles. In this paper, an up-to-date review on the applications of metallic nanoparticles in spasers and random lasers is provided. Principles of a random spaser, a device combining the features of a spaser and a random laser, are briefly discussed as well. The paper is focused on major theoretical and experimental approaches to control the core metrics of lasing performance, including threshold, resonant wavelength, and emission directionality. The applications of spasers and random lasers in the fields of sensing and imaging are also mentioned. Finally, the challenges and future perspectives in this area of research are discussed.

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Section: Plasmonic Random Lasermentioning

confidence: 99%

Nanolasers Enabled by Metallic Nanoparticles: From Spasers to Random Lasers

Wang

Meng

Kildishev

et al. 2017

Laser & Photonics Reviews

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“…The core, as an antenna, produces a magnetic field enhancement of the tip plasmons and consequently LSPR can be affected by spike morphology and number. These unique properties can be exploited in many applications like surface‐enhanced Raman spectroscopy (SERS), biosensing, photonic, photo‐thermal therapy, and even for photo‐catalytic applications . To date, due to the increasing demand in specific applications, the design of AuNPs with tailored LSPRs remains an active area of research .…”

Section: Figurementioning

confidence: 99%

“…To prepare NPs suitable for a vast pool of applications, it is crucial to coat their surface with specific functionalization that confers peculiar properties to the nanosystem (i.e. stability in a medium, active targeting or chemical‐physical activity).…”

Section: Figurementioning

confidence: 99%

Fluidic Manufacture of Star‐Shaped Gold Nanoparticles

Silvestri

Lay

Psaro³

et al. 2017

Chemistry A European J

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Star-shaped gold nanoparticles (StarAuNPs) are extremely attractive nanomaterials, characterized by localized surface plasmon resonance which could be potentially employed in a large number of applications. However, the lack of a reliable and reproducible synthetic protocols for the production of StarAuNPs is the major limitation to their spreading. For the first time, here we present a robust protocol to manufacture reproducible StarAuNPs by exploiting a fluidic approach. Star-shaped AuNPs have been synthesized by means of a seed-less protocol, employing ascorbic acid as reducing agent at room temperature. Moreover, the versatility of the bench-top microfluidic protocol has been exploited to afford hydrophilic, hydrophobic and solid-supported engineered StarAuNPs, by avoiding intermediate NP purifications.

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“…Compared to the traditional surface plasmonic resonance random lasers [39] and the reported "hot-spot" effect-based random lasers [20,47], Ag NFbased random lasers have the minimal working threshold of 0.24 MW cm −2 and the smallest linewidth of 0.048 nm when pumped by the nanosecond pulses. Good performance is induced by the interparticle coupling effect and the unique morphology of Ag NFs with the relative small size and abundant nanogaps, which can efficiently enhance the local electromagnetic field.…”

Section: Resultsmentioning

confidence: 94%

“…Further, the randomness of the nanogaps in distribution and size makes the produced Ag NFs as broadband plasmonic scatterers in random lasers covering the whole visible range (350-750 nm). Moreover, Ag NFs are obtained in a growing period of several minutes by a one-step solution-phase synthesis method, which is the most simple and rapid among these scatterers of Ag nanowires, gold nanostars [47], Au-Ag bimetallic nanowires [20], and Ag NFs. In particular, the growing time can be improved by ~70 times with respect to the gold [39] and/or Au-Ag bimetallic nanowires [20].…”

Section: Resultsmentioning

confidence: 99%

Broadband plasmonic silver nanoflowers for high-performance random lasing covering visible region

Chang

Shi

et al. 2017

Nanophotonics

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Multicolor random lasing has broad potential applications in the fields of imaging, sensing, and optoelectronics. Here, silver nanoflowers (Ag NF) with abundant nanogaps are fabricated by a rapid one-step solution-phase synthesis method and are first proposed as effective broadband plasmonic scatterers to achieve different color random lasing. With abundant nanogaps and spiky tips near the surface and the interparticle coupling effect, Ag NFs greatly enhance the local electromagnetic field and induce broadband plasmonic scattering spectra over the whole visible range. The extremely low working threshold and the high-quality factor for Ag NF-based random lasers are thus demonstrated as 0.24 MW cm −2 and 11,851, respectively. Further, coherent colorful random lasing covering the visible range is realized using the dye molecules oxazine (red), Coumarin 440 (blue), and Coumarin 153 (green), showing high-quality factor of more than 10,000. All these features show that Ag NF are highly efficient scatterers for high-performance coherent random lasing and colorful random lasers.

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Plasmonic Nanostars as Efficient Broadband Scatterers for Random Lasing

Cited by 65 publications

References 45 publications

Nanolasers Enabled by Metallic Nanoparticles: From Spasers to Random Lasers

Nanolasers Enabled by Metallic Nanoparticles: From Spasers to Random Lasers

Fluidic Manufacture of Star‐Shaped Gold Nanoparticles

Broadband plasmonic silver nanoflowers for high-performance random lasing covering visible region

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