Lasing from dot-in-rod nanocrystals in planar polymer microcavities

Manfredi, Giovanni; Lova, Paola; Stasio, Francesco Di; Rastogi, Prachi; Krahne, Roman; Comoretto, Davide

doi:10.1039/c8ra01282b

Cited by 29 publications

(45 citation statements)

References 72 publications

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“…For the comparison, we considered a series of polymer DBRs, where the low refractive index material is a fluorinated polymer ( n L ≈ 1.3), which is one of the lowest indexes available on the market . The high index media are instead cellulose acetate (CA, n ≈ 1.46),[7b] poly(methyl methacrylate) (PMMA, n ≈ 1.50), polyacrylic acid (PAA, n ≈ 1.51), polyvinyl alcohol (PVA, n ≈ 1.52), polystyrene (PS, n ≈ 1.58),[7b] and poly( N ‐vinylcarbazole) (PVK, n ≈ 1.68) . Currently, PVK provides one of the highest refractive index available among commodity polymers thanks to the preresonant enhancement from the carbazole group absorption at about 350 nm .…”

Section: Basic Optics Of Dbrsmentioning

confidence: 99%

“…These structures are still a hot topic in photonics for optical fibers, light emitting diodes (LEDs), sensors, photovoltaic devices, lasers, discrete and integrated optical components, lightening, and quantum computing . However, new solution processable photoactive materials (e.g., organic semiconductors, quantum dots, hybrid perovskites, and self‐assembling supramolecular systems) stimulated the development of PhCs grown with organic and colloidal materials by solution and melt processes …”

Section: Introductionmentioning

confidence: 99%

“…From left to right: the use of DBRs in functional architecture, in enhancement of photon absorption for photovoltaic cells and modules, emission control, lasing, and sensing. [7c,13]…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Advances in Functional Solution Processed Planar 1D Photonic Crystals

Lova

Manfredi

Comoretto

2018

Advanced Optical Materials

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170

226

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photonic states (PDOS), [2][3][4] which helps explaining the photoluminescence (PL) changes of materials when embedded in the PhC structure.Traditionally, PhCs have been made carving bulky inorganic dielectrics or sem iconductors. These structures are still a hot topic in photonics for optical fibers, light emitting diodes (LEDs), sensors, photo voltaic devices, lasers, discrete and integrated optical components, lightening, and quantum computing. [6] However, new solution processable photoactive materials (e.g., organic semiconductors, quantum dots, hybrid perovskites, and selfassem bling supramolecular systems) stimulated the development of PhCs grown with organic and colloidal materials by solution and melt processes. [7] Among PhCs, distributed Bragg reflectors (DBRs) are cur rently the most interesting owing to their planar structure which generates a simple optical response that represents a playground to understand deep physical concepts, as described in Sections 2.4 and 4. DBRs are indeed made of alternated thin films of different dielectric materials. This simplicity makes them the only PhCs that can take advantage of large area growths (see Section 3.1). [8] Such fabrication methods are unconceivable with bulky inorganic DBRs and might reduce processing costs and enhance customizability, also on industrial scale, thus adding unprecedented market opportunities. Figure 1 illustrates the evolution and fabrications of solution and melt processed DBRs. The top of the Figure displays three wellknown natural DBRs belonging to animal and plant reigns: the mother of pearl, [9] the Panamanian Tortoise beetle exoskel eton, [10] and the Pollia Condensata skin, [11] whose growth is driven by the thermodynamics of spinodal phase separation. [12] The interest in these natural structures leads to their emulation until the development of solutionbased fabrication methods for flexible synthetic DBRs made of polymers and inorganic nanoparticles (Figure 1). At the base of Figure 1, we also show some applications arose only in the last decades. From left to right: the use of DBRs in functional architecture, in enhance ment of photon absorption for photovoltaic cells and modules, emission control, lasing, and sensing. [7c,13] In this paper we will first briefly review the properties of DBRs and then focus on the reasons that guided the research toward new solutionbased and largearea fabrications, describing current processes used both at the laboratory and largearea scales. We will then review the main applications of these structures comparing the performances of mesoporous inorganic and polymer devices. An overview on the properties and applications of polymer and inorganic planar 1D photonic crystals fabricated from solution is provided here. In the last decades, photonic crystals became technologically relevant for light management, photovoltaics, sensing, and lasing. Such structures are traditionally produced by lithographic and vacuum techniques, but the need to reduce costs and to scale-up the fabrication have lea...

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Section: Basic Optics Of Dbrsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…From left to right: the use of DBRs in functional architecture, in enhancement of photon absorption for photovoltaic cells and modules, emission control, lasing, and sensing. [7c,13]…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Advances in Functional Solution Processed Planar 1D Photonic Crystals

Lova

Manfredi

Comoretto

2018

Advanced Optical Materials

Self Cite

170

226

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show abstract

“…One-dimensional multilayer photonic crystals can be fabricated with many fabrication techniques such as sputtering, spin coating, pulsed laser deposition, chemical etching, and molecular beam epitaxy [14][15][16][17][18]. These structures are useful for several applications, for example lasing [15,19], emission control [20][21][22], and sensing [23][24][25]. Herein, we show one-dimensional photonic crystals alternating TaAs with SiO 2 or TiO 2 and a microcavity where a layer of TaAs is embedded between two SiO 2 -TiO 2 multilayers.…”

Section: Introductionmentioning

confidence: 99%

Tantalum Arsenide-Based One-Dimensional Photonic Structures

2018

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Weyl semimetals can be described as the three-dimensional analogue of graphene, showing linear dispersion around nodes (Weyl points). Tantalum arsenide is among the most studied Weyl semimetals. It has been demonstrated that TaAs has a very high value of the real part of the complex refractive index in the infrared region. In this work we show one-dimensional photonic crystals alternating TaAs with SiO 2 or TiO 2 and a microcavity where a layer of TaAs is embedded between two SiO 2 -TiO 2 multilayers.

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Universal Design Rules for Flory–Huggins Polymer Photonic Vapor Sensors

Megahd

Lova

Comoretto

2020

Adv Funct Materials

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Multilayered photonic sensors that rely on polymer‐solvent Flory–Huggins interactions are drawing increasing interest owing to their broad‐band selectivity, even among mixtures, without the need for chemical targeting. Moreover, these sensors provide simple colorimetric responses, and easy, quick fabrication both on laboratory and industrial scales. However, complex optical responses and slow response times are limiting their development. In this work, the behavior of different photonic sensor architectures is analyzed to speed up response time and define a strategy to simplify their spectral behavior. To this end, the effect of interfaces, materials order, and thickness on the diffusion kinetics of a single reference analyte in the multilayered sensors is studied to design the optimal structure.

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Lasing from dot-in-rod nanocrystals in planar polymer microcavities

Abstract: We report on the production of an optically pumped vertical cavity laser made by polymer mirrors embedding inorganic core@shell nanocrystals.

Cited by 29 publications

References 72 publications

Advances in Functional Solution Processed Planar 1D Photonic Crystals

Advances in Functional Solution Processed Planar 1D Photonic Crystals

Tantalum Arsenide-Based One-Dimensional Photonic Structures

Universal Design Rules for Flory–Huggins Polymer Photonic Vapor Sensors

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