Broadband highly directive 3D nanophotonic lenses

Johlin, Eric; Mann, Sander A.; Kasture, Sachin; Koenderink, A. Femius; Garnett, Erik C.

doi:10.1038/s41467-018-07104-1

Cited by 28 publications

(30 citation statements)

References 53 publications

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“…Conversely, Fig. 4d and 4e confirm an effective redirection into small angles achieved in the microdevices, competitive with what shown in much more complex structures [43]. In the last cases, the slight misalignment of the bright spots is evidence of the not perfectly cen-tred emitter, which owes both to the 3DLW process and to the uncertainty in the fluorophore position within the Ac nanocrystal.…”

Section: Record-high Photon Flux From a Single Molecule At Low Temper...supporting

confidence: 52%

Quantum optics with single molecules in a three-dimensional polymeric platform

Colautti,

Lombardi,

Trapuzzano

et al. 2019

Preprint

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The successful development of future photonic quantum technologies heavily depends on the possibility of realizing robust, reliable and, crucially, scalable nanophotonic devices. In integrated networks, quantum emitters can be deployed as single-photon sources or non-linear optical elements, provided their transition linewidth is broadened only by spontaneous emission. However, conventional fabrication approaches are hardly scalable, typically detrimental for the emitter coherence properties and bear limitations in terms of geometries and materials. Here we introduce an alternative platform, based on molecules embedded in polymeric photonic structures. Three-dimensional patterns are achieved via direct laser writing around selected molecular emitters, which preserve near-Fourier-limited fluorescence. By using an integrated polymeric design, record-high photon fluxes from a single cold molecule are reported. The proposed technology allows to conceive a novel class of quantum devices, including integrated multi-photon interferometers, arrays of indistinguishable single photon sources and hybrid electro-optical nanophotonic devices.

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Section: Record-high Photon Flux From a Single Molecule At Low Temper...supporting

confidence: 52%

Quantum optics with single molecules in a three-dimensional polymeric platform

Colautti,

Lombardi,

Trapuzzano

et al. 2019

Preprint

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“…Surprisingly, the issues of light extraction and beam forming for nanoscale emitters are usually still treated separately, even though SILs are frequently manufactured by direct laser writing (DLW)-a versatile technique capable of printing lenses of virtually any shape. To our knowledge, the only approach to date for simultaneously addressing both problems for nanoscale point emitters has been to employ an evolutionary algorithm for light extraction from a nanowire, designed specifically to minimise the footprint of the structure 15 .…”

Section: Introductionmentioning

confidence: 99%

Ultra-long-working-distance spectroscopy of single nanostructures with aspherical solid immersion microlenses

et al. 2020

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In light science and applications, equally important roles are played by efficient light emitters/detectors and by the optical elements responsible for light extraction and delivery. The latter should be simple, cost effective, broadband, versatile and compatible with other components of widely desired micro-optical systems. Ideally, they should also operate without high-numerical-aperture optics. Here, we demonstrate that all these requirements can be met with elliptical microlenses 3D printed on top of light emitters. Importantly, the microlenses we propose readily form the collected light into an ultra-low divergence beam (half-angle divergence below 1°) perfectly suited for ultra-longworking-distance optical measurements (600 mm with a 1-inch collection lens), which are not accessible to date with other spectroscopic techniques. Our microlenses can be fabricated on a wide variety of samples, including semiconductor quantum dots and fragile van der Waals heterostructures made of novel two-dimensional materials, such as monolayer and few-layer transition metal dichalcogenides.

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“…42 Here, we demonstrate that multiplication of identical-shaped meta-atoms with simple geometry are able to improve the device performance, taking advantage of the inter-atom coupling between meta-atoms. By utilising genetic algorithm (GA), 44 a metaheuristic algorithm widely used in optical design, [21][22][23][25][26][27][37][38][39] we apply the concept of meta-atom multiplication to two widely-investigated applications: broadband absorption and structural colour generation.…”

Section: Introductionmentioning

confidence: 99%

Genetic-Algorithm-Aided Meta-Atom Multiplication for Improved Absorption and Coloration in Nanophotonics

Liu

Maier

2020

ACS Photonics

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For a repertoire of nanophotonic systems including photonic crystals, metasurfaces and plasmonic structures, unit cell with a single element is conventionally used for the simplicity of design. The extension of the unit cell with multiple meta-atoms drastically enlarges the parameter space and consequently provides potential configurations with improved device performance. Simultaneously, the multiplication does not induce additional complexity for lithography-based fabrications. However, the substantially increased number of parameters makes the design methodology based on physical intuition and parameter sweep impractical. Here, we show that expanding the number of meta-atoms in the unit cell significantly improves the performance of nanophotonic 1 systems, by the virtue of a genetic algorithm based optimiser. Our approach includes physical intuition endowed in the geometry of meta-atoms, providing additional physical understanding of optimisation process. We demonstrate two photonic applications, including prominent enhancement of a broadband absorption and enlargement of the colour coverage of plasmonic nanostructures. Not limited to the two proof-of-concept demonstrations, this methodology can be applied to all meta-atom based nanophotonic systems including plasmonic near-field enhancement, nonlinear frequency conversion, as well a simultaneous control of phase and polarisation for metasurfaces.

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Broadband highly directive 3D nanophotonic lenses

Cited by 28 publications

References 53 publications

Quantum optics with single molecules in a three-dimensional polymeric platform

Quantum optics with single molecules in a three-dimensional polymeric platform

Ultra-long-working-distance spectroscopy of single nanostructures with aspherical solid immersion microlenses

Genetic-Algorithm-Aided Meta-Atom Multiplication for Improved Absorption and Coloration in Nanophotonics

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