Bloch-surface-wave photonic crystal nanobeam cavity

Perani, Tommaso; Aurelio, Daniele; Liscidini, Marco

doi:10.1364/ol.44.005133

Cited by 16 publications

(11 citation statements)

References 22 publications

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“…Besides the advantages of tuning the BSWs’ spectral position, polarization [ 44 ], as well as propagation and penetration lengths [ 45 ], one of the most intriguing features offered by 1DPC-based platforms is the possibility to exploit the 1DPC surface to set up an accessible framework for controlling light–matter interaction. Furthermore, shallow patterning of the 1DPC surface allows the BSW to be manipulated and possibly confined along transverse directions [ 40 , 46 ], thus providing new degrees of freedom for exploring complex phenomena. Having a photonic mode confined both out-of-plane and in-plane on a surface is advantageous when alleviating some difficulties in technological tasks such as the integration of emitters/absorbers, which are typically buried/grown within the photonic structure itself, where the radiation energy of photonic modes is generally localized.…”

Section: Introductionmentioning

confidence: 99%

Bloch Surface Waves in Open Fabry–Perot Microcavities

et al. 2023

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Thanks to the increasing availability of technologies for thin film deposition, all-dielectric structures are becoming more and more attractive for integrated photonics. As light–matter interactions are involved, Bloch Surface Waves (BSWs) may represent a viable alternative to plasmonic platforms, allowing easy wavelength and polarization manipulation and reduced absorption losses. However, plasmon-based devices operating at an optical and near-infrared frequency have been demonstrated to reach extraordinary field confinement capabilities, with localized mode volumes of down to a few nanometers. Although such levels of energy localization are substantially unattainable with dielectrics, it is possible to operate subwavelength field confinement by employing high-refractive index materials with proper patterning such as, e.g., photonic crystals and metasurfaces. Here, we propose a computational study on the transverse localization of BSWs by means of quasi-flat Fabry–Perot microcavities, which have the advantage of being fully exposed toward the outer environment. These structures are constituted by defected periodic corrugations of a dielectric multilayer top surface. The dispersion and spatial distribution of BSWs’ cavity mode are presented. In addition, the hybridization of BSWs with an A exciton in a 2D flake of tungsten disulfide (WS2) is also addressed. We show evidence of strong coupling involving not only propagating BSWs but also localized BSWs, namely, band-edge and cavity modes.

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Section: Introductionmentioning

confidence: 99%

Bloch Surface Waves in Open Fabry–Perot Microcavities

et al. 2023

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“…This is usually achieved by patterning the terminating layer of the one-dimensional photonic crystal, frequently called the functional layer, such that for the operational frequency, the BSWs experience slightly different effective indices in the structured and unstructured functional layer, respectively [18]. This permits to achieve waveguides and resonators with lateral confinement [19,20], but also more complicated functional devices that can be realized upon exploitation of the generally small index contrast [21].…”

Section: Introductionmentioning

confidence: 99%

Inverse design of cavities for Bloch Surface Waves interfaced to integrated waveguides

Augenstein

Roussey

Grosjean

et al. 2022

Photonics and Nanostructures - Fundamentals and Applications

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“…Here, we demonstrate a photonic crystal nanobeam cavity (PhCNC) in a PhC ridge supporting BSWs [6], thus combining the small V and footprint size of a PhC cavity with the surface field enhancement typical of BSWs. We also track down the origin of the disappointing performance of PhC ridge waveguides in terms of propagation loss, and suggest a general design principle to reduce it.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Confinement of Visible Light in a Nanophotonic Resonator

Perani

Liscidini

2021

EPJ Web Conf.

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We report on the design of a novel nanoresonator operating at visible wavelengths, in which light confinement is achieved by a hybrid mechanism based on total internal reflection and photonic band gap. We show that this structure can support resonant nanophotonic modes with mode volumes on the order of one cubic wavelength, and Q factors exceeding several tens of thousands. Its properties make it ideal for controlling and enhancing the light-matter interaction at sub-wavelength scales.

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Bloch-surface-wave photonic crystal nanobeam cavity

Cited by 16 publications

References 22 publications

Bloch Surface Waves in Open Fabry–Perot Microcavities

Bloch Surface Waves in Open Fabry–Perot Microcavities

Inverse design of cavities for Bloch Surface Waves interfaced to integrated waveguides

Hybrid Confinement of Visible Light in a Nanophotonic Resonator

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