Integrated and Steerable Vortex Lasers using Bound States in Continuum

Bahari, Babak; Vallini, Felipe; Lepetit, Thomas; Tellez-Limon, Ricardo; Park, J. H.; Kodigala, Ashok; Fainman, Yeshaiahu; Boubacar, Kante

doi:10.48550/arxiv.1707.00181

Cited by 16 publications

(16 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental characterization of the topology of BICs has also been demonstrated. [185][186][187][188][189][190][191][192][218][219][220][221] For example, BICs in gratings were experimentally presented with polarization vortex by Doeleman et al [235] They designed and manufactured a 1D Si 3 N 4 grating supporting a BIC and confirmed its existence with re-flection measurements. They measured the polarization state of reflection around the BIC with k-space polarimetry and the expected vortex of polarization was observed (bottom of Figure 6c).…”

Section: Bound States In the Continuum In Photonic Crystalsmentioning

confidence: 99%

Topological Photonic Crystals: Physics, Designs, and Applications

Tang

Shi

et al. 2022

Laser & Photonics Reviews

172

View full text Add to dashboard Cite

Recent research in topological photonics has not only proposed and realized novel topological phenomena such as one-way broadband propagation and robust transport of light, but also designed and fabricated photonic devices with high-performance indexes, which are immune to fabrication errors such as defects or disorders. Photonic crystals, which are periodic optical structures with the advantages of good light field confinement and multiple adjusting degrees of freedom, provide a powerful platform to control the flow of light. With the topology defined in the reciprocal space, photonic crystals have been widely used to reveal different topological phases of light and demonstrate topological photonic functionalities. This review presents the physics of topological photonic crystals with different dimensions, models, and topological phases. The design methods of topological photonic crystals are introduced. Furthermore, the applications of topological photonic crystals in passive and active photonics are reviewed. These studies pave the way for applying topological photonic crystals in practical photonic devices.

show abstract

Section: Bound States In the Continuum In Photonic Crystalsmentioning

confidence: 99%

Topological Photonic Crystals: Physics, Designs, and Applications

Tang

Shi

et al. 2022

Laser & Photonics Reviews

172

View full text Add to dashboard Cite

show abstract

“…Nowadays we witness a surge of interest to BICs in field of photonics, where BICs were observed in various set-ups with periodical dielectric permittivity [5][6][7][8][9][10] . In particular, the studies on BICs are motivated by applications to resonant light enhancement [11][12][13] and lasing 14,15 . Another remarkable property of BICs is the emergence of a collapsing Fano feature in its parametric vicinity [16][17][18][19] , that can be potentially employed to narrow-band filters 20,21 .…”

Section: Introductionmentioning

confidence: 99%

Polarized bound state in the continuum and resonances with tunable Q-factor in an anisotropic photonic crystal

Timofeev,

Maksimov,

Sadreev

2017

Preprint

View full text Add to dashboard Cite

We consider a one-dimensional photonic crystal composed of alternating layers of isotropic and anisotropic dielectric materials. Such a system has different band structures for different polarizations of light. We demonstrate that if an anisotropic defect layer is inserted into the structure, the crystal can support an optical bound state in the continuum. By tilting the principle dielectric axes of the defect layer relative to those of the photonic crystal we observe a long-lived resonance in the transmission spectrum. We derive an analytical expression for the decay rate of the resonance that agrees well with the numerical data by the Berreman anisotropic transfer matrix approach. An experimental set-up with a liquid crystal defect layer is proposed to tune the Q-factor of the resonance through applying an external electric field. We speculate that the set-up provides a simple and robust platform for observing optical bound states in the continuum in the form of resonances with tunable Q-factor.

show abstract

“…These are photonic crystals-in some sense also a particular type of metasurface [23]-with subwavelength structures arranged to control the electromagnetic resonances of the crystal slab, effectively turning it into a high-quality-factor resonator without the need to form a physical cavity. BICs are intrinsically connected with topological charges allowing to generate OVs without any real-space chiral structure [24]. Since they are very sensitive to symmetry breaking they can be easily controlled by tuning the symmetry of the pump beam.…”

mentioning

confidence: 99%

Recent twists in twisted light: A perspective on optical vortices from dielectric metasurfaces

Piccardo,

Ambrosio

2020

Preprint

View full text Add to dashboard Cite

Optical vortices are the electromagnetic analogue of fluid vortices studied in hydrodynamics. In both cases the traveling wavefront, either made of light or fluid, is twisted like a corkscrew around its propagation axis-an analogy that inspired also the first proposition of the concept of optical vortex. Even though vortices are one of the most fundamental topological excitations in nature, they are rarely found in their electromagnetic form in natural systems, for the exception of energetic sources in astronomy, such as pulsars, quasars and black holes. Mostly optical vortices are artificially created in the laboratory by a rich variety of approaches. Here we provide our perspective on a technology that shook-up optics in the last decade-metasurfaces, planar nanostructured metamaterials-with a specific focus on its use for molding and controlling optical vortices.

show abstract

Integrated and Steerable Vortex Lasers using Bound States in Continuum

Cited by 16 publications

References 35 publications

Topological Photonic Crystals: Physics, Designs, and Applications

Topological Photonic Crystals: Physics, Designs, and Applications

Polarized bound state in the continuum and resonances with tunable Q-factor in an anisotropic photonic crystal

Recent twists in twisted light: A perspective on optical vortices from dielectric metasurfaces

Contact Info

Product

Resources

About