Self-Isolated Raman Lasing with a Chiral Dielectric Metasurface

Dixon, Jefferson; Lawrence, Mark; Barton, David R.; Dionne, Jennifer A.

doi:10.1103/physrevlett.126.123201

Cited by 53 publications

(33 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These knobs are tunable independently of each other to first order in perturbation theory, and hence q-BICs are an intrinsically highly multifunctional phenomena (as an example, up to eight scattering parameters may be controlled simultaneously). Finally, by stacking perturbations vertically, breaking out-of-plane symmetries to yield a generally chiral response, [125][126][127] ref. [62] extended the selection rules to the entire Poincaré sphere within a rational design scheme.…”

Section: Perturbative 0th Order Gratingsmentioning

confidence: 99%

Diffractive Nonlocal Metasurfaces

Overvig

Alù

2022

Laser & Photonics Reviews

View full text Add to dashboard Cite

Metasurfaces are ushering in an era of multifunctional control over optical wavefronts realized with ultrathin planarized devices. Recent advances have been enabling unprecedented control over the frequency response of these surfaces, suggesting that the future of flat optics may tailor both spectral and spatial degrees of freedom in highly multispectral and multifunctional devices. Diffractive nonlocal metasurfaces are opening new opportunities in this direction: they leverage symmetry-protected scattering from quasi-bound states in the continuum and, by spatially manipulating controlled geometric perturbations, they support ultrasharp optical responses with wavefront-manipulating features. Encoded in nonlocal (i.e., spatially extended) resonant modes, the resulting response is observed exclusively within the bandwidth of the resulting Fano resonance, affording ideal features for a wide range of applications. In this perspective, this novel class of metasurfaces are discussed in the broader context of flat optics, highlighting their peculiar operation in contrast to relevant predecessors, and highlighting the opportunities for future advancement and applications. In particular, it is emphasized that nonlocality and selectivity are inherently related, but that spectral and spatial selectivity can be independently tuned in suitably tailored metasurfaces. In turn, this freedom allows the design and implementation of both wavefront-shaping and wavefront-selective devices. The novel optical responses, combined with the compatibility with rational design, herald new prospects for active, nonlinear and quantum metasurfaces, ultrathin devices for augmented reality, and compact tailored optical sources.

show abstract

Section: Perturbative 0th Order Gratingsmentioning

confidence: 99%

Diffractive Nonlocal Metasurfaces

Overvig

Alù

2022

Laser & Photonics Reviews

View full text Add to dashboard Cite

show abstract

“…Quasi-BICs (q-BICs) with high-Q resonances are tailored perturbing the symmetry to couple out the resonant mode to free-space radiation [39][40][41][42][43][44][45][46][47][48][49] . Recently, chiroptical nanostructures mediated by BICs have been proposed, demonstrating perfect unitary chirality and extremely high Q-factors 50,51 , and greatly expanding the available platforms to achieve optical chirality [51][52][53][54][55][56] .…”

Section: Introductionmentioning

confidence: 99%

Planar chiral metasurfaces with maximal and tunable chiroptical response driven by bound states in the continuum

Shi¹,

Deng²,

GENG³

et al. 2022

Preprint

View full text Add to dashboard Cite

Optical metasurfaces with high-Q chiral resonances can boost light-matter interaction for various applications of chiral response for ultrathin, active, and nonlinear metadevices. Usually, such metasurfaces require sophisticated depth-resolved nanofabrication to realize subwavelength stereo-nanostructures, posing overwhelming challenges, especially in the short-wavelength range. Here, we suggest a novel planarized design of chiral metasurfaces supporting bound states in the continuum (BICs), and demonstrate experimentally chiroptical responses with record-high Q-factors (Q=390) and near-perfect circular dichroism (CD=0.93) at optical frequencies. The symmetry-reduced meta-atoms are highly birefringent and support winding elliptical eigen-polarizations with opposite helicity surrounding the BIC polarization singularity, providing a convenient way for achieving maximal planar chirality tuned by either broken in-plane symmetry or changing illumination direction. Such sharply resonant chirality realized in planar metasurfaces promises various practical applications in classical and quantum optics including chiral sensing, enantiomer selection, and chiral quantum emitters.

show abstract

“…A strong bianisotropic response can be achieved by breaking the inversion symmetry [38,39]. Up to now, bianisotropic metasurfaces have demonstrated asymmetric linear functionalities such as asymmetric reflection [40,41], asymmetric optical forces [38], self-isolated Raman lasing [42], light trapping [43], asymmetric absorption [44][45][46], and nonreciprocity [47,48], among other feats [36,37]. However, the nonlinear potentials of bianisotropic metasurfaces based on bound states in the continuum have remained unexplored.…”

Section: Introductionmentioning

confidence: 99%

Giant asymmetric second-harmonic generation in bianisotropic metasurfaces based on bound states in the continuum

Mobini¹,

Alaee²,

Boyd³

et al. 2021

Preprint

View full text Add to dashboard Cite

Bianisotropy is a powerful concept enabling asymmetric optical response, including asymmetric reflection, absorption, optical forces, light trapping, and lasing. The physical origin of these asymmetric effects can be understood from magnetoelectric coupling and asymmetrical field enhancement. Here, we theoretically propose highly asymmetric second-harmonic generation (SHG) in bianisotropic AlGaAs metasurfaces. We show that around four orders of magnitude secondharmonic power difference for the forward and backward illuminations can be obtained by altering geometrical parameters that coincide with quasi-bound states in the continuum. Our study paves the way towards directional generation of higher-order waves and can be potentially useful for nonlinear holograms.

show abstract

Self-Isolated Raman Lasing with a Chiral Dielectric Metasurface

Cited by 53 publications

References 46 publications

Diffractive Nonlocal Metasurfaces

Diffractive Nonlocal Metasurfaces

Planar chiral metasurfaces with maximal and tunable chiroptical response driven by bound states in the continuum

Giant asymmetric second-harmonic generation in bianisotropic metasurfaces based on bound states in the continuum

Contact Info

Product

Resources

About