148 citations · 153 across the 7 of their papers we have counts for
10 papers
Electro-Optic Modulation in Polycrystalline Barium Titanate Metasurfaces Enhanced by Poling
Eleni Prountzou, Helena C. Weigand, Virginia Falcone +2
Electrically tunable metasurfaces leveraging the strong Pockel's effect in barium titanate (BaTiO or BTO) are a promising platform for reconfigurable free-space optical devices…
Wavelength-selective nonlinear wavefront control in resonant thin-film lithium niobate metasurfaces
Madona Mekhael, Timo Stolt, Helena Weigand +4
Nonlinear metasurfaces offer compact control over frequency conversion and wavefront shaping. However, existing approaches, often based on geometric phase, lack wavelength selectiv…
Tunable polarization-entangled near-infrared photons from orthogonal GaAs nanowires
Elise Bailly-Rioufreyt, Zoya Polshchykova, Grégoire Saerens +10
Quantum entanglement is a fundamental resource for emerging quantum technologies, enabling secure communication and enhanced sensing. For decades, generating polarization entangled…
Efficient GHz electro-optical modulation with a nonlocal lithium niobate metasurface in the linear and nonlinear regime
Agostino Di Francescantonio, Alessandra Sabatti, Helena Weigand +8
Electro-optical modulation is widely employed for optical signal processing and in laser technology. To date, it is efficiently realized in integrated photonic systems as well as i…
Scalable Lithium Niobate Nanoimprinting for Nonlinear Metalenses
Ülle-Linda Talts, Helena C. Weigand, Irene Occhiodori +1
Miniaturizing nonlinear optical components is essential for integrating advanced light manipulation into compact photonic devices, enabling scalable and cost-effective applications…
Polarization-entangled photon pair generation from an epsilon-near-zero metasurface
Wenhe Jia, Grégoire Saerens, Ülle-Linda Talts +5
Polarization-entangled photon pair sources are essential for diverse quantum technologies, such as quantum communication, computation, and imaging. However, the generation of compl…
Minireview on Disordered Optical Metasurfaces
P. Lalanne, A. Dmitriev, C. Rockstuhl +2
The use of coherent wave phenomena to enhance device performance is a cornerstone of modern optics. In juxtaposition to (locally) periodic metasurfaces, their disordered counterpar…
Large-Scale Bottom-Up Fabricated 3D Nonlinear Photonic Crystals
Viola Valentina Vogler-Neuling, Ülle-Linda Talts, Rebecca Ferraro +9
Nonlinear optical effects are used to generate coherent light at wavelengths difficult to reach with lasers. Materials periodically poled or nanostructured in the nonlinear suscept…
Sol-gel Barium Titanate Nanohole Array as a Nonlinear Metasurface and a Photonic Crystal
Ülle-Linda Talts, Helena C. Weigand, Grégoire Saerens +6
The quest of a nonlinear optical material that can be easily nanostructured over a large surface area is still ongoing. Here, we demonstrate a nanoimprinted nonlinear barium titana…
Enhanced electro-optic modulation in resonant metasurfaces of lithium niobate
Helena Weigand, Viola V. Vogler-Neuling, Marc Reig Escalé +5
In display technologies or data processing, planar and subwavelength free-space components suited for flat photonic devices are needed. Metasurfaces, which shape the optical wavefr…