306 citations · 806 across the 12 of their papers we have counts for
9 papers · 1 filter
Nonlinear Optical Microscopy of Semiconductor Metal-Nanocavities
Riya Varghese, Shambhavee Annurakshita, Yaraslau Tamashevich +13
We use second and third harmonic generation microscopy to investigate the nonlinear optical response of GaAs nanocavities embedded in a gold film and compare them to bare GaAs nano…
Phase-Matched Second-Harmonic Generation from Metasurfaces Inside Multipass Cells
Madona Mekhael, Timo Stolt, Anna Vesala +4
We demonstrate a simple and scalable approach to increase conversion efficiencies of nonlinear metasurfaces by incorporating them into multipass cells and by letting the pump beam…
Finite size mediated radiative coupling of lasing plasmonic bound state in continuum
Benjamin O. Asamoah, Marek Nečada, Wenzhe Liu +12
Radiative properties of lasing plasmonic bound state in continuum are analyzed. The topological charge of the lasing signal is analyzed in the far field as well as in the source pl…
Thermal Control of Plasmonic Surface Lattice Resonances
Jussi Kelavuori, Viatcheslav Vanyukov, Timo Stolt +4
Plasmonic metasurfaces exhibiting collective responses known as surface lattice resonances (SLRs) show potential for realizing tunable and flat photonic components for wavelength-s…
SSR-PR: Single-shot Super-Resolution Phase Retrieval based two prior calibration tests
Peter Kocsis, Igor Shevkunov, Vladimir Katkovnik +2
We propose a novel approach and algorithm based on two preliminary tests of the optical system elements to enhance the super-resolved complex-valued imaging. The approach is develo…
Multiply-resonant Second-harmonic Generation using Surface Lattice Resonances in Aluminum Metasurfaces
Timo Stolt, Anna Vesala, Heikki Rekola +3
Nonlinear metamaterials show potential for realizing flat nonlinear optical devices but generally lack in terms of achievable conversion efficiencies. Recent work has focused on en…
Topological charge engineering in lasing bound states in continuum
Sughra Mohamed, Jie Wang, Heikki Rekola +4
Recently, optical bound states in continuum in various passive photonic crystals have been identified and similar structures incorporated with optical gain have been reported to ex…
Lasing in Ferromagnetic Plasmonic Arrays
Sara Pourjamal, Tommi K. Hakala, Marek Nečada +6
We report on lasing at visible wavelengths in arrays of ferromagnetic Ni nanodisks overlaid with an organic gain medium. We demonstrate that by placing an organic gain material wit…
Spatial Coherence Properties of Organic Molecules Coupled to Plasmonic Surface Lattice Resonances in the Weak and Strong Coupling Regimes
L. Shi, T. K. Hakala, H. T. Rekola +3
We study spatial coherence properties of a system composed of periodic silver nanoparticle arrays covered with a fluorescent organic molecule (DiD) film. The evolution of spatial c…