460 citations · 961 across the 19 of their papers we have counts for
20 papers
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…
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…
Post-2000 Nonlinear Optical Materials and Measurements: Data Tables and Best Practices
Nathalie Vermeulen, Daniel Espinosa, Adam Ball +19
In its 60 years of existence, the field of nonlinear optics has gained momentum especially over the past two decades thanks to major breakthroughs in material science and technolog…
On the Automated Detection of Corneal Edema with Second Harmonic Generation Microscopy and Deep Learning
Stefan R. Anton, Rosa M. Martínez-Ojeda, Radu Hristu +7
When the cornea becomes hydrated above its physiologic level it begins to significantly scatter light, loosing transparency and thus impairing eyesight. This condition, known as co…
Fourier-Engineered Plasmonic Lattice Resonances
Theng-Loo Lim, Yaswant Vaddi, M. Saad Bin-Alam +7
Resonances in optical systems are useful for many applications, such as frequency comb generation, optical filtering, and biosensing. However, many of these applications are diffic…
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…
Cross-polarized surface lattice resonances in a rectangular lattice plasmonic metasurface
M. Saad Bin-Alam, Orad Reshef, Raja Naeem Ahmad +4
Multiresonant metasurfaces could enable many applications in filtering, sensing and nonlinear optics. However, developing a metasurface with more than one high-quality-factor or hi…
Broadband frequency conversion of ultrashort pulses using high- metasurface cavities
Timo Stolt, Mikko J. Huttunen
Frequency conversion of light can be dramatically enhanced using high quality factor (-factor) cavities. Unfortunately, the achievable conversion efficiencies and conversion ban…
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…
Spectral Vector Beams for High-Speed Spectroscopic Measurements
Lea Kopf, Juan R. Deop Ruano, Markus Hiekkamäki +4
Structured light harnessing multiple degrees of freedom has become a powerful approach to use complex states of light in fundamental studies and applications. Here, we investigate…
Hyperpolarizability of plasmonic meta-atoms in metasurfaces
M. Saad Bin-Alam, Joshua Baxter, Kashif M. Awan +7
Plasmonic metasurfaces are promising as enablers of nanoscale nonlinear optics and flat nonlinear optical components. Nonlinear optical responses of such metasurfaces are determine…
Backward phase-matched second-harmonic generation from stacked metasurfaces
Timo Stolt, Jeonghyun Kim, Sébastien Héron +6
We demonstrate phase-matched second-harmonic generation (SHG) from three-dimensional metamaterials consisting of stacked metasurfaces. To achieve phase matching, we utilize a novel…
Transient perturbative nonlinear responses of plasmonic materials
Mikko J. Huttunen, Jussi Kelavuori, Marco Ornigotti
Recent investigations on optical nonlinearities of plasmonic materials suggest their responses may be even beyond the usual perturbative description. To better understand these sur…
Ultra-high-Q resonances in plasmonic metasurfaces
M. Saad Bin-Alam, Orad Reshef, Yaryna Mamchur +8
Plasmonic nanostructures hold promise for the realization of ultra-thin sub-wavelength devices, reducing power operating thresholds and enabling nonlinear optical functionality in…
Multi-resonant high-Q plasmonic metasurfaces
Orad Reshef, Md Saad-Bin-Alam, Mikko J. Huttunen +5
Resonant metasurfaces are devices composed of nanostructured sub-wavelength scatterers that generate narrow optical resonances, enabling applications in filtering, nonlinear optics…
Less is more - enhancement of second-harmonic generation from metasurfaces by reduced nanoparticle density
Robert Czaplicki, Antti Kiviniemi, Mikko J. Huttunen +7
We investigate optical second-harmonic generation (SHG) from metasurfaces where noncentrosymmetric V-shaped gold nanoparticles are ordered into regular array configurations. In con…
Demonstration of Optical Nonlinearity in InGaAsP/InP Passive Waveguides
Shayan Saeidi, Payman Rasekh, Kashif M. Awan +3
We report on the study of the third-order nonlinear optical interactions in InGaAsP/InP strip-loaded waveguides. The material composition and waveguide…
Using surface lattice resonances to engineer nonlinear optical processes in metal nanoparticle arrays
Mikko J. Huttunen, Payman Rasekh, Robert W. Boyd +1
Collective responses of localized surface plasmon resonances, known as surface lattice resonances (SLRs) in metal nanoparticle arrays, can lead to high quality factors (~100), larg…
Resonant second-harmonic-generation circular-dichroism microscopy reveals molecular chirality in native biological tissues
Mei-Yu Chen, Mikko J. Huttunen, Che-Wei Kan +5
Conventional linear optical activity effects are widely used for studying chiral materials. However, poor contrast and artifacts due to sample anisotropy limit the applicability of…
Measurement of optical second-harmonic generation from an individual single-walled carbon nanotube
M. J. Huttunen, O. Herranen, A. Johansson +9
We show that optical second-harmonic generation (SHG) can be observed from individual single-walled carbon nanotubes (SWCNTs) and, furthermore, allows imaging of individual tubes.…