Hyperpolarizability of Plasmonic Meta-Atoms in Metasurfaces

Bin-Alam, M. Saad; Baxter, Joshua; Awan, Kashif M.; Kiviniemi, Antti; Mamchur, Yaryna; Lesina, Antonino Calà; Tsakmakidis, Kosmas L.; Huttunen, Mikko J.; Ramunno, Lora; Dolgaleva, Ksenia

doi:10.1021/acs.nanolett.0c02991

Cited by 15 publications

(7 citation statements)

References 64 publications

(111 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[37]. After some numerical experiments using our existing hydrodynamics solver 38 , we found that including hydrodynamic terms has very little effect on the nonlinearity when solved in conjunction with the TTM.…”

Section: Model For Tco Nonlinear Optical Responsementioning

confidence: 99%

Understanding the nonlinear optical response of epsilon near zero materials in the time-domain

Baxter¹,

Pérez-Casanova²,

Cortes-Herrera³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

The promise of active nanophotonics technology relies on the confinement and control of light at the nanoscale. Confinement via plasmonics, dielectric resonators, and waveguides can be complemented with materials whose optical properties can be controlled using nonlinear effects. Transparent conducting oxides (TCOs) exhibit strong optical nonlinearities in their near zero permittivity spectral region, on the femtosecond

show abstract

Section: Model For Tco Nonlinear Optical Responsementioning

confidence: 99%

Understanding the nonlinear optical response of epsilon near zero materials in the time-domain

Baxter¹,

Pérez-Casanova²,

Cortes-Herrera³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The highest Q -factor of these FLRs is 800 (FLR2, at a wavelength of 1550 nm), which is 2 orders of magnitude higher than those associated with the LSPRs of the individual nanoparticles and an order of magnitude higher than that of Fabry–Pérot SLR modes . With such high Q -factors and the strong optical nonlinearity of metals, the FLR metasurfaces could find applications in nonlinear processes, such as nondegenerate four-wave mixing (FWM)…”

Section: Resultsmentioning

confidence: 99%

Fourier-Engineered Plasmonic Lattice Resonances

et al. 2022

Self Cite

View full text Add to dashboard Cite

Resonances in optical systems are useful for many applications, such as frequency comb generation, optical filtering, and biosensing. However, many of these applications are difficult to implement in optical metasurfaces because traditional approaches for designing multiresonant nanostructures require significant computational and fabrication efforts. To address this challenge, we introduce the concept of Fourier lattice resonances (FLRs) in which multiple desired resonances can be chosen a priori and used to dictate the metasurface design. Because each resonance is supported by a distinct surface lattice mode, each can have a high quality factor. Here, we experimentally demonstrate several metasurfaces with flexibly placed resonances (e.g., at 1310 and 1550 nm) and Q-factors as high as 800 in a plasmonic platform. This flexible procedure requires only the computation of a single Fourier transform for its design, and is based on standard lithographic fabrication methods, allowing one to design and fabricate a metasurface to fit any specific, optical-cavity-based application. This work represents a step toward the complete control over the transmission spectrum of a metasurface.

show abstract

“…These extra terms would broaden the functionality of our model by taking into account even‐ordered nonlinearities such as second‐harmonic generation. After some numerical experiments using our existing hydrodynamics solver, [ 44 ] we found that including hydrodynamic terms has very little effect on the permittivity change when solved in conjunction with the TTM. In fact the hydrodynamic terms are nonlocal, adding an unnecessary computational load, [ 45 ] and thus we chose to ignore these terms for the present work.…”

Section: Model For Tco Time‐varying Nonlinear Optical Responsementioning

confidence: 99%

Dynamic Nanophotonics in Epsilon‐Near‐Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational Model

Baxter

Pérez-Casanova

Cortes-Herrera

et al. 2023

Advanced Photonics Research

Self Cite

View full text Add to dashboard Cite

The promise of dynamic nanophotonic technologies relies on the confinement and spatiotemporal control of light at the nanoscale. Confinement via plasmonics, dielectric resonators, and waveguides can be complemented with materials whose optical properties can be controlled using nonlinear effects. Transparent conducting oxides (TCOs) exhibit strong optical nonlinearities in their near‐zero permittivity spectral region, on the femtosecond timescale. Harnessing full spatiotemporal control over the nonlinear response requires a deeper understanding of the process. To achieve this, a self‐consistent multiphysics time‐domain model for the nonlinear optical response of TCOs is developed and implemented into a 3D finite‐difference time‐domain code. Simulations are compared and tuned against recently published experimental results for intense laser irradiation of thin indium tin oxide (ITO) films, achieving good quantitative agreement; the time‐domain dynamics of the nonlinear response and the phenomenon of time‐refraction are also explored. Finally, by simulating intense laser irradiation of a plasmonic particle on an ITO film, the applicability of the approach to time‐varying metasurfaces is demonstrated. As expected, significant enhancement of the nonlinear response of an ITO‐based metasurface over bare ITO thin films is found. This work thus enables quantitative nanophotonics design with conductive oxides in their epsilon‐near‐zero region.

show abstract

Hyperpolarizability of Plasmonic Meta-Atoms in Metasurfaces

Cited by 15 publications

References 64 publications

Understanding the nonlinear optical response of epsilon near zero materials in the time-domain

Understanding the nonlinear optical response of epsilon near zero materials in the time-domain

Fourier-Engineered Plasmonic Lattice Resonances

Dynamic Nanophotonics in Epsilon‐Near‐Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational Model

Contact Info

Product

Resources

About