Broadband frequency conversion of ultrashort pulses using high-Q metasurface resonators

Stolt, Timo; Huttunen, Mikko J.

doi:10.1088/1367-2630/ac4a14

Cited by 6 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since multimode resonant optical systems can exhibit complex temporal dynamics, studying their ultrafast optical response requires time-resolved methods. Examples of such systems include nanoparticle assemblies, − nonlocal diffractive metasurfaces, , anapoles, , as well as recently explored time-varying systems. − From the practical point of view, understanding and controlling the temporal dynamics can be crucial, e.g., for optimizing the efficiency of nonlinear optical processes and for tailoring their near- and far-field characteristics. − Periodic metasurfaces are especially relevant in that context, − as they can support collective resonances, in which Fano-like coupling between diffractive and localized resonances − can make the temporal dynamics nontrivial. Among various types of collective resonances, including guided-mode resonances, − surface lattice resonances (SLRs), − and waveguide-plasmon polaritons (WPPs), − of particular current interest are collective dark modes, − in which radiation loss is suppressed by destructive interference.…”

Section: Introductionmentioning

confidence: 99%

Temporal Dynamics of Collective Resonances in Periodic Metasurfaces

Kolkowski,

Berkhout,

Roscam Abbing

et al. 2024

ACS Photonics

View full text Add to dashboard Cite

Temporal dynamics of confined optical fields can provide valuable insights into light−matter interactions in complex optical systems, going beyond their frequency-domain description.Here, we present a new experimental approach based on interferometric autocorrelation (IAC) that reveals the dynamics of optical near-fields enhanced by collective resonances in periodic metasurfaces. We focus on probing the resonances known as waveguide-plasmon polaritons, which are supported by plasmonic nanoparticle arrays coupled to a slab waveguide. To probe the resonant near-field enhancement, our IAC measurements make use of enhanced two-photon excited luminescence (TPEL) from semiconductor quantum dots deposited on the nanoparticle arrays. Thanks to the incoherent character of TPEL, the measurements are only sensitive to the fundamental optical fields and therefore can reveal clear signatures of their coherent temporal dynamics. In particular, we show that the excitation of a high-Q collective resonance gives rise to interference fringes at time delays as large as 500 fs, much greater than the incident pulse duration (150 fs). Based on these signatures, the basic characteristics of the resonances can be determined, including their Q factors, which are found to exceed 200. Furthermore, the measurements also reveal temporal beating between two different resonances, providing information on their frequencies and their relative contribution to the field enhancement. Finally, we present an approach to enhance the visibility of the resonances hidden in the IAC curves by converting them into spectrograms, which greatly facilitates the analysis and interpretation of the results. Our findings open up new perspectives on time-resolved studies of collective resonances in metasurfaces and other multiresonant systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Temporal Dynamics of Collective Resonances in Periodic Metasurfaces

Kolkowski,

Berkhout,

Roscam Abbing

et al. 2024

ACS Photonics

View full text Add to dashboard Cite

show abstract

“…It can be evaluated by g ¼ P SF /P S , where P SF and P S are the optical powers of sum-frequency light and signal light. 24 The pump light is fixed at a single wavelength corresponding to one of the Fano peaks, and the signal light is scanned over a wavelength range near the other Fano peak. First, the pump light is fixed at 1418 nm, and the signal light is scanned over 1255-1258 nm wavelength range.…”

mentioning

confidence: 99%

Tunable and narrowband shortwave infrared light sensing enabled by dual-Fano resonance enhanced sum-frequency generation

Hu,

Li,

et al. 2024

Applied Physics Letters

View full text Add to dashboard Cite

Tunable and narrowband light detection provides a means of selectively detecting optical signals at a specific wavelength, enabling a precise tool for object identification, machine vision, spectroscopy, and so on. Simultaneous tunable and narrowband response in shortwave infrared (SWIR) detectors is critical yet still challenging. This work utilizes dual-Fano resonance enhanced sum-frequency generation in a two-layer structure comprising a silicon metasurface and a two-dimensional (2D) nonlinear GaSe layer to realize tunable and narrowband light detection in the SWIR range. The silicon metasurface affords a high-quality-factor dual-Fano resonance in the SWIR regime, which enhances the near-field optical density of the two resonant wavelengths (pump and signal) when passing through the 2D nonlinear layer, leading to drastically enhanced sum-frequency generation. The sum-frequency light at a visible wavelength that contains the information of the SWIR signal light, can then be detected by a low-noise visible detector. The tunability and selectivity in the response spectrum stem from the geometry-dependent dual-Fano resonance in the silicon metasurface, covering the 1200–1550 nm range. The upconversion detector exhibits a sub-nanometer narrowband detection with a full width at half maximum of down to ∼0.1 nm, owing to the high quality factor of the Fano resonances. This SWIR narrowband detection is one of the best performances reported so far, much narrower than commercial filter products. The peak value of the specific detectivity of 1.5 × 1012 Jones at 1256.3 nm is achieved, comparable to broadband commercial InGaAs detectors. The detector designs in this work open up the opportunity of upconversion sensors for delicate spectroscopic applications.

show abstract

Long-wave infrared to short-wave infrared upconversion through sum-frequency generation in a silicon symmetric metasurface integrated with two-dimensional material

Li²,

Wang³

et al. 2023

Applied Surface Science

View full text Add to dashboard Cite

Broadband frequency conversion of ultrashort pulses using high-Q metasurface resonators

Cited by 6 publications

References 36 publications

Temporal Dynamics of Collective Resonances in Periodic Metasurfaces

Temporal Dynamics of Collective Resonances in Periodic Metasurfaces

Tunable and narrowband shortwave infrared light sensing enabled by dual-Fano resonance enhanced sum-frequency generation

Long-wave infrared to short-wave infrared upconversion through sum-frequency generation in a silicon symmetric metasurface integrated with two-dimensional material

Contact Info

Product

Resources

About