Dr, Shunsuke Murai, assistant professor at Kyoto University, will join the Surface Photonics group during 2019 for a research sabbatical. Dr. Murai’s scientific interest is on the relationship between optical properties and the structure of matter at a mesoscopic scale. We welcome Shunsuke to the group.
We investigate experimentally and numerically two-dimensional arrays of silver nanoparticles and show how the Q-factor of collective plasmonic resonances critically depends on the quality of the metal film, the detuning between diffraction orders and localized resonances and the absorption of adhesive layer used between the substrate and the metallic nanoparticles. These silver nanoparticle arrays can…
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Our proposal NanoLEDs: bringing nanophotonics into solid-state lighting, submitted together with AMOLF and Lumileds, has been granted in the High-Tech Systems and Materials call of NWO. In this project, we will quantitatively study the implementation of nanostructured surfaces designed to interact optimally with the emission of LEDs to boost blue light emission and white light…
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We demonstrate nonlinear emission from molecular layers strongly coupled to extended light fields in arrays of plasmonic nanoparticles in the presence of structural imperfections. In contrast to recent observations of exciton-polariton lasing and condensation in organic systems, photonic modes play a minor role at the emission frequency in our system, and this emission has an…
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In this manuscript, we show proof-of-concept measurements on a GaAs film that was excited though a total internal reflection geometry. With this technique, we can obtain the photo-excited carrier dynamics and the THz photo-conductivity with a spatial resolution well below the THz diffraction limit. The manuscript entitled “Time-resolved terahertz time-domain near-field microscopy” has been published…
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High-refractive-index (HRI) dielectric nanostructures, and in particular semiconductors, are attracting great attention in Optics and Photonics nowadays for their low dissipative losses, which hold promise of high-efficiency devices, and unique optical properties, exhibiting strong magnetic-like optical resonances and associated scattering directionality, which renders them as excellent nanoantennas. Thereby a wealth of new or enhanced fundamental…
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In collaboration with the group of Prof. A. Bol, we have investigated the broadband optical response of graphene grown by chemical vapor deposition by combining terahertz time-domain spectroscopy (THz-TDS) at 0.25–1.7 THz with Fourier Transform Infrared Spectroscopy (FTIR) at 11–210 THz. These results have been published in the Journal of Applied Physics (J. Appl. Phys.124,…
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Mohammad Ramezani, PhD student at Surface Photonics group, presented his works on Plasmon-Exciton-Polariton Lasing as an invited speaker in 9th International Conference on Spontaneous Coherence in Excitonic Systems (ICSCE9) in Montreal, Canada (July 2018). The content of his talk comprised of photoluminescence properties of Plasmon-Exciton-Polariton lasing and its ultrafast dynamics using transient absorption spectroscopy
On August 23rd we moved the optical tables from DIFFER to our new lab at the TU/e. In the coming weeks we will have the ultrafast spectroscopy and nanophotonics lab up and running.
We propose a new technology based on optical nanoantennas for reducing the etendue (divergence) of light sources. This technology could be applied for long range optical communication. You can find more details in our recently accepted manuscript in ACS Photonics “Plasmonic Nanoantenna Arrays as Efficient Etendue Reducers for Optical Detection” or read the News item…
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