Publications by Debdatta Ray | EPFL Graph Search

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The material and exact shape of a nanostructure determine its optical response, which is especially strong for plasmonic metals. Unfortunately, only a few plasmonic metals are available, which limits the spectral range where these strong optical effects ca ...

Hybrid metal-dielectric nanostructures have recently gained prominence because they combine strong field enhancement of plasmonic metals and the several low-loss radiation channels of dielectric resonators, which are qualities pertaining to the best of bot ...

The most prevalent materials used in the field of plasmonics are Au and Ag. However, for the past few years, the plasmonic community has also been looking for alternative materials that have lower losses than Au and higher stability than Ag. This thesis is ...

We perform a systematic study showing the evolution of the multipoles along with the spectra for a hybrid metal-dielectric nanoantenna, a Si cylinder and an Ag disk stacked one on top of another, as its dimensions are varied one by one. We broaden our anal ...

We have fabricated homogeneous thin films of an alloy of Au and Ag, by annealing two consecutive deposited layers of Au and Ag. We have also successfully fabricated nanodisks and nanorods made of AuAg alloys by annealing the nanostructures at 300 degrees C ...

We have fabricated metasurfaces that combine silicon resonators with aluminium disks. While the latter produce strong near-field enhancement, the former support optical resonances that can be used to obtain well-controlled far-field signatures. ...

Debdatta Ray

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A Low-Temperature Annealing Method for Alloy Nanostructures and Metasurfaces: Unlocking a Novel Degree of Freedom

Hybrid Metal-Dielectric Metasurfaces for Refractive Index Sensing

Fabrication and applications of AuAg alloy metasurfaces and hybrid metal dielectric nanoantennas

Multipolar scattering analysis of hybrid metal-dielectric nanostructures

Extending the limits of conventional plasmonics with low temperature alloying of noble metals

Plasmonic nanostructures made of Au/Ag alloyed at low temperature: Unlocking an additional degree of freedom

Fabrication of alloyed plasmonic nanostructures

Hybrid Metallodielectric Metasurfaces for Sensing

Hologram generated by alloy metasurfaces

Expanding the realms of plasmonics with Au/Ag alloy nanostructures and metasurfaces

Extending limits of plasmonics with unconventional metasurfaces