Group Members

Dr. Johann Toudert
Dr. Jakub Cajzl
Dr. Ranjeet Dwivedi
Dr. Gour Mohan Das
Mamadou Faye
Amin Rastgordani

Dr. Johann Toudert 

Group Leader

Johann Toudert, PhD is specialized in the fields of advanced optical spectroscopy and theoretical analysis, advanced materials, plasmonics, nanophotonics and light management. He obtained his PhD degree in Physics, at the Université de Poitiers, France. After graduating, he carried out/led research at several institutes of the CSIC (Spain), the CNRS (France), the Université de Technologie de Troyes (France), and then at ICFO (Spain). He is the author/co-author of more than 70 research papers.

Dr. Jakub Cajzl

Postdoctoral Fellow

Jakub Cajzl, PhD is specialized in the field of crystal and glass photonics, both experimentally and theoretically. He owns a PhD from the University of Chemistry and Technology, Prague, and has worked at the Institute of Photonics and Electronics of the Czech Academy of Sciences - Department of Fiber Lasers and Nonlinear Optics, Prague, Czech Republic. His previous research work comprised the preparation and theoretical modeling of rare-earth - doped photonic crystal materials and optical fibers with the characterization of their luminescence properties in regard to the influence of the crystal field.

Dr. Ranjeet Dwivedi

Postdoctoral Fellow

Ranjeet Dwivedi, PhD received his PhD degree in Physics from IIT Delhi, India, in 2019. Afterwards, he has been a Postdoctoral Researcher at the University of Bordeaux, France. In December 2021, he joined the Optical Nanocharacterization group at ENSEMBLE3. His current research interests include electromagnetic metamaterials and plasmonic devices.

Dr. Gour Mohan Das

Postdoctoral Fellow

Gour Mohan Das, PhD obtained his PhD degree in Physics from the Indian Institute of Technology Patna. Then he worked as a postdoctoral researcher at CNR Napoli, Italy, where he was involved in research related to nanoplasmonics, Raman spectroscopy, and nanobiophotonics. He joined the Optical Nanocharacterization group at ENSEMBLE3 in March 2022. His recent research interests include nanoplasmonics, single-molecule plasmon-enhanced spectroscopy, computational nanophotonics, optical micro-resonators, metaphotonics, nanobiophotonics, and biosensing.

Mr. Mamadou Faye

PhD student

Mamadou Faye received his Master’s degree in Applied Physics and Physical Engineering: Photonics and Optics for Materials, at the Université de Lorraine, Metz, France. He is interested in materials physics (optics, photonics), materials characterization and modelling.

Mr. Amin Rastgordani

PhD student

Amin Rastgordani received his Master's degree in Electrical Engineering at Khajeh Nasir Toosi University of Technology, Tehran, Iran in 2019. He is interested in metamaterials, plasmonics, and photonics. He joined the Optical Nanocharacterization group at ENSEMBLE3 in April 2022. His current research includes the development of large-area high-performance switchable optical metamaterials.

TOPICS OF SPECIAL INTEREST

  • Optical metamaterials with active, multispectral or multifunctional properties.
  • Alternative materials for photonics (e.g., semi-metals, topological insulators, perovskites).
  • Plasmonic, polaritonic, epsilon-near-zero, high refractive index, cavity and hybrid properties.
  • Light management and shaping.

The Optical Nanocharacterization group aims at unveiling outstanding and useful optical properties down to the nanoscale in innovative crystal-based materials. This will contribute at demonstrating novel design concepts opening the path to materials and devices with unprecedented performance. We employ and develop state-of-the-art optical spectroscopy tools and numerical analysis methods to understand the physical origin of optical properties and propose new ideas.

The Optical Nanocharacterization group aims at unveiling outstanding and useful optical properties down to the nanoscale in innovative crystal-based materials. This will contribute at demonstrating novel design concepts opening the path to materials and devices with unprecedented performance. We employ and develop state-of-the-art optical spectroscopy tools and numerical analysis methods to understand the physical origin of optical properties and propose new ideas. Topics of special interest to the group are: (i) Optical metamaterials with active, multispectral or multifunctional properties; (ii) Alternative materials for photonics (e.g., semi-metals, topological insulators, perovskites); (iii) Plasmonic, polaritonic, epsilon-near- zero, high refractive index, cavity and hybrid properties; (iv) Light management and shaping.

Optical Nanochatacterization
Optical Nanochatacterization
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Ensemble3 sp. z o.o.

01-919  Warsaw
133 Wólczyńska St.

NIP 1182211096

KRS 0000858669 

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