Nanostructures/Nano-optics

Head: Prof. F.Kulzer & Dr.J.Houel

Permanent members : Dr. J.Margueritat, Prof. C.Dujardin

PhD student:

Nanoparticles are at the heart of numerous everyday applications, transcending the main scientific disciplines: Chemistry, Biology and Physics. One way to understand the fundamental Physics and Chemical-physics ruling the nanoworld and imagine its future applications is to study optical properties of luminescent nano-objects. From doped insulators to semiconductor quantum dots, the luminescence team studies the effects on their emission properties of modifications of their environment, such as electric field, temperature, refractive index or chemical structure. Another way is to investigate the mechanical properties of the nano-objects. From gold nanodimers to semiconductor nanoplatelets, the team studies the effect of nanoparticle shape, crystallinity, composition and surface chemistry, as well as the mechanical and opto-mechanical coupling between nano-objects.Our research applications range from different types of nano-probes to new detectors. To pursue our goals, we have developed several highly customized, state-of-the-art nano-optics experiments:

• Hybrid confocal/AFM microscope

• Ultra-stable cryogenic confocal microscope

• Near-infrared to telecom wavelengths confocal microscope

• Wide-field microscope coupled to the world fastest single photon ebCMOS camera

• Achromatic confocal microscope with deep-UV capabilities

• Single nano-object inelastic light scattering spectroscopies: Brillouin, Low-frequency Raman, and Raman

All our microscopes feature specific fast single photon counting and spectroscopic

equipment.

Illustrative recent publications:

Single photon source
Nanotechnology (2022)

Optical properties of individual CdS/CdSe/CdS nanocrystals: spherical quantum wells as single-photon sources

Aymeric Allemand, Florian Kulzer, Benoit Mahler, Christophe Dujardin, Julien Houel

Hybrid perovskites
Nanoscale (2022)

Doping MAPbBr 3 hybrid perovskites with CdSe/CdZnS quantum dots: from emissive thin films to hybrid single-photon sources

Justine Baronnier, Julien Houel, Christophe Dujardin, Florian Kulzer, Benoît Mahler

Inorganic CdSe/CdZnS NC
JPCC (2021)

Optical properties of fully inorganic core/gradient-shell CdSe/CdZnS nanocrystals at the ensemble and single-nanocrystal levels

Justine Baronnier, Benoit Mahler, Olivier Boisron, Christophe Dujardin, Florian Kulzer, Julien Houel

CdSe.CdS in SiO2
Semicond. Sci. and Tech.(2020)

Single CdSe/CdS colloidal nanocrystals embedded in an Ultra-Pure SiO2 matrix deposited by ion beam sputtering

Antoine Aubret, V Dolique, Agnès Piednoir, Christophe Dujardin, Florian Kulzer, Julien Houel

Vibration of Gold Nanodimers
JPCC (2019)

Inelastic Light Scattering by Multiple Vibrational Modes in Individual Gold Nanodimers

A.Girard, J.Lermé, H.Gehan, A.Mermet, C.Bonnet, E.Cottancin, A.Crut and J.Margueritat

A review on local field effects
ChemPhysChem (2018)

Understanding Local-Field Correction Factors in the Framework of the Onsager-Böttcher Model

A. Aubret, M.Orrit and F. Kulzer

Encapsulation of Q-dots
ACS Appli. Mater. Interfaces (2016)

Nondestructive Encapsulation of CdSe/CdS Quantum Dots in an Inorganic Matrix by Pulsed Laser Deposition

A. Aubret, J. Houel, A. Pereira, J. Baronnier, E. Lhuillier, B. Dubertret, C. Dujardin, F. Kulzer and A. Pillonnet

Q-dots as sensors of the index of refraction
Nanoscale (2016)

CdSe/ZnS quantum dots as sensors for the local refractive index

A. Aubret, A. Pillonnet, J. Houel, C. Dujardin and F. Kulzer

A new blinking analysis
ACS Nano (2015)

Autocorrelation Analysis for the Unbiased Determination of Power-Law Exponents in Single-Quantum-Dot Blinking

J. Houel, Q-T. Doan, T. Cajgfinger, G. Ledoux, D. Amans, A. Aubret, A. Dominjon, S. Ferriol, R. Barbier, M. Nasilowski, E. Lhuillier, B. Dubertret, C. Dujardin and F. Kulzer