Publications by Christophe Marcel Georges Galland

Related publications (39)

2022 Roadmap on integrated quantum photonics

Niels Quack, Christophe Marcel Georges Galland

Integrated photonics will play a key role in quantum systems as they grow from few-qubit prototypes to tens of thousands of qubits. The underlying optical quantum technologies can only be realized through the integration of these components onto quantum ph ...

IOP Publishing Ltd2022

Dual-Color Electroluminescence from Dot-in-Bulk Nanocrystals

Christophe Marcel Georges Galland

The emission color from colloidal semiconductor nanocrystals (NCs) is usually tuned through control of particle size, while multicolor emission is obtained by mixing NCs of different sizes within an emissive layer. Here, we demonstrate that recently introd ...

Amer Chemical Soc2014

Data and code associated with the paper 'How to use the dispersion in the χ(3) tensor for broadband generation of polarization-entangled photons'

Christophe Marcel Georges Galland, Valeria Vento, Sakthi Priya Amirtharaj, Francesco Ciccarello

Data and code associated with the following paper V. Vento, et al., Phys. Rev. Res. (2025) A thorough explanation of the experiment performed is available there. The name of each sub-folder and file in S-AS_chi3_code.zip indicates the corresponding figure ...

Zenodo2025

Molecular Vibration Explorer: an Online Database and Toolbox for Surface-Enhanced Frequency Conversion and Infrared and Raman Spectroscopy

Christophe Marcel Georges Galland

We present Molecular Vibration Explorer, a freely accessible online database and interactive tool for exploring vibrational spectra and tensorial lightvibration coupling strengths of a large collection of thiolated molecules. The "Gold" version of the data ...

AMER CHEMICAL SOC2022

Preparation and Decay of a Single Quantum of Vibration at Ambient Conditions

Christophe Marcel Georges Galland, Vivishek Sudhir, Mitchell David Anderson, Santiago Tarrago Velez, Kilian Robert Seibold

A single quantum of excitation of a mechanical oscillator is a textbook example of the principles of quantum physics. But mechanical oscillators, despite their pervasive presence in nature and modem technology, do not genetically exist in an excited Fock s ...

American Physical Society2019

Intrinsic luminescence blinking from plasmonic nanojunctions

Tobias Kippenberg, Christophe Marcel Georges Galland, Magalí Alejandra Lingenfelder, Giulia Tagliabue, Wen Chen, Sachin Suresh Verlekar, Karla Banjac, Philippe Andreas Rölli, Aqeel Ahmed

Plasmonic nanojunctions, consisting of adjacent metal structures with nanometre gaps, can support localised plasmon resonances that boost light matter interactions and concentrate electromagnetic fields at the nanoscale. In this regime, the optical respons ...

Nature Research2021

Mode-Specific Coupling of Nanoparticle-on-Mirror Cavities with Cylindrical Vector Beams

Christophe Marcel Georges Galland, Sachin Suresh Verlekar, Valeria Vento, Philippe Andreas Rölli

Nanocavities formed by ultrathin metallic gaps permitthe reproducibleengineering and enhancement of light-matter interaction, withmode volumes reaching the smallest values allowed by quantum mechanics.While the enhanced vacuum field in metallic nanogaps ha ...

2023

Molecular Platform for Frequency Upconversion at the Single-Photon Level

Tobias Kippenberg, Christophe Marcel Georges Galland, Philippe Andreas Rölli

Direct detection of single photons at wavelengths beyond 2 mu m under ambient conditions remains an outstanding technological challenge. One promising approach is frequency upconversion into the visible (VIS) or near-infrared (NIR) domain, where single-pho ...

American Physical Society2020

Micro- and nanofabrication techniques for single crystal diamond photonics

Christophe Marcel Georges Galland

Synthetically grown high-quality single crystal diamond is an excellent base material for quantum photonics. Planar single crystal diamond substrates several square millimeters in size are nowadays commercially available. They can be precisely structured u ...

Elsevier2025

Experimental QND measurements of complementarity on two-qubit states with IonQ and IBM Q quantum computers

Christophe Marcel Georges Galland, Valeria Vento, Nicolas Schwaller

We report the experimental nondemolition measurement of coherence, predictability and concurrence on a system of two qubits. The quantum circuits proposed by De Melo et al. (Phys Rev Lett 98(25):250501, 2007) are implemented on IBM Q (superconducting circu ...

SPRINGER2022

Electrochemical Control of Two-Color Emission from Colloidal Dot-in-Bulk Nanocrystals

Christophe Marcel Georges Galland

Colloidal "dot-in-bulk" nanocrystals (DiB NCs) consist of a quantum confined core embedded into a bulklike shell of a larger energy gap. The first reported example of this class of nanostructures are CdSe/CdS DiB NCs that are capable of producing tunable t ...

American Chemical Society2014

Nanoparticle on mirror plasmonic nanostructure for molecular cavity optomechanics

Christophe Marcel Georges Galland, Santiago Tarrago Velez, Aqeel Ahmed

The plasmonic response of gold can be utilized to enhance the incident electromagnetic (EM) field by several orders of magnitude. When a gold nanoparticle is placed in close proximity to a gold film, the incident field can excite a deeply confined plasmon, ...

IEEE2018

Integrated Source of Spectrally Filtered Correlated Photons for Large-Scale Quantum Photonic Systems

Matteo Galli, Christophe Marcel Georges Galland, Davide Grassani

We demonstrate the generation of quantum-correlated photon pairs combined with the spectral filtering of the pump field by more than 95 dB on a single silicon chip using electrically tunable ring resonators and passive Bragg reflectors. Moreover, we perfor ...

American Physical Society2014

Photon antibunching in single-molecule vibrational sum-frequency generation

Christophe Marcel Georges Galland, Francesco Ciccarello

Sum-frequency generation (SFG) enables the coherent upconversion of electromagnetic signals and plays a significant role in mid-infrared vibrational spectroscopy for molecular analysis. Recent research indicates that plasmonic nanocavities, which confine l ...

2025

Structural Order of the Molecular Adlayer Impacts the Stability of Nanoparticle-on-Mirror Plasmonic Cavities

Christophe Marcel Georges Galland, Magalí Alejandra Lingenfelder, Sachin Suresh Verlekar, Karla Banjac, Aqeel Ahmed, Fernando Pablo Cometto

Immense field enhancement and nanoscale confinement of light are possible within nanoparticle-on-mirror (NPoM) plasmonic resonators, which enable novel optically activated physical and chemical phenomena and render these nanocavities greatly sensitive to m ...

AMER CHEMICAL SOC2021

Assessment of the Bundle SNSPD Plus FPGA-Based TDC for High-Performance Time Measurements

Christophe Marcel Georges Galland, Santiago Tarrago Velez

Counting single photons and measuring their arrival time is of crucial importance for imaging and quantum applications that use single photons to outperform classical techniques. The investigation of the coincidence, i.e. correlation, between photons can b ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Bell correlations between light and vibration at ambient conditions

Christophe Marcel Georges Galland, Santiago Tarrago Velez

Time-resolved Raman spectroscopy techniques offer various ways to study the dynamics of molecular vibrations in liquids or gases and optical phonons in crystals. While these techniques give access to the coherence time of the vibrational modes, they are no ...

AMER ASSOC ADVANCEMENT SCIENCE2020

Proposal for an Optomechanical Bell Test

Christophe Marcel Georges Galland

Photons of a laser beam driving the upper motional sideband of an optomechanical cavity can decay into photon-phonon pairs by means of an optomechanical parametric process. The phononic state can subsequently be mapped to a photonic state by exciting the l ...

American Physical Society2016

Efficient, compact and low loss thermo-optic phase shifter in silicon

Christophe Marcel Georges Galland

We design a resistive heater optimized for efficient and low-loss optical phase modulation in a silicon-on-insulator (SOI) waveguide and characterize the fabricated devices. Modulation is achieved by flowing current perpendicular to a new ridge waveguide g ...

Optical Soc Amer2014

Nanocavities for Molecular Optomechanics: Their Fundamental Description and Applications

Christophe Marcel Georges Galland

Vibrational Raman scattering-a process where light exchanges energy with a molecular vibration through inelastic scattering-is most fundamentally described in a quantum framework where both light and vibration are quantized. When the Raman scatterer is emb ...

AMER CHEMICAL SOC2024