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Christophe Marcel Georges Galland

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Publications associées (40)

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

Continuous-wave frequency upconversion with a molecular optomechanical nanocavity

Christophe Marcel Georges Galland, Tobias Kippenberg, Philippe Andreas Rölli, Sakthi Priya Amirtharaj, Wen Chen, Sachin Suresh Verlekar

Coherent upconversion of terahertz and mid-infrared signals into visible light opens new horizons for spectroscopy, imaging, and sensing but represents a challenge for conventional nonlinear optics. Here, we used a plasmonic nanocavity hosting a few hundre ...

American Association for the Advancement of Science2021

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

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

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

Intrinsic luminescence blinking from plasmonic nanojunctions

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

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

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

Molecular Platform for Frequency Upconversion at the Single-Photon Level

Christophe Marcel Georges Galland, Tobias Kippenberg, 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

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

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

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

Nonlinear characterization of a silicon integrated Bragg waveguide filter

Christophe Marcel Georges Galland

2018

Two-Color Pump-Probe Measurement of Photonic Quantum Correlations Mediated by a Single Phonon

Vincenzo Savona, Christophe Marcel Georges Galland, Kilian Robert Seibold, Hugo Pierre Alexandre Flayac, Mitchell David Anderson, Santiago Tarrago Velez

We propose and demonstrate a versatile technique to measure the lifetime of the one-phonon Fock state using two-color pump-probe Raman scattering and spectrally resolved, time-correlated photon counting. Following pulsed laser excitation, the n = 1 phonon ...

2018

Nanoparticle on mirror plasmonic nanostructure for molecular cavity optomechanics

Christophe Marcel Georges Galland, Nils Kipfer, Tianqi Zhu, Aqeel Ahmed, Santiago Tarrago Velez

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

Energy correlations of photon pairs generated by a silicon microring resonator probed by Stimulated Four Wave Mixing

Matteo Galli, Christophe Marcel Georges Galland, Davide Grassani

Compact silicon integrated devices, such as micro-ring resonators, have recently been demonstrated as efficient sources of quantum correlated photon pairs. The mass production of integrated devices demands the implementation of fast and reliable techniques ...

Nature Research2016

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

Molecular Optomechanics with Plasmons: Backaction at the nanoscale

Christophe Marcel Georges Galland, Tobias Kippenberg, Nicolas Piro Mastracchio

The plasmonic systems used in surface-enhanced Raman scattering are shown to be quivalent to optomechanical cavities. The new backaction force of the plasmon on the molecular vibration could lead to coherent amplification of vibrational motion. ...

OSA2015

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

Experimental demonstration of broadband Lorentz non-reciprocity in an integrable photonic architecture based on Mach-Zehnder modulators

Christophe Marcel Georges Galland, Yang Liu, Ran Ding, Qi Li

Lorentz reciprocity is a direct consequence of Maxwell equations governing the propagation of light in passive linear media with symmetric permittivity and permeability tensors. Here, we demonstrate the first active optical isolator and circulator implemen ...

Optical Soc Amer2014

On-Chip Heralded Single Photon Source with Demultiplexing and Pump Filtering

Christophe Marcel Georges Galland, Davide Grassani

We demonstrate an on-chip source of correlated photons with spatial demultiplex-ing of signal and idler photons via ring resonators and with pump suppression greater than 60 decibels. ...

OSA2014

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

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

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

Heralded Single-Phonon Preparation, Storage, and Readout in Cavity Optomechanics

Nicolas Gisin, Christophe Marcel Georges Galland, Tobias Kippenberg, Nicolas Piro Mastracchio

We show how to use the radiation pressure optomechanical coupling between a mechanical oscillator and an optical cavity field to generate in a heralded way a single quantum of mechanical motion (a Fock state). Starting with the oscillator close to its grou ...

American Physical Society2014

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