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LALANNE Philippe


2016 groupe bandeau

2013 Lalanne portrait

Philippe Lalanne, email : ;

Philippe Lalanne is Directeur de Recherche at CNRS and is an international expert in nanoscale electrodynamics. He was first involved in Optical Information Processing in the group of Pierre Chavel at l'Institut d’Optique. In 1995, he spent a sabbatical year in the group of G.M. Morris, at the Institute of Optics in Rochester.

With his colleagues, he has launched new and powerful tools and models in computational electrodynamics [JOSAA 13 (1996), JOSAA 18 (2001), JOSAA 22 (2005), PRL 110 (2013)], has provided deep insight into the physical mechanisms involved in key nanoscale optical phenomena and devices, e.g. light confinement in photonic-crystal cavities [APL 78 (2001), Nature 429 (2004)] and the extraordinary optical transmission through metallic hole arrays [Nature 452 (2008), Nature 492 (2012)], and has designed and demonstrated novel nanostructures with record or completely novel performance in their time, e.g. diffractive optical elements [Opt. Lett. 23 (1998), JOSAA 16 (1999)], slow light injectors [Opt. Lett. 32 (2007)], directional plasmon launchers [NanoLett 11 (2011)], non-classical light source devices [PRL 105 (2010), Nat Photon. (2010)].

He has co-authored about 170 publications in peer-reviewed journals and filled 10 patents. He is a recipient of the Bronze medal of CNRS, the prix Fabry de Gramont of the Société Française d’Optique. He is a member of the editorial board of Advanced Optical Materials and Laser & Photonics Reviews, a board member of the OSA international council, Faculty advisor of the Bordeaux SPIE and OSA Student Chapters and is deputy-director of GDR ondes. He is a fellow of the IOP, OSA and SPIE and was Carl Zeiss visiting Professor at Jena in 2010

He was the supervisor of 15 PhD candidates, has co-supervised 5 PhD candidates. He is currently working on computational electrodynamics, slow light, quantum plasmonics, and complex optical systems.


RETOP: an open Matlab source for near-to-far-field transformation for free and guided waves in optical stacks (with COMSOL MODELs)

RETOP implements near-to-far-field transform (NFFT) for light scattering or emission problems in stratified media. RETOP can be used to retrieve the free-space and/or guided-mode radiation diagrams. The NFFT relies on the knowledge of the near-zone field (obtained from any full-wave Maxwell’s solver, not provided) on a rectangular box that should fully surround the local inhomogeneity. It is especially relevant for calculating the scattering of nanoparticle on substrates. Special attention is made to the interface with COMSOL Multiphysics.

NtoFField package V5 (ZIP / 5,12 MB)
QNM: an open Matlab source code for computing the resonance-mode of nanoresonators (with COMSOL MODELS)

QNM calculates and normalizes (mode volume) the resonance mode (also known as the quasi-normal modes or QNMs) of plasmonic or photonic nano/micro resonators. It relies on pedagocical Matlab programs that operates under Matlab-COMSOL livelink. A toolbox also calculates the absorption/extincsion cross-sections and the calculated normalized QNMs can be directly used to calculate LDOS (or Purcell factors).

QNM calculation V3 (ZIP / 2,83 MB)
RETICOLO: Rigorous Coupled Wave Analysis for gratings (Matlab)

RETICOLO implements the rigorous coupled wave analysis (RCWA) for 1D (classical and conical diffraction) and 2D crossed gratings. It operates under a MATLAB environment and incorporates an efficient and accurate toolbox for visualizing the electromagnetic field in the grating.



We offer postdoc, PhD, master positions in three areas:

2016 available positions (PDF / 222,15 kB)

We are currently looking for a motivated PhD student to work on the "Exotic optical properties of complex plasmonic nanostructures". See description here:

2017_PhD_LP2N_modeling_EN (PDF / 2,61 MB)

We also have an open position for a M2 internship on the "experimental characterization of light scattering by metasurfaces". See description here:


Master 1: optical waveguides
  1. Chapter 1: Macroscopic Maxwell’s equations
  2. Chapter 2: Introduction to optical waveguide modes
  3. Chapter 3: Classical waveguide geometries
  4. Chapter 4: Theory of optical waveguides
  5. Chapter 5: Pulse propagation in waveguides

Master 2: Optical artificial materials
  1. Chapter 1 Introduction (slides)
  2. Chapter 2 Bloch modes (note written in English)
  3. Chapter 3 Homosgeneisation subwavelength gratings (note in French)
  4. Chapter 4 artificial dielectrics (note in French)
  5. Chapter 5 Metamaterials (note in English)
  6. Chapter 6 Plasmonics


  1. Metalenses: an historical perspective on the report published in Science 352, June 2016, by the Harvard group, "Metalenses at visible wavelengths: diffraction-limited focusing and subwavelength resolution imaging"
    2016 metalenses - what is new (PDF / 2,29 MB)
  2. Understanding nanophotonics devices with modes
  3. From the RCWA to the aperiodic Fourier Modal Method (a-FMM)
  4. Plasmonics: from the extraordinary transmission to the plasmon death (hot electrons), passing by nanoparticle resonances