Agnès Maître

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We consider the problem of the measurement of very small displacements in the transverse plane of an optical image with a split photodetector. We show that the standard quantum limit for such a measurement, which is equal to the diffraction limit divided by the square root of the number of photons used in the measurement, cannot be overcome by use of(More)
We experimentally demonstrate the control of the spontaneous emission rate and the radiation pattern of colloidal quantum dots deterministically positioned in a plasmonic patch antenna. The antenna consists of a thin gold microdisk separated from a planar gold layer by a few tens of nanometers thick dielectric layer. The emitters are shown to radiate(More)
We study the intensity spatial correlation function of optical speckle patterns above a disordered dielectric medium in the multiple scattering regime. The intensity distributions are recorded by scanning near-field optical microscopy (SNOM) with sub-wavelength spatial resolution at variable distances from the surface in a range which spans continuously(More)
Rodents are exquisitely sensitive to light and optogenetic behavioral experiments routinely introduce light-delivery materials into experimental situations, which raises the possibility that light could leak and influence behavioral performance. We examined whether rats respond to a faint diffusion of light, termed caplight, which emanated through the(More)
Molecularly imprinted polymers are efficient materials to detect selectively target molecules with a very high sensitivity. In this study, we associate them to 3D self-assembled photonic crystals and extend their use to the detection of nanoparticles. We focus on the realization of the imprint of nanoparticles, in our case fluorescent nanocrystals, and(More)
Optical Tamm plasmon states are electromagnetic modes confined at the interface between a Bragg mirror and a metallic film. These states offer coupling to photonic states in a relatively narrow solid angle in both TM and TE polarizations, and quality factors of a few hundreds to thousands in the visible and near infrared domain with limited fabrication(More)
We present a versatile and efficient way to engineer a planar defect layer between two opal-based photonic crystals, leading to the appearance of a passband within the photonic stopband. The optimization of the planar defect parameters, necessary to preserve the high crystallographic order of the hetero-structures, is deduced from 1D-simulations of(More)
In this paper, we describe the plasmonic and plasmon-photon coupling properties of nanostructured metallic films obtained by a self-assembly protocol. A gold layer is deposited on top of a self-assembled deposition of silica beads (artificial opal), which thus acts as a template. Atomic-force and scanning-electron microscopies demonstrates a periodic(More)
We investigated different methods to engineer efficiently a planar defect between two artificial opals. The samples were characterized by atomic force microscopy, scanning electron microscopy and specular reflection spectroscopy. They presented pronounced defect modes within the photonic stopband. These architectured structures were applied to the(More)