We report on the realization of functional infrared light concentrators based on a thick layer of air-polymer metamaterial with controlled pore size gradients. The design features an optimum gradient index profile leading to light focusing in the Fresnel zone of the structures for two selected operating wavelength domains near 5.6 and 10.4 μm. The metamaterial which consists in a thick polymer containing air holes with diameters ranging from λ/20 to λ/8 is made using a 3D lithography technique based on the two-photon polymerization of a homemade photopolymer. Infrared imaging of the structures reveals a tight focusing for both structures with a maximum local intensity increase by a factor of 2.5 for a concentrator volume of 1.5 λ3, slightly limited by the residual absorption of the selected polymer. Such porous and flat metamaterial structures offer interesting perspectives to increase infrared detector performance at the pixel level for imaging or sensing applications.

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Wavelength-scale light concentrator made by direct 3D laser writing of polymer metamaterials

3D Photoluminescent Nanostructures Containing Quantum Dots Fabricated by Two-Photon Polymerization: Influence of Quantum Dots on the Spatial Resolution of Laser Writing

In this article, we demonstrate the feasibility of self-positioning nanoemitters onto optical waveguides by visible-light nanoscale photopolymerization. A light-sensitive material containing nanoem...

Integration of Nanoemitters onto Photonic Structures by Guided Evanescent-Wave Nano-Photopolymerization

In numerous applications of optical scanning microscopy, a reference tapered fiber lens with high symmetry at sub-wavelength scale remains a challenge. Here, we demonstrate the ability to manufacture it with a wide range of geometry control, either for the length from several hundred nanometers to several hundred microns, or for the curvature radius from several tens of nanometers to several microns on the endface of a single mode fiber. On this basis, a scanning optical microscope has been developed, which allows for fast characterization of various sub-wavelength tapered fiber lenses. Focal position and depth of microlenses with different geometries have been determined to be ranged from several hundreds of nanometers to several microns. FDTD calculations are consistent with experimental results.

Rapid fabrication of micro-nanometric tapered fiber lens and characterization by a novel scanning optical microscope with submicron resolution.

A device for interferometric imaging may comprise multiple optical elements arranged in a linear configuration. The device may also comprise multiple waveguide arrays (WGAs) each WGA of the multiple WGAs may include one or more WGs. Some of the WGs of each WGA of the multiple WGAs may be optically coupled to an optical element of the multiple optical elements. Each WG of a first WGA of the multiple WGAs is coupled to a first optical element of the multiple optical elements and is paired with a WG of a second WGA of the multiple WGAs that is coupled to second optical element of the multiple optical elements. The lengths of the paired WGs of the first and second WGAs of the multiple WGAs are not equal.

Segmented planar imaging detector for electro-optic reconnaissance

We present a novel route to directly integrate an array of microlenses at the extremity of an optical fiber bundle The method is based on photopolymerization at the end of the fiber The method is based on the control of exposure dose and volume of the deposited droplet of photopolymerizable formulation Optical properties of the integrated microlenses are discussed on the basis of FDTD calculations

Pascale Royer

Papers

Integration of polymer microlens array at fiber bundle extremity by photopolymerization.