Data.rar

Dataset for validating multiplexed wavefront sensing with a thin diffuser

Supplementary document for Multiplexed wavefront sensing with a thin diffuser - 6774961.pdf

Revised supplemental informatio

Supplementary document for Multiplexed wavefront sensing with a thin diffuser - 6856404.pdf

Supplemental documen

Topological transformations of speckles

Deterministic control of coherent random light is highly important for information transmission through complex media. However, only a few simple speckle transformations can be achieved through diffusers without prior characterization. As recently shown, spiral wavefront modulation of the impinging beam allows permuting intensity maxima and intrinsic $\pm 1$-charged optical vortices. Here, we study this cyclic-group algebra when combining spiral phase transforms of charge $n$, with $D_3$- and $D_4$-point-group symmetry star-like amplitude modulations. This combination allows statistical strengthening of permutations and controlling the period to be 3 and 4, respectively. Phase saddle-points are shown to complete the cycle. These results offer new tools to manipulate critical points in speckles

Codes_v2.rar

This supplementary Material includes: •The raw data corresponding to the multiplexed speckle maps for the two experiments shown in Figure 2 (3 multiplexed wavefronts) and Figure 3 (5 multiplexed wavefronts) of the article. •The Matlab codes used to reconstruct the various multiplexed wavefronts from these speck-le maps (MAIN1_Multiplex.m) which is the heart of this article. This code will allow readers to check the impact of each reconstruction parameter (e.g. number of iterations, macropix-el size…) •The raw data corresponding to each wavefront, acquired individually using a standard non-multiplexed method . •A Matlab code (MAIN2_Comparison.m) allowing a quantitative comparison of the wave-fronts reconstructed using our multiplexing method to wavefronts acquired individually. •A Matlab code (MAIN3_Multiplex_AO.m) is an modification of (MAIN1_Multiplex.m), in which the direct DIC (T=1) is used with big phase-pixel to reconstruct the wavefront. Parfor loop is used for processing each GS running in a parallelization mode

3955552.pdf

Supplementary informatio

Reconfigurable Temperature Control at the Microscale by Light Shaping

From physics to biology, temperature is often a critical factor. Most existing techniques (e.g., ovens, incubators, ...) only provide global temperature control and incur strong inertia. Thermoplasmonic heating is drawing increasing interest by giving access to fast, local, and contactless optical temperature control. However, tailoring temperature at the microscale is not straightforward since heat diffusion alters temperature patterns. In this article, we propose and demonstrate an accurate and reconfigurable microscale temperature shaping technique by precisely tailoring the illumination intensity that is sent on a homogeneous array of absorbing plasmonic nanoparticles. The method consists in (i) calculating a Heat Source Density (HSD) map, which precompensates heat diffusion, and (ii) using a wavefront engineering technique to shape the illumination and reproduce this HSD in the nanoparticle plane. After heat diffusion, the tailored heat source distribution produces the desired microscale temperature pattern under a microscope. The method is validated using wavefront-sensing-based temperature imaging microscopy. Fast (sub-s), accurate, and reconfigurable temperature patterns are demonstrated over arbitrarily shaped regions. In the context of cell biology, we finally propose a methodology combining fluorescence imaging with reconfigurable temperature shaping to thermally target a given population of cells or organelles of interest, opening new strategies to locally study their response to thermal activation

Media 1: Heterodyne holographic microscopy of gold particles

Originally published in Optics Letters on 01 March 2008 (ol-33-5-500

One-Shot Measurement of the Three-Dimensional Electromagnetic Field Scattered by a Subwavelength Aperture Tip Coupled to the Environment

Near-field scanning optical microscopy (NSOM) achieves subwavelength resolution by bringing a nanosized probe close to the surface of the sample. This extends the spectrum of spatial frequencies that can be detected with respect to a diffraction limited microscope. The interaction of the probe with the sample is expected to affect its radiation to the far field in a way that is often hard to predict. Here we address this question by proposing a general method based on full-field off-axis digital holography microscopy which enables to study in detail the far-field radiation from a NSOM probe as a function of its environment. A first application is demonstrated by performing a three-dimensional (3D) tomographic reconstruction of light scattered from the subwavelength aperture tip of a NSOM, in free space or coupled to transparent and plasmonic media. A single holographic image recorded in one shot in the far field contains information on both the amplitude and the phase of the scattered light. This is sufficient to reverse numerically the propagation of the electromagnetic field all the way to the aperture tip. Finite Difference Time Domain (FDTD) simulations are performed to compare the experimental results with a superposition of magnetic and electric dipole radiation

Supplementary document for 3D nanoparticle superlocalization with a thin diffuser - 5838426.pdf

Supplementary informatio