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1 Supplementary epifluorescence collection through a ring of optical fibers. (a) Top: CAD-drawing of a custom fiber-ring holder placed under an objective. Bottom: Closeup view showing the ring-like arrangement of the fiber tips. Only five of eight fibers are shown. Fluorophores are 2-photon excited in the focus of an infrared laser beam (red), causing isotropic fluorescence emission (green). (b) Left: Top view of the ring-like arrangement of eight 1-mm diameter fibers. Right: Dual-channel detection in a custom 2PLSM setup. Optical fibers were bundled and placed in front of a second PMT.
2 Example of color stripe indexing based on De Bruijn sequence                                                                                           (                                 k                                 =                                 5                                 ,                                 n                                 =                                 3                                 )                                                                                  [35].
3 Fundamental mode transverse electric field intensity (Et2) distributions at 1.45 μm (upper figures) and 1.75 μm (lower figures) wavelengths, for nearly zero-dispersion flattened PCFs with Λ=2.3  μm and d=0.61  μm for (a) α=0° and β=0°, (b) α=30° and β=0°, (c) α=0° and β=30°, (d) α=0° and β=0°, (e) α=30° and β=0°, and (f) α=0° and β=30°.
4 Sketch of a microroll that can be fabricated  by rolling up strained layers. The tube wall represents a three- dimensional metamaterial consisting of a metal–semiconductor  superlattice containing quantum wells and metal gratings.
5 Computer simulation of the light- intensity distribution of the interference pattern for hexagonal right-handed (RH) as well as left-handed (LH) photonic chiral structures using                                                                         6                           +                           1                                                                beam geometry. (a) 3D interference intensity distribution for RH structures. (c) Intensity profile in                                                                         x                           −                           z                                                                plane. (b) and (d) correspond to (a) and (c) for LH photonic chiral structures.
6 Plasmon energy ω in electron volts of a composite gold NT and gold core system, for q=0 and m=2, using ωp=1.37×1016  Hz, plotted versus δ and d, when a1=7  nm.
7 Source images used in the experiment. Upper, L-R: cosine, cosine2, curls. Lower, L-R: eye, nose, palm. Each image was presented at a size of two degrees of visual angle square.
8 Normalized net round-trip gain                                                                                                       G                                                               s                                 p                                                                                                                         as a function of pump-signal and idler-signal phase mismatches                                                                         δ                                                         ν                                                               p                                 s                                                                                    Ω                           L                                                                and                                                                         δ                                                         ν                                                               i                                 s                                                                                    Ω                           L                                                               , respectively, for                                                                         N                           =                                                                                                                              (                                                                           π                                       /                                       2                                                                        )                                                                                             2                                                                                          . GVD is neglected, so the AM and PM eigenmodes are decoupled. (a) Gain for AM eigenmodes, (b) gain for PM eigenmodes.
9 Liquid-crystal SLMs allow unprecedented control in the generation and detection of structured light fields. (a) Long exposure image of laser light diffracted from the pixelated device. (b) CCD camera image showing the various diffraction orders. Efficiencies are typically in the 60%–85% range.
10 Experimental results of the signal and reference speckled beams with triangular aperture and cross-correlations between them in the first, second, and third columns, respectively.
11
12 Isointensity plot of an oblique spatiotemporal Bessel–Airy wave packet.
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