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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 Transfer of angular momentum in optical tweezers. A trapped object can be rotated either by the transfer of SAM from a circularly polarized beam (left) or by the transfer of OAM from a high-order Laguerre–Gaussian beam.
3 Effect of EOT on spatial information. The central figure shows the input probe beam generated with the DLP before the FWM. The top row shows the entangled images generated by the FWM process before the plasmonic structures, while the lower row shows the entangled images after transduction through the plasmonic structures.
4 Normalized linear Stokes vector components demonstrate polarization synthesis.
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 A helical phase profile                                                          exp                              		                                     (                                 i                                 ℓ                                 ϕ                                 )                                                                                  converts a Gaussian laser beam into a helical mode whose wave fronts resemble an ℓ-fold corkscrew. In this case                                                          ℓ                              =                              3                                                   .
7 Isointensity plot of an oblique spatiotemporal Bessel–Airy wave packet.
8 Decomposition of natural images into Fourier components. (a) All images can be expressed as a sum of 2D Fourier basis functions [e.g., (b)] by taking the sum over all values in (c) the basis-scaled image.
9 Photograph of two large-area 1780 lines/mm diffraction gratings (	      				  420		    		  mm		  ×		  450		    		  mm			      	    ) used at high incidence in a pulse compressor for the high-energy PETAL laser [79]. The diffraction gratings are made of dielectrics; see Section 6.1b.
10 Co-registered image of the change in blood flow image (Fig. 3A) with the projection view image of the blood vessel network obtained by the OMAG method after the injury (Fig. 4B). The color map is the same as in Fig. 3A. The grayscale of the OMAG image was inverted such that the blood vessels appear dark for better contrast.
11 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.
12 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.
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