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1 20 × 24 pixel scan of a life-size mannequin at 324 m distance. fSample                         = 2 GHz, 7 × 106 pulses s−1, 16 ps histogram binning size, pattern length b = 16384 bits, 2 s per-pixel dwell time. Measurement acquired using a shallow-junction SPAD. (a) Close-up photograph of the scene. (b) Segmented surface plot of the scan, including several pixels locking onto background objects.
3 (a)–(d) x–z cross sections of the beam intensity are shown as a function of focal depth, zf, for a focused Gaussian beam propagating through in silico fractal medium 2. For each panel, the result for a single simulation is displayed on top, with the corresponding averaged result over N=100 randomly generated fractal media displayed on the bottom. For visualization, all images are self-normalized to a maximum value of 1.
4 (a)–(d) Color fringe image acquired by a color CCD camera and its RGB components, (e) image results from the division operation applied to image in (b) and (d). The background is clipped to enhance the detail of the fringes, (f) binary image obtained from (d).
5 Calculation result of prospective THz-wave intensity via BNA-DFG under the consideration of perfect phase matching and absorption effect.
6 Numerical simulations of amplification of white noise by FWM and SRS as a function of propagation length.
7 (a) Schematic of chalcogenide–silica all-solid bandgap fiber. Red: chalcogenide strands. (b) Scanning electron micrograph of endface of a chalcogenide–silica bandgap fiber (core diameter                                                                         7.6                                                       μm                                                               , pitch                                                                         3.8                                                       μm                                                               , hole diameter                                                                         1.45                                                       μm                                                               ) polished by focused-ion-beam milling.
8 Profile of a stable 																								l									=									+									1																					 vortex soliton with 																								b									=									4.4																					, 																																		p										i																		=									0.55																					. Isosurface depicting the field modulus						distribution (left) at 																								|									q									|									=									0.07																					.
9 GPU simulation results with the same parameters as in Fig. 4 of [9]. Thickness of the medium is 1 cm, refractive index n=1.33, wavelength of light is 633 nm. Radius, refractive index, and scattering coefficient of the spherical scatterer in the simulations in (a) and (b) are rs=0.1  μm, ns=1.59, μs=10  cm−1, and in the sphere–cylinder mixed simulations in (c) and (d), μs=5  cm−1. For the cylindrical scatterer in the simulations in (c) and (d), rc=0.75  μm, nc=1.56, μc(90°)=65  cm−1. The direction of the cylinders is along the y axis, and the standard deviation for the Gauss distribution of the direction is 5°. The birefringence value in the simulations in (b) and (d) is 1×10−5, corresponding to an extension of 5 mm. The birefringence axis is along the 45° direction on the x–y plane. The cutoff numbers of scattering steps are all set to 200. The number of simulated photons is 1.2×108 for each group. The detector area is 1  cm×1  cm, partitioned into 100×100 pixels.
10 Example of 2D array of color-coded dots.
11 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.
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.