Fig. 1: Diff-CUP system. | Nature Communications

Fig. 1: Diff-CUP system.

From: Ultrafast and hypersensitive phase imaging of propagating internodal current flows in myelinated axons and electromagnetic pulses in dielectrics

Fig. 1

a Schematic of the Diff-CUP system. Amp amplifier, BS beamsplitter, CCD charge-coupled device camera, DG delay generator, HWP half-wave plate, LN lithium niobate crystal, OB objective lens, PBS polarizing beamsplitter, PG pulse generator, SC streak camera, Sync synchronization. b Delivery of an EMP, \(E\left(t\right)\), to the LN crystal through a custom-designed microstrip transmission line. c Spatiotemporal electric field distribution of the signal propagating in the LN crystal simulated using a finite element model. Green curve represents the Gaussian-shaped pulse in a snapshot. \(W\), width of the LN crystal; \(v\), propagation speed of the signal; \({w}_{s}\), pulse width of the signal. d Spatiotemporal phase changes resulted from the propagating signal in the LN crystal operating in different modes (conventional CUP, uncoded or coded). Yellow lines indicate the pulse width, and green lines represent the temporal intensity in the middle of the FOV.

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