Fig. 1: Compressed ultrafast planar-polarization anisotropy imaging (CUP2AI). | Nature Communications

Fig. 1: Compressed ultrafast planar-polarization anisotropy imaging (CUP2AI).

From: Single-shot two-dimensional nano-size mapping of fluorescent molecules by ultrafast polarization anisotropy imaging

Fig. 1: Compressed ultrafast planar-polarization anisotropy imaging (CUP2AI).The alt text for this image may have been generated using AI.

a Simplified schematic of the CUP2AI system. BBO beta barium borate, BPF band-pass filter, BS beam splitter, CyL cylindrical lens, DMD digital micro-mirror device, HWP half-wave plate, ImL imaging lens, M mirror, P (P0, P1, and P2): linear polarizers, ReL (ReL0, ReL1, and ReL2): relay lenses, SL: stereoscopic lens, SPF: short-pass filter. The red and blue beams represent the original femtosecond laser light and its second harmonic, respectively. The yellow beam represents the imaging optical path. The polarization axes of the polarizers are represented by the double-headed arrows. The excitation laser pulse is polarized along the vertical direction (\(y\)). A more detailed system design is illustrated in Supplementary Fig. 1. b Top-view of the laser sheet exciting a thin section in the \(x\)-\(y\) plane inside a fluorescent sample. c DMD reflects two beam paths from the original imaging beam from SL. The two reflected beams are complementarily coded (\({C}_{1}\) and \({C}_{2}\)) and collected by SL. d Close-up view of the system in front of the streak camera’s photocathode. The polarization angles of the polarizers P1 and P2 are oriented along the vertical (\(y\)) and horizontal (\(x\)) directions, respectively.

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