Fig. 2: BFP imaging of the planar photonic chip, no specimens are placed on the chip. | Nature Communications

Fig. 2: BFP imaging of the planar photonic chip, no specimens are placed on the chip.

From: Single planar photonic chip with tailored angular transmission for multiple-order analog spatial differentiator

Fig. 2

a Photograph of the fabricated planar photonic chip. b Cross-sectional SEM view of the photonic chip. c Schematic of the experimental setup used to perform BFP imaging. d Experimentally measured BFP image at \(\lambda\) = 643 nm. e, f Intensity profiles along the second-order and the first-order differentiation directions in (d), respectively, together with the corresponding simulated curves. g, h Optical transfer functions extracted from (c) and (d), respectively, using quadratic and linear fitting.

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