Fig. 3: Experimental results for polarizing beam splitters. | Light: Science & Applications

Fig. 3: Experimental results for polarizing beam splitters.

From: Broadband vectorial ultrathin optics with experimental efficiency up to 99% in the visible region via universal approximators

Fig. 3

a Experimental setup used to characterize the samples (SL: supercontinuum laser, MLP: motorized linear polarizer, BS: beam splitter, LS: lens, OBJ: objective, CAM: CMOS camera, PD: calibrated photodetector, SP: sample). b Transmission efficiency of the 600 nm polarizer for different wavelengths and input polarization angles Δθ. c Comparison between theory (solid line) and experiment (dashed line) for the 600 nm polarizer transmission curves. d Experimentally measured polarization efficiencies at different wavelengths for four different samples working around the common laser line wavelengths of 533, 600, 750 and 900 nm. e SEM images of a characteristic sample for the polarizer designed at 900 nm. f Silicon-based flat-optics state of the art in the visible range. The figure presents the experimentally measured transmission efficiency for previously reported devices in the visible region and for this work

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