Broadband polarization measurement plays a crucial role in numerous fields,spanning from fundamental physics to a wide range of practical applications.However,traditional approaches typically rely on combinations of v...Broadband polarization measurement plays a crucial role in numerous fields,spanning from fundamental physics to a wide range of practical applications.However,traditional approaches typically rely on combinations of various dispersive optical elements,requiring bulky systems and complicated time-consuming multiple procedures.Here we have achieved broadband spectropolarimetry based on single-shot images for spatial intensity distributions of polychromatic vector beams.A custom-designed diffractive optical element and a vortex retarder convert the incident polychromatic waves into structured vector beams:the former diffracts light of different wavelengths into concentric circles of different radii,while the latter codes their polarization information into intensity distributions along the azimuthal direction.The validation experiments verify our exceptional measurement accuracy(RMS errors<1%)for each Stokes component in the visible light range(400-700 nm),with good spectral(<0.8 nm)and temporal(an output rate of 100 Hz)resolutions.We have further employed our broadband polarimeter to study the mutarotation of glucose,making direct observations of temporal evolutions of chemical reactions accessible.Our work has significantly broadened the toolboxes of spectropolarimetry,which can potentially incubate various disruptive applications that depend on broadband polarization measurements.展开更多
基金National Natural Science Foundation of China(62475285,61975235)Natural Science Foundation of Hunan Province(2019JJ40342)。
文摘Broadband polarization measurement plays a crucial role in numerous fields,spanning from fundamental physics to a wide range of practical applications.However,traditional approaches typically rely on combinations of various dispersive optical elements,requiring bulky systems and complicated time-consuming multiple procedures.Here we have achieved broadband spectropolarimetry based on single-shot images for spatial intensity distributions of polychromatic vector beams.A custom-designed diffractive optical element and a vortex retarder convert the incident polychromatic waves into structured vector beams:the former diffracts light of different wavelengths into concentric circles of different radii,while the latter codes their polarization information into intensity distributions along the azimuthal direction.The validation experiments verify our exceptional measurement accuracy(RMS errors<1%)for each Stokes component in the visible light range(400-700 nm),with good spectral(<0.8 nm)and temporal(an output rate of 100 Hz)resolutions.We have further employed our broadband polarimeter to study the mutarotation of glucose,making direct observations of temporal evolutions of chemical reactions accessible.Our work has significantly broadened the toolboxes of spectropolarimetry,which can potentially incubate various disruptive applications that depend on broadband polarization measurements.
