Multifunctional photodetectors boost the development of traditional optical communication technology and emerging artificial intelligence fields, such as robotics and autonomous driving. However, the current implement...Multifunctional photodetectors boost the development of traditional optical communication technology and emerging artificial intelligence fields, such as robotics and autonomous driving. However, the current implementation of multifunctional detectors is based on the physical combination of optical lenses, gratings, and multiple photodetectors, the large size and its complex structure hinder the miniaturization, lightweight, and integration of devices. In contrast, perovskite materials have achieved remarkable progress in the field of multifunctional photodetectors due to their diverse crystal structures, simple morphology manipulation, and excellent optoelectronic properties. In this review, we first overview the crystal structures and morphology manipulation techniques of perovskite materials and then summarize the working mechanism and performance parameters of multifunctional photodetectors. Furthermore, the fabrication strategies of multifunctional perovskite photodetectors and their advancements are highlighted, including polarized light detection, spectral detection, angle-sensing detection, and selfpowered detection. Finally, the existing problems of multifunctional detectors and the perspectives of their future development are presented.展开更多
The laser trapping of untransmissive particles are discussed in this paper. Photon can generate the momentum tothe untransmissive particle by diffraction and reflection on the surface of the particles. We tried laser ...The laser trapping of untransmissive particles are discussed in this paper. Photon can generate the momentum tothe untransmissive particle by diffraction and reflection on the surface of the particles. We tried laser trapping ofuntransmissive particles using an attractive force caused by the diffraction and radiation force caused by reflection.The laser trapping system includes CW YAG laser, which has 1.064 μm in wave length and an optical microscope.The motions of particles were monitored by a CCD camera on the top of the microscope and recordedby PC connected to the CCD camera.展开更多
Micro-manipulation,a cornerstone of structured light applications in biomedicine and microfluidics,necessitates beams adaptable to diverse operational demands.The double-ring Airy-Gaussian vortex beam(DRAGVB)provides ...Micro-manipulation,a cornerstone of structured light applications in biomedicine and microfluidics,necessitates beams adaptable to diverse operational demands.The double-ring Airy-Gaussian vortex beam(DRAGVB)provides an innovative solution,generating varied dynamical modes through tailored parameter selection.Notably,a continuous optical bottle structure,induced by uniform vortex interactions,facilitates the trapping and storage of multiple microparticles,with its spatial position and geometric properties adjustable via core parameter modulation to suit specific needs.Furthermore,a multi-point focusing structure,governed by the absolute difference in topological charges between inner and outer rings,enables precise microparticle capture at tunable focal plane positions,provided the charge difference exceeds one.Additionally,a distinctive structure driven by a single primary-secondary phase spiral produces photon helical convergence that spirals around the transmission axis,with its rotational direction and radius determined by the topological charge configuration,allowing for particle twisting and helical optical sieving.Micro-manipulation in the three modalities was experimentally realized,and their regulation mechanisms were deeply investigated.DRAGVB enables stronger trapping at lower powers,overcomes single-plane trapping and tunability limits of conventional structured light,and addresses the fixed-particle-count issue of annular beams,enabling flexible,controllable optical trapping and micro-manipulation.展开更多
基金supported financially by the National Key R&D Program of China (Nos. 2018YFA0208501 and 2018YFA0703200)the National Natural Science Foundation of China (NSFC, Nos. 52103236, 91963212, 21875260)Beijing National Laboratory for Molecular Sciences (No. BNLMSCXXM-202005)。
文摘Multifunctional photodetectors boost the development of traditional optical communication technology and emerging artificial intelligence fields, such as robotics and autonomous driving. However, the current implementation of multifunctional detectors is based on the physical combination of optical lenses, gratings, and multiple photodetectors, the large size and its complex structure hinder the miniaturization, lightweight, and integration of devices. In contrast, perovskite materials have achieved remarkable progress in the field of multifunctional photodetectors due to their diverse crystal structures, simple morphology manipulation, and excellent optoelectronic properties. In this review, we first overview the crystal structures and morphology manipulation techniques of perovskite materials and then summarize the working mechanism and performance parameters of multifunctional photodetectors. Furthermore, the fabrication strategies of multifunctional perovskite photodetectors and their advancements are highlighted, including polarized light detection, spectral detection, angle-sensing detection, and selfpowered detection. Finally, the existing problems of multifunctional detectors and the perspectives of their future development are presented.
文摘The laser trapping of untransmissive particles are discussed in this paper. Photon can generate the momentum tothe untransmissive particle by diffraction and reflection on the surface of the particles. We tried laser trapping ofuntransmissive particles using an attractive force caused by the diffraction and radiation force caused by reflection.The laser trapping system includes CW YAG laser, which has 1.064 μm in wave length and an optical microscope.The motions of particles were monitored by a CCD camera on the top of the microscope and recordedby PC connected to the CCD camera.
基金National Natural Science Foundation of China(12374281,12274311)。
文摘Micro-manipulation,a cornerstone of structured light applications in biomedicine and microfluidics,necessitates beams adaptable to diverse operational demands.The double-ring Airy-Gaussian vortex beam(DRAGVB)provides an innovative solution,generating varied dynamical modes through tailored parameter selection.Notably,a continuous optical bottle structure,induced by uniform vortex interactions,facilitates the trapping and storage of multiple microparticles,with its spatial position and geometric properties adjustable via core parameter modulation to suit specific needs.Furthermore,a multi-point focusing structure,governed by the absolute difference in topological charges between inner and outer rings,enables precise microparticle capture at tunable focal plane positions,provided the charge difference exceeds one.Additionally,a distinctive structure driven by a single primary-secondary phase spiral produces photon helical convergence that spirals around the transmission axis,with its rotational direction and radius determined by the topological charge configuration,allowing for particle twisting and helical optical sieving.Micro-manipulation in the three modalities was experimentally realized,and their regulation mechanisms were deeply investigated.DRAGVB enables stronger trapping at lower powers,overcomes single-plane trapping and tunability limits of conventional structured light,and addresses the fixed-particle-count issue of annular beams,enabling flexible,controllable optical trapping and micro-manipulation.
