Topological Differential Microscopy Based on the Spin–Orbit Interaction of Light in a Natural Crystal

Song, Bowen; Wen, Shuangchun; Shu, Weixing

doi:10.1021/acsphotonics.2c01449

Cited by 9 publications

(4 citation statements)

References 48 publications

(76 reference statements)

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“…The differential operation of DIC microscopy provides superior edge detection ability for transparent samples. , However, conventional DIC microscopy applies the differential operation only in one single direction . Edges loss their information, when they align parallel to the differential direction.…”

Section: Resultsmentioning

confidence: 99%

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Vector Differential Interference Contrast Microscopy Based on a 3-in-1 Phase Mask through a Dynamic Diffractive Optical Element

Gao,

Xiong,

Yetisen

et al. 2023

ACS Photonics

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Differential interference contrast (DIC) microscopy is highly desirable in label-free imaging for transparent biological samples. It avoids potential photobleaching and phototoxicity from the contrast agents, such as staining and fluorescence. Commercial DIC microscopes typically use multiple optical elements to construct a phase contrast device and require a further phase shift unit to render quantitative phase imaging. Moreover, conventional DIC microscopes perform the differential operation exclusively along a single direction, constraining their use to differential phase visualization rather than providing the actual phase information for quantitative phase imaging (QPI) applications. Here, a supercompact quantitative DIC microscopy method with a vector differential operation is developed. The featured functions of the vector DIC, namely, vector differential operation, sample imaging, and phase shifting, are integrated into a single diffractive optical element (DOE) device. The DIC microscopy was miniaturized via the off-the-shelf DOE device, converting customary designing paradigm from piling up individual optical elements to the spatial manipulation of the phase, forming the 3-in-1 phase mask. The tube lens, Wollaston/Normasiki prism, and phase shift unit are replaced by a single dynamic 3-in-1 phase mask. Apart from the illumination, the operating element is merely the off-the-shelf DOE device implementing the 3-in-1 phase mask, rendering the vector DIC as an add-on module for the commercial light microscope. The phase maps in orthogonal differential directions are retrieved simultaneously from multiple heterodyne carriers to achieve quantitative phase imaging from the complete phase gradient.

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Section: Resultsmentioning

confidence: 99%

“…19,20 However, conventional DIC microscopy applies the differential operation only in one single direction. 32 Edges loss their information, when they align parallel to the differential direction. The vector differential operation prevents this limitation by simultaneously creating two orthogonal differential directions.…”

Section: Acs Photonicsmentioning

confidence: 99%

Vector Differential Interference Contrast Microscopy Based on a 3-in-1 Phase Mask through a Dynamic Diffractive Optical Element

Gao,

Xiong,

Yetisen

et al. 2023

ACS Photonics

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“…It should be noted that single optical interfaces, as well as stacks of optically thin films, commonly exhibit transmission and reflection properties that enable phase visualization techniques that fall into this category. ,− In this Perspective, however, we exclusively focus on approaches based on metasurfaces and gratings.…”

Section: Metasurface-enabled Phase Imaging Methodsmentioning

confidence: 99%

New Avenues for Phase Imaging: Optical Metasurfaces

Priscilla,

Sulejman,

Roberts

et al. 2024

ACS Photonics

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Visualizing the phase of an optical field is fundamental to applications ranging from biological microscopy through to material science. Its importance is evidenced by the award of the 1953 Nobel Prize to Frits Zernike for his invention of the phase contrast microscope. Conventional phase imaging techniques, including Zernike phase contrast, differential interference contrast, and interferometry, often rely on bulky optical components and macroscopic propagation distances. These factors hinder the miniaturization and integration into ultracompact imaging systems. Furthermore, computational methods also present challenges due to computational complexity, potentially compromising speed and energy efficiency. The recent emergence of the use of nano-optics, including thin films and metasurfaces, in image processing has opened up possibilities for a new class of compact methods for phase imaging. These nanostructured devices have been shown to permit phase visualization, and we believe that they hold the potential to enable the next generation of imaging systems and photodetectors in a broad range of applications.

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“…The photonic spin Hall effect (PSHE) is an optical analogy of the electronic spin Hall effect and its inherent physical mechanism is the spin-orbit interaction of light, which delineates the mutual influence of the spin (circular polarization) and the trajectory of a light beam. [1][2][3][4][5] When a linearly polarized light propagates in an inhomogeneous medium, the components with the opposite spins drift along the opposite directions perpendicular to the refractive-index gradient, causing the light beam to split into two circularly polarized beams separated on either side of the incident plane. The spin-dependent splitting in the PSHE is sensitive to the state of the incident photons and the physical parameters of the interface; thus, it holds great promise for various applications such as biosensing, optical differential manipulation, image processing, precision metrology, and so forth.…”

Section: Introductionmentioning

confidence: 99%