Driven by applications in chemical sensing, biological imaging and material
characterisation, Raman spectroscopies are attracting growing interest from a variety of …

As an indispensable complement to an integer vortex beam, the fractional vortex beam has
unique physical properties such as radially notched intensity distribution, complex phase …

Optical computing holds significant promise of information processing with ultrahigh speed
and low power consumption. Recent developments in nanophotonic structures have …

As the two most representative operation modes in an optical imaging system, bright-field
imaging and phase contrast imaging can extract different morphological information on an …

Optics naturally provides us with some powerful mathematical operations. Here, we
experimentally demonstrate that during reflection or refraction at a single optical planar …

Spiral phase contrast imaging offers an excellent opportunity to observe non‐labeled
biological samples with slight variations in refractive index or thickness. However, the overall …

Microscopy is one of the main research and application areas of digital holography. Direct
access to the phase as well as amplitude profiles makes quantitative phase microscopy by …

Edge enhancement and polarization detection are critical to image transparent or low-
contrast samples. However, currently available systems are limited to performing only a …

The recent prediction and subsequent creation of electron vortex beams in a number of
laboratories occurred after almost 20 years had elapsed since the recognition of the physical …

Electron beams with helical wavefronts carrying orbital angular momentum are expected to
provide new capabilities for electron microscopy and other applications. We used …