27 papers · ranked by Valyu relevance
Ori Katz, Pierre Heidmann, Mathias Fink, Sylvain Gigan
Imaging with optical resolution through and inside complex samples is a difficult challenge with important applications in many fields. The fundamental problem is that inhomogeneous samples, such as biological tissues, randomly scatter and diffuse light, impeding conventional image formation. Despite many advancements…
Axelle Kerstens, Nikky Corthout, Benjamin Pavie, Zengjin Huang + 3 more
'Frank Vernaillen' 'Greetje Vande Velde' 'Sebastian Munck'] Background Current mesoscale 3D imaging techniques are limited to transparent or cleared samples or require the use of X-rays. This is a severe limitation for many research areas, as the 3D color surface morphology of opaque samples-for example, intact adult…
Hyung Seok Lee, Soon-Woo Cho, Gyeong Hun Kim, Myung Yung Jeong + 3 more
'Young Jae Won' 'Chang-Seok Kim' 'Gonzalo Pajares Martinsanz'] We have developed a modified optical frequency domain imaging (OFDI) system that performs parallel imaging of three-dimensional (3D) surface profiles by using the space division multiplexing (SDM) method with dual-area swept sourced beams. We have also…
Calum Williams, George S. D. Gordon, Timothy D. Wilkinson, Sarah E. Bohndiek
'Sarah E. Bohndiek'] Conventional cameras, such as in smartphones, capture wideband red, green and blue (RGB) spectral components, replicating human vision. Multispectral imaging (MSI) captures spatial and spectral information beyond our vision but typically requires bulky optical components and is expensive. Snapshot…
Shuonan Shan, Fangyuan Zhao, Zinan Li, Linbin Luo + 1 more
Optical metrology and perception technologies employ light as an information carrier to enable non-contact, high-precision measurement of geometry, dynamics, and material properties. They are widely deployed in industrial and consumer domains, from nanoscale defect inspection in semiconductor manufacturing to…
Zhengzhong Huang, Liangcai Cao
In 1948, Dennis Gabor proposed the concept of holography, providing a pioneering solution to a quantitative description of the optical wavefront. After 75 years of development, holographic imaging has become a powerful tool for optical wavefront measurement and quantitative phase imaging. The emergence of this…
Mohammadreza Ashrafian, Leila Yousefi
Using conventional imaging techniques, the maximum obtainable resolution of an object is limited to about half the wavelength of the incident light, a phenomenon known as the diffraction limit. This limitation poses significant challenges in fields requiring high-resolution imaging, such as microscopy and…
Lincoln Clark, Yang Xu, Cat-Uyen Phan, David J. Byrne + 5 more
Nonlocal metasurfaces enable all-optical processing of spatial information in optical fields. Here, we demonstrate a topology-optimised metasurface that switches between phase-contrast and brightfield imaging modalities via polarisation control, eliminating the need to reposition optical components or use computational…
Isaac Nape, Andrew Forbes
Transparent objects are invisible to traditional cameras because they can only detect intensity fluctuations, necessitating the need for interferometry followed by computationally intensive digital image processing. Now it is shown that the necessary transformations can be performed optically by combining machine…
Georg Ramer, Ufuk Yilmaz, Savda Sam, Bernhard Lendl
We demonstrate a novel approach for bottom-illuminated atomic force microscopy infrared spectroscopy (AFM-IR). This nearfield technique is suitable for AFM-IR measurements in liquids, taking advantage of an attenuated total reflection (ATR) setup where the developing evanescent wave is used for photothermal excitation…
Xiaohua Feng, Liang Gao
Diffuse optical tomography (DOT) is well known to be ill-posed and suffers from a poor resolution. While time domain DOT can bolster the resolution by time-gating to extract weakly scattering photons, it is often confronted by an inferior signal to noise ratio and a low measurement density. This is particularly…
Hodaya Klimovsky, Omer Shavit, Carine Julien, Ilya Olevsko + 6 more
Ultra-thin, transparent films are being used as protective layers on semiconductors, solar cells, as well as for nano-composite materials and optical coatings. Nano-sensors, photonic devices and calibration tools for axial super-resolution microscopies, all rely on the controlled fabrication and analysis of ultra-thin…
Authors not listed
Water at interfaces exhibits unique properties that differ markedly from bulk water. In particular, a myriad of water-interface-related enhanced reactivity including on-water catalysis and microdroplet chemistry has been documented since 1980s but remains mechanistically unclear. This review focuses on recent advances…
Mingsheng Li, Sheng Xiao, Hongli Ni, Guangrui Ding + 4 more
In vivo IR spectroscopy faces challenges due to poor sensitivity in reflection mode and low resolution at micrometer scale. To break this barrier, we report an oblique photothermal microscope (OPTM) to enable ultrasensitive IR spectroscopic imaging of live subjects at sub-micron resolution. Classic photothermal…
Bingying Chen, Bo-Jui Chang, Felix Zhou, Stephan Daetwyler + 8 more
Fast volumetric imaging of large fluorescent samples with high-resolution is required for many biological applications. Oblique plane microscopy (OPM) provides high spatiotemporal resolution, but the field of view is typically limited by its optical train and the pixel number of the camera. Mechanically scanning the…
Taeyong Chang, Giorgio Adamo, Nikolay I. Zheludev
Improvement of label-free far-field resolution of optical imaging is possible with prior knowledge of the object such as its sparsity or accumulated by a posteriori examination of a similar class of object1-4. We show that the sole knowledge of the object's limited size is another fundamental resource to achieve…
Sujit Kumar Sahoo, Dongliang Tang, Cuong Dang
Multispectral imaging plays an important role in many applications from astronomical imaging, earth observation to biomedical imaging. However, the current technologies are complex with multiple alignmentsensitive components, predetermined spatial and spectral parameters by manufactures. Here, we demonstrate a…
Zhongqiang Li, Stella Mary, Thomas V Johnson, Ji Yi
Adaptive optics (AO) has been instrumental in ophthalmic imaging, by correcting wavefront aberrations in ocular optics and achieving diffraction-limited resolution. Current state-of-the-art AO retinal imaging systems use mirror-based optics to avoid surface reflection and chromatic aberrations, requiring a large system…
Stephan Daetwyler, Bo-Jui Chang, Bingying Chen, Felix Zhou + 1 more
Understanding the intricate interplay and inter-connectivity of biological processes across an entire organism is important in various fields of biology, including cardiovascular research, neuroscience, and developmental biology. Here, we present a mesoscopic oblique plane microscope (OPM) that enables whole organism…
Yuan Yuan, Hui Chen
In turbid media, scattering of light scrambles information of the incident beam and represents an obstacle to optical imaging. Noninvasive imaging through opaque layers is challenging for dynamic and wide-field objects due to unreliable image reconstruction processes. We here propose a new perspective to solve these…
Xingchen Zhao, Peng Tao, Zhenhuan Yi, Lida Zhang + 3 more
cross-spectrum Authors: ['Xingchen Zhao' 'Peng Tao' 'Zhenhuan Yi' 'Lida Zhang' 'M. Suhail Zubairy' 'Yanhua Shih' 'Marlan O. Scully'] We develop a method based on the cross-spectrum of an intensity-modulated CW laser, which can extract a signal from an extremely noisy environment and image objects hidden in strongly…
Yide Zhang, Ufuk Yilmaz, Liam O’Faolain, Bernhard Lendl + 1 more
Atomic force microscopy-infrared spectroscopy (AFM-IR) is a photothermal scanning probe technique that combines nanoscale spatial resolution with the chemical analysis capability of mid-infrared spectroscopy. Using this hybrid technique, chemical identification down to the single molecule level has been demonstrated.…
Jan Christoph Thiele, Emanuel Pfitzner, Philipp Kukura
Light scattering by nanoscale objects is a fundamental physical property defined by their scattering cross-section and thus polarisability. Over the past decade, a number of studies have demonstrated single molecule sensitivity, by imaging the interference between coherent scattering from the object of interest with a…
Authors not listed
The self-organization of colloidal nanoparticles into complex structures, both in equilibrium and out-of-equilibrium, is a critical area in colloidal science with potential applications in creating new functional materials. While equilibrium assemblies yield thermodynamically stable and periodic structures…
Vijayakumar Anand
Speckle patterns are formed by random interferences of mutually coherent beams. While speckles are often considered as an unwanted noise in many areas, they also formed the foundation for the development of numerous speckle-based imaging, holography and sensing technologies. In the recent years, artificial speckle…
Authors not listed
Near-infrared (NIR) emitting materials underpin emerging medical diagnostics and therapeutic bionanotechnologies. In particular, the NIR-II window (1000 – 1700 nm) allows for enhanced penetration depth and image clarity in vivo by minimizing light-tissue interactions. Organic materials are advantageous due to their…
Hanchen Shen, Feiyi Sun, Xinyan Zhu, Jianyu Zhang + 11 more
Fluorescence imaging in the second near-infrared window (NIR-II, 1000-1700 nm) using small-molecule dyes is highly potential for clinical use. However, many NIR-II dyes suffer from the emission quenching effect and extremely low quantum yields (QYs) in the practical usage forms. The AIE strategy has been successfully…