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Huang Z, Cao L. Quantitative phase imaging based on holography: trends and new perspectives. LIGHT, SCIENCE & APPLICATIONS 2024; 13:145. [PMID: 38937443 PMCID: PMC11211409 DOI: 10.1038/s41377-024-01453-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 04/07/2024] [Accepted: 04/10/2024] [Indexed: 06/29/2024]
Abstract
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 technology has given fresh energy to physics, biology, and materials science. Digital holography (DH) possesses the quantitative advantages of wide-field, non-contact, precise, and dynamic measurement capability for complex-waves. DH has unique capabilities for the propagation of optical fields by measuring light scattering with phase information. It offers quantitative visualization of the refractive index and thickness distribution of weak absorption samples, which plays a vital role in the pathophysiology of various diseases and the characterization of various materials. It provides a possibility to bridge the gap between the imaging and scattering disciplines. The propagation of wavefront is described by the complex amplitude. The complex-value in the complex-domain is reconstructed from the intensity-value measurement by camera in the real-domain. Here, we regard the process of holographic recording and reconstruction as a transformation between complex-domain and real-domain, and discuss the mathematics and physical principles of reconstruction. We review the DH in underlying principles, technical approaches, and the breadth of applications. We conclude with emerging challenges and opportunities based on combining holographic imaging with other methodologies that expand the scope and utility of holographic imaging even further. The multidisciplinary nature brings technology and application experts together in label-free cell biology, analytical chemistry, clinical sciences, wavefront sensing, and semiconductor production.
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Affiliation(s)
- Zhengzhong Huang
- Department of Precision Instrument, Tsinghua University, Beijing, 100084, China
| | - Liangcai Cao
- Department of Precision Instrument, Tsinghua University, Beijing, 100084, China.
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Mahmud MS, Ruh D, Rohrbach A. ROCS microscopy with distinct zero-order blocking. OPTICS EXPRESS 2022; 30:44339-44349. [PMID: 36522860 DOI: 10.1364/oe.467966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/11/2022] [Indexed: 06/17/2023]
Abstract
Research in modern light microscopy continuously seeks to improve spatial and temporal resolution in combination with user-friendly, cost-effective imaging systems. Among different label-free imaging approaches, Rotating Coherent Scattering (ROCS) microscopy in darkfield mode achieves superior resolution and contrast without image reconstructions, which is especially helpful in life cell experiments. Here we demonstrate how to achieve 145 nm resolution with an amplitude transmission mask for spatial filtering. This mask blocks the reflected 0-th order focus at 12 distinct positions, thereby increasing the effective aperture for the light back-scattered from the object. We further show how angular correlation analysis between coherent raw images helps to estimate the information content from different illumination directions.
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Optometry for a short-sighted microscope. Biophys J 2021; 120:4301-4304. [PMID: 34509502 DOI: 10.1016/j.bpj.2021.09.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/01/2021] [Accepted: 09/07/2021] [Indexed: 11/21/2022] Open
Abstract
Evanescent-wave scattering is a topic in classical electrodynamics and in the study of colloidal particles near a boundary. However, how such near-surface scattering at subcellular refractive-index heterogeneities degrades the excitation confinement in biological total internal reflection fluorescence microscopy has not been well studied. An elegant theoretical work by Axelrod and Axelrod now addresses this very relevant question and reveals that-even when scattered-evanescent light preserves some of its surprising optical properties.
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Priest L, Peters JS, Kukura P. Scattering-based Light Microscopy: From Metal Nanoparticles to Single Proteins. Chem Rev 2021; 121:11937-11970. [PMID: 34587448 PMCID: PMC8517954 DOI: 10.1021/acs.chemrev.1c00271] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Indexed: 02/02/2023]
Abstract
Our ability to detect, image, and quantify nanoscopic objects and molecules with visible light has undergone dramatic improvements over the past few decades. While fluorescence has historically been the go-to contrast mechanism for ultrasensitive light microscopy due to its superior background suppression and specificity, recent developments based on light scattering have reached single-molecule sensitivity. They also have the advantages of universal applicability and the ability to obtain information about the species of interest beyond its presence and location. Many of the recent advances are driven by novel approaches to illumination, detection, and background suppression, all aimed at isolating and maximizing the signal of interest. Here, we review these developments grouped according to the basic principles used, namely darkfield imaging, interferometric detection, and surface plasmon resonance microscopy.
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Affiliation(s)
| | | | - Philipp Kukura
- Physical and Theoretical
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
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Saguy A, Jünger F, Peleg A, Ferdman B, Nehme E, Rohrbach A, Shechtman Y. Deep-ROCS: from speckle patterns to superior-resolved images by deep learning in rotating coherent scattering microscopy. OPTICS EXPRESS 2021; 29:23877-23887. [PMID: 34614644 DOI: 10.1364/oe.424730] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 07/02/2021] [Indexed: 06/13/2023]
Abstract
Rotating coherent scattering (ROCS) microscopy is a label-free imaging technique that overcomes the optical diffraction limit by adding up the scattered laser light from a sample obliquely illuminated from different angles. Although ROCS imaging achieves 150 nm spatial and 10 ms temporal resolution, simply summing different speckle patterns may cause loss of sample information. In this paper we present Deep-ROCS, a neural network-based technique that generates a superior-resolved image by efficient numerical combination of a set of differently illuminated images. We show that Deep-ROCS can reconstruct super-resolved images more accurately than conventional ROCS microscopy, retrieving high-frequency information from a small number (6) of speckle images. We demonstrate the performance of Deep-ROCS experimentally on 200 nm beads and by computer simulations, where we show its potential for even more complex structures such as a filament network.
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Zheng C, Jin D, He Y, Lin H, Hu J, Yaqoob Z, So PTC, Zhou R. High spatial and temporal resolution synthetic aperture phase microscopy. ADVANCED PHOTONICS 2020; 2:065002. [PMID: 33870104 PMCID: PMC8049284 DOI: 10.1117/1.ap.2.6.065002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A new optical microscopy technique, termed high spatial and temporal resolution synthetic aperture phase microscopy (HISTR-SAPM), is proposed to improve the lateral resolution of wide-field coherent imaging. Under plane wave illumination, the resolution is increased by twofold to around 260 nm, while achieving millisecond-level temporal resolution. In HISTR-SAPM, digital micromirror devices are used to actively change the sample illumination beam angle at high speed with high stability. An off-axis interferometer is used to measure the sample scattered complex fields, which are then processed to reconstruct high-resolution phase images. Using HISTR-SAPM, we are able to map the height profiles of subwavelength photonic structures and resolve the period structures that have 198 nm linewidth and 132 nm gap (i.e., a full pitch of 330 nm). As the reconstruction averages out laser speckle noise while maintaining high temporal resolution, HISTR-SAPM further enables imaging and quantification of nanoscale dynamics of live cells, such as red blood cell membrane fluctuations and subcellular structure dynamics within nucleated cells. We envision that HISTR-SAPM will broadly benefit research in material science and biology.
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Affiliation(s)
- Cheng Zheng
- The Chinese University of Hong Kong, Department of Biomedical Engineering, Hong Kong, China
- Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, Massachusetts, United States
| | - Di Jin
- Massachusetts Institute of Technology, Computer Science and Artificial Intelligence Laboratory, Cambridge, Massachusetts, United States
| | - Yanping He
- The Chinese University of Hong Kong, Department of Biomedical Engineering, Hong Kong, China
| | - Hongtao Lin
- Zhejiang University, College of Information Science and Electronic Engineering, Hangzhou, China
| | - Juejun Hu
- Massachusetts Institute of Technology, Department of Materials Science and Engineering, Cambridge, Massachusetts, United States
| | - Zahid Yaqoob
- Massachusetts Institute of Technology, Laser Biomedical Research Center, Cambridge, Massachusetts, United States
| | - Peter T. C So
- Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, Massachusetts, United States
- Massachusetts Institute of Technology, Laser Biomedical Research Center, Cambridge, Massachusetts, United States
- Massachusetts Institute of Technology, Department of Biological Engineering, Cambridge, Massachusetts, United States
| | - Renjie Zhou
- The Chinese University of Hong Kong, Department of Biomedical Engineering, Hong Kong, China
- The Chinese University of Hong Kong, Shun Hing Institute of Advanced Engineering, Hong Kong, China
- Address all correspondence to Renjie Zhou,
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Jia Y, Lu J, Chang X, Hu X. A lateral super-resolution imaging method using structured illumination without phase shift. NANOTECHNOLOGY AND PRECISION ENGINEERING 2019. [DOI: 10.1016/j.npe.2019.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Brunstein M, Salomon A, Oheim M. Decoding the Information Contained in Fluorophore Radiation Patterns. ACS NANO 2018; 12:11725-11730. [PMID: 30995713 DOI: 10.1021/acsnano.8b08696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Dipole radiation patterns change when a fluorescent molecule comes close to the boundary between media of different refractive indices. Near-interface molecules emit mostly into the higher-index medium, predominantly around the critical angle. The radiation pattern encodes information about the emitter distance, orientation, and the refractive index of the embedding medium. Analyses of the supercritical angle fluorescence on pupil plane images can retrieve this information and have been applied both for refractometry with subcellular resolution and for the detection of metabolically active cancerous cells. In this issue of ACS Nano, Ferdman et al. employ this strategy in a label-free assay for detecting single bacteria, based on measuring the refractive-index change produced by bacterial growth in a fluorophore-coated microfluidic channel.
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Affiliation(s)
- Maia Brunstein
- CNRS, UMR 8118, Brain Physiology Laboratory , 45 rue des Saints Pères , Paris F-75006 France
- Fédération de Recherche en Neurosciences FR3636, Faculté de Sciences Fondamentales et Biomédicales , Université Paris Descartes , PRES Sorbonne Paris Cité , Paris F-75006 , France
- Chaire d'excellence Université Sorbonne Paris Cité , Paris F-75006 France
| | - Adi Salomon
- Department of Chemistry , Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Martin Oheim
- CNRS, UMR 8118, Brain Physiology Laboratory , 45 rue des Saints Pères , Paris F-75006 France
- Fédération de Recherche en Neurosciences FR3636, Faculté de Sciences Fondamentales et Biomédicales , Université Paris Descartes , PRES Sorbonne Paris Cité , Paris F-75006 , France
- Chaire d'excellence Université Sorbonne Paris Cité , Paris F-75006 France
- Joseph Meyerhof Invited Professor, Department of Biomolecular Sciences , Weizmann Institute for Science , Rehovot 7610001 , Israel
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