Results 31 to 40 of about 171,881 (156)

Complex Refractive Index Determination Via Microspectroscopy Through Magnifying Optics: Challenges and Opportunities

Small Methods, EarlyView.
Microspectroscopy combines a standard optical microscope with a spectrometer to measure reflectance and transmittance of samples down to the microscale. A numerical formalism that explicitly accounts for the high numerical aperture of magnifying optics retrieves complex refractive indices.
Julian Schwarz, Johannes Bauer, Mathias Rommel, Andreas Hutzler   +3 more
wiley   +1 more source

Visualization of White Matter Fiber Tracts of Brain Tissue Sections with Wide-field Imaging Mueller Polarimetry. [PDF]

, 2020
Identification of white matter fiber tracts of the brain is crucial for delineating the tumor border during neurosurgery. A custom-built Mueller polarimeter was used in reflection configuration for the wide-field imaging of thick sections of fixed human ...
Zubak, Irena, Kovari, Eniko, Mezouar, Mohammed Hachem, Novikova, Tatiana, Schucht, Philippe, Pierangelo, Angelo, Lee, Hee Ryung, Mezouar, Hachem Mohammed, Goldberg, Johannes, Kovari, Eniko Veronika, Hewer, Ekkehard, Murek, Michael, Raabe, Andreas   +12 more
core   +1 more source

Mueller matrix polarimetry for improved liver fibrosis diagnosis [PDF]

Optics Letters, 2012
An experimental Mueller matrix polarimeter is used to quantify human liver fibrosis by measuring retardance and depolarization of thin biopsies. The former parameter is sensitive to fibrillar collagen, the latter is specifically sensitive to fibrillar collagen around blood vessels, which is not significant for liver fibrosis diagnosis.
Dubreuil, Matthieu, Babilotte, P., Loïc, Martin, Sevrain, David, Rivet, Sylvain, Le Grand, Yann, Le Brun, Guy, Turlin, Bruno, Le Jeune, Bernard   +8 more
openaire   +4 more sources

Aerosol Retrieval Over Ocean From DPC‐2/GF‐5(02): Using RemoTAP Extended With a 3‐Parameter Ocean Bio‐Optical Model and Comparisons With a 1‐Parameter Model

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 20, 28 October 2026.
Abstract Multi‐angle polarimetric instruments (MAPs) enable the retrieval of essential aerosol properties over oceanic regions. MAPs retrieval algorithms commonly use a 1‐parameter ocean bio‐optical model (OBM), based on chlorophyll‐a concentration only to represent optical properties over open waters (case‐1), whereas the coastal water (mixture of ...
Cheng Fan, Jeon‐Teo Dong, Guangliang Fu, Sha Lu, Zihan Zhang, Neranga K. Hannadige, Meng Gao, Peng‐Wang Zhai, Gerrit de Leeuw, Zhengqiang Li, Otto Hasekamp   +10 more
wiley   +1 more source

Polarization‐Dependence of Nonlinear Optical Effects in Silicon: The Case of Ultrafast Processing

Advanced Physics Research, Volume 5, Issue 10, October 2026.
The dependence of the input polarization for the nonlinear optical propagation in silicon is investigated theoretically and experimentally. The perturbative regime is examined using pump‐probe shadowgraphy and nonlinear transmission, whereas the case of permanent laser‐induced modifications is addressed using a combination of Raman micro‐spectroscopy ...
Namig Alasgarzade, Alessandro Alberucci, Stree V. Arumugam, Markus Blothe, Maxime Chambonneau, Chandroth P. Jisha, Stefan Nolte   +6 more
wiley   +1 more source

Discrepancy of coordinate system selection in backscattering Mueller matrix polarimetry: exploring photon coordinate system transformation invariants [PDF]

In biomedical studies, Mueller matrix polarimetry is gaining increasing attention because it can comprehensively characterize polarization-related vectorial properties of the sample, which are crucial for microstructural identification and evaluation ...

core   +1 more source

Two‐Photon Fluorescence and Second‐Harmonic Generation Microscopy: Principles and Biomedical Applications

Journal of Biophotonics, Volume 19, Issue 10, October 2026.
Compared with single‐photon methods, TPM enables deep‐tissue imaging using near‐infrared light, with excitation confined to the focal plane, thereby reducing photodamage. SHG microscopy images noncentrosymmetric biological structures such as collagen and myosin without fluorescent labels, offering direct structural contrast.
Kausalya Neelavara Makkithaya, Gagan Raju, Subir Das, Ajeetkumar Patil, Rajesh Kumar, Yury V. Kistenev, Guan‐Yu Zhuo, Nirmal Mazumder   +7 more
wiley   +1 more source

Optimizing Mueller polarimetry in noisy systems through over-determination

Applied Optics, 2021
Mueller polarimetry measurements are increasingly being used to image highly dynamic and short-lived phenomena such as plasma discharges. For phenomena such as these, exposure times below 1 µs must be used. Unfortunately, these low exposure times significantly reduce the signal-to-noise ratio, making accurate and consistent ...
Philpott, Harry, Garcia-Caurel, Enrique, Guaitella, Olivier, Sobota, Ana   +3 more
openaire   +5 more sources

Dataset 1

, 2021
Over-determined Mueller polarimetry of overlapping pieces of ...
Elementary Processes in Gas Discharges, Guaitella, O., Non-thermal plasmas and their interaction with targets, Sobota, A.; id_orcid, Garcia-Caurel, E., Centre National de la Recherche Scientifique, Institut Polytechnique de Paris, Philpott, H., Plasma & Materials Processing   +8 more
core   +2 more sources

Light‐Imprinted Chirality in Nanomaterials: From Principles to Applications

Advanced Science, Volume 13, Issue 49, 3 September 2026.
Light‐induced chirality represents a transformative paradigm for fabricating chiral nanostructures. This review provides a comprehensive framework encompassing light‐based strategies for imprinting and tuning chirality in nanomaterials, which guides researchers in harnessing light to create next‐generation functional materials.
Xinru Jin, Emiliano Cortés, Alexander O. Govorov, Tao Ding   +3 more
wiley   +1 more source