Article
Biotechnology & Applied Microbiology
Michael J. Blair, Kyle P. Quinn
Summary: Quantitative Polarized Light Imaging (QPLI) is a technique used to compute the orientation of collagen fibers. In this paper, a single shot QPLI system (ssQPLI) without moving parts is presented, which can accurately quantify the fiber orientation and quickly provide pixel-wise measurements during mechanical testing. The ssQPLI system utilizes four cameras to simultaneously collect linearly polarized light in four states.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Computer Science, Interdisciplinary Applications
Mariia Borovkova, Oleksii Sieryi, Ivan Lopushenko, Natalia Kartashkina, Jens Pahnke, Alexander Bykov, Igor Meglinski
Summary: The minimum histological criterion for diagnosing Alzheimer's disease (AD) is the presence of senile plaques and neurofibrillary tangles in specific brain locations. We developed a multi-spectral Stokes polarimetric imaging approach that allows characterization of FFPE brain tissue samples to discern the stages of AD progression without sectioning and staining the tissue.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2022)
Article
Optics
Guodong Zhou, Yanqiu Li, Ke Liu
Summary: This paper proposes methods for Mueller spectrum reconstruction and Mueller CSP calibration. The Mueller CSP is modeled as a modulation matrix and an optimization problem is described to solve the Mueller spectrum. The calibrated modulation matrix is obtained by measuring the Stokes spectrum and the analyzing vector. Experimental results show high accuracy.
Article
Optics
Aishwaryadev Banerjee, Chayanjit Ghosh, Mohit U. Karkhanis, Adwait Deshpande, Erfan Pourshaban, Apratim Majumder, Hanseup Kim, Carlos H. Mastrangelo
Summary: We demonstrate the implementation of a low-power, low-profile, varifocal liquid-crystal Fresnel lens stack suitable for tunable imaging in smart contact lenses. The lens stack consists of a high-order refractive-type liquid crystal Fresnel chamber, a voltage-controlled twisted nematic cell, a linear polarizer, and a fixed offset lens. The lens stack has an aperture of 4 mm and a thickness of -980 μm. The varifocal lens requires -2.5 VRMS for a maximum optical power change of -6.5 D consuming electrical power of -2.6 μW. The maximum RMS wavefront aberration error was 0.2 μm, and the chromatic aberration was 0.008 D/nm. The average BRISQUE image quality score of the Fresnel lens was 35.23 compared to 57.23 for a curved LC lens of comparable power, indicating superior Fresnel imaging quality.
Article
Optics
Okan Atalar, Amin Arbabian
Summary: This research demonstrates the construction of a highly efficient free-space resonant polarization modulator using a suitable single crystal. Compared to state-of-the-art modulators, this modulator achieves higher modulation frequency and reduced thickness for the same input aperture, leading to significant performance improvements for various applications.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2023)
Article
Materials Science, Multidisciplinary
Jinfeng Zhao, Xiaodong Cui, Bernard Bonello, Bahram Djafari-Rouhani, Weitao Yuan, Yongdong Pan, Jie Ren, Xiaoqing Zhang, Zheng Zhong
Summary: We demonstrate experimentally and theoretically the broadband sub-diffraction and ultra-high energy density focusing of elastic wave inside planar gradient-index (GRIN) plate lenses based on thickness variation, which can potentially be used for energy harvesting and signal sensing.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
E. Chan, J. Pasztorova, R. D. Johnson, M. Songvilay, R. A. Downie, J-W G. Bos, O. Fabelo, C. Ritter, K. Beauvois, Ch Niedermayer, S-W Cheong, N. Qureshi, C. Stock
Summary: MnSb2O6 has a chiral P321 space group structure, and its magnetism is ordered in a cycloidal structure at low temperatures. By applying a magnetic field parallel to the c axis, the spin rotation plane can tilt, resulting in a mixture of cycloid and helix structures. This mixed structure facilitates ferroelectric switching.
Article
Engineering, Electrical & Electronic
Wei Wang, Nicholas Estes, Nicolas C. Garcia, Matthew Roddy, Andrew K. Bolstad, Jonathan D. Chisum
Summary: A phased-array-fed lens (PAFL) antenna is proposed, which can achieve beamforming like a phased array with array elements spaced beyond 0.5 lambda. The PAFL antenna produces high-quality scanned beams using only five active feeds, representing significant cost and power savings compared to conventional phased arrays. An optimal beamforming method and a multiobjective optimizer are presented to achieve maximum gain at any angle by controlling the radiation pattern, demonstrated on several simulated state-of-the-art lens antennas.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Biochemical Research Methods
Chi-Hsiang Lien, Zong-Hong Chen, Quoc-Hung Phan
Summary: This study successfully differentiated collagen cross-linking in a normal collagen gel matrix from that in tissues with nonenzymatic cross-linking using dual-retarder Mueller polarimetry and phase retardance measurement. This provides a quick and simple method for structural analysis of collagen.
JOURNAL OF BIOMEDICAL OPTICS
(2022)
Article
Engineering, Electrical & Electronic
Rakhi Bhattacharya, M. S. Mani Rajan, A. Sharafali, N. Ayyanar, Hassan Pakarzadeh
Summary: In this article, we experimentally measured the optical polarization and birefringence in a commercially available photonic crystal fiber (PCF) named ESM-12B. We applied a twist to the PCF using a mechanical rotator and observed that the polarization and birefringence can be controlled by adjusting the twist angle. Theoretical simulations were also conducted to optimize the twist angle and calculate the dispersion for different twist angles. The findings of this study suggest that PCF ESM-12B can be used as a polarization rotator and optical sensor.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Optics
Dmitrii E. Kukushkin, Tatiana Zhukova, Alexey Bakholdin
Summary: The study investigates the bask polarization properties of lenses with different shapes and emphasizes the importance of considering lens shape in designing lens optical systems. Calculation methods were applied and compared to demonstrate the impact on diattenuation magnitude.
Review
Optics
Qiqi Yu, Dirui Xu, Baifei Shen, Thomas E. Cowan, Hans-Peter Schlenvoigt
Summary: Polarimetry is a highly sensitive method used in material science to quantify changes of the polarization state of light when passing through matter. The development of synchrotron and XFEL sources has greatly improved X-ray polarizers, allowing for new applications in studying source and beamline parameters as well as sample characteristics. One important application is the detection of vacuum birefringence, which can be probed by combining an XFEL with a petawatt-class optical laser. This article reviews the impact of source and optical elements on X-ray polarimeters and the required qualities for detecting vacuum birefringence.
HIGH POWER LASER SCIENCE AND ENGINEERING
(2023)
Article
Biochemical Research Methods
Anton Sdobnov, Volodymir A. Ushenko, Liliya Trifonyuk, Oksana Bakun, Marta Garazdyuk, Irina V. Soltys, Olexander Dubolazov, Olexander G. Ushenko, Yuriy A. Ushenko, Alexander Bykov, Igor Meglinski
Summary: Mueller-matrix polarimetry is a powerful method for visualizing malformations in biological tissues and quantitatively evaluating disease progression. This study aims to improve the method by implementing wavelet decomposition and polarization-singular processing for differential diagnosis of local changes in tissue structure. The results show that the developed approach can accurately identify and assess benign and malignant states of prostate tissue.
JOURNAL OF BIOMEDICAL OPTICS
(2023)
Article
Nanoscience & Nanotechnology
Zin Lin, Charles Roques-Carmes, Raphael Pestourie, Marin Soljacic, Arka Majumdar, Steven G. Johnson
Summary: By codesigning a metaoptical front end with an image-processing back end, we are able to achieve superior noise sensitivity and compactness compared to optics-only or computation-only approaches. This method is demonstrated through examples of subwavelength imaging and reconstruction of multiple light sources' full polarization coherence matrices. Incorporating full wave physics in the design process is crucial for detecting discarded spectral and polarization information.
Article
Optics
Moritsugu Sakamoto, Yuki Ono, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Masayuki Tanaka, Hiroshi Ono
Summary: The effect of wavelength and polarization of illuminating light in polarization imaging for birefringent objects placed behind a scattering structure was experimentally investigated. The result shows that the spatial distribution of the birefringent object was more clearly visualized in the longer wavelength combined with circularly polarized light illumination. This finding indicates the potential of using polarization imaging with circularly polarized light illumination in the near-infrared range for visualizing birefringent objects with scattering.
OPTICS COMMUNICATIONS
(2024)
