Article
Optics
Dongjin Wu, Wanrong Gao, Ying Chang
Summary: This work presents a simplified cylinder-birefringence optical model of the human skin dermis and measures the polarization parameters of human fingernail skin. The accuracy and stability of the Mueller matrix polarization decomposition (MMPD) and the direct Mueller matrix (DMM) methods are compared under different incident and scattering angles. A significant contribution of this study is the use of a polarization-sensitive optical coherence tomography device to obtain the value of birefringence of the skin dermis from living human index finger nail images. The results provide a basis for selecting incident and scattering angles when measuring biological samples with fibrous structures in the future.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Physics, Applied
Mariacarla Gonzalez, Razvigor Ossikovski, Tatiana Novikova, Jessica C. Ramella-Roman
Summary: A Mueller matrix can characterize the polarimetric properties of a medium, and parameters like depolarization, retardance and diattenuation can be obtained through decomposition methods. The introduction of a simplified 3 x 4 Mueller matrix and decomposition algorithm provides an effective way to measure and characterize samples, calculating properties such as depolarization, retardance and orientation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Ying Chang
Summary: Understanding and revealing the mechanism or sources of medium depolarization behaviors is crucial. The paper presents an interpretation method using physical generators, different rotation matrices, and their evolutions to express depolarizing differential matrix. The expression is obtained by summing up nine physical generators. Relations between generators are derived using different rotation matrices, providing new expressions with different combinations of generators. It is found that different expressions can be seen as equivalent results obtained under different generators, explaining the mechanism of depolarization effects in media. Transformations among these expressions demonstrate the uniqueness of the interpretation method and the diversity of representations, corresponding to the mechanism of depolarization behaviors and the various possibilities of causes.
RESULTS IN PHYSICS
(2023)
Article
Optics
Y. Chang, W. Gao
Summary: This new method allows for directly obtaining polarization properties from measured macroscopic Mueller matrices without the need for decomposition. By analyzing the canonical decomposition form of macroscopic Mueller matrices, the method accurately derives the parameters representing polarization and depolarization properties of a medium. The theoretical validation demonstrates the high accuracy of this method in extracting polarization properties from measured Mueller matrices.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Engineering, Biomedical
Muaz Iqbal, Shamim Khan, Banat Gul, Manzoor Ahmad, Iftikhar Ahmad
Summary: Mueller matrix polarimetry quantifies changes in polarization of light beam through a sample, but multiple polarization effects occurring simultaneously in tissues can hinder unique interpretation. Various decomposition schemes, such as Mueller matrix transformation and Mueller matrix differential decomposition, are used to untangle these effects. Comparing these two methods for tissue and phantom samples revealed consistent total depolarization values but significant differences in total retardance. Linear fitting of the scatter plot showed good correlation between corresponding polarization parameters of the two methods.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2021)
Article
Multidisciplinary Sciences
Wanrong Gao
Summary: This work introduces the concept of anisotropic dielectric susceptibility matrix of anisotropic medium for both nondepolarizing and depolarizing medium, providing a new way of analyzing light scattering properties of anisotropic media illuminated by polarized light. The explicit expressions for the elements of the scattering matrix, Jones matrix, and Mueller matrix are given, which may prove stimulating for researchers working on new methods for analyzing light scattering properties.
SCIENTIFIC REPORTS
(2021)
Review
Optics
Colin J. R. Sheppard, Artemi Bendandi, Aymeric Le Gratiet, Alberto Diaspro
Summary: Many books on polarization provide tables of Mueller matrices. The coherency matrix is useful for interpreting Mueller matrices. We present a table of Mueller matrices M, coherency matrices C, and coherency matrix factors F for different polarization components and systems, along with simplified forms for certain cases.
Article
Optics
Colin J. R. Sheppard, Artemi Bendandi, Aymeric Le Gratiet, Alberto Diaspro
Summary: Depolarization is an important contrast mechanism in biological and medical imaging. This paper presents a historical review on polarization algebra, measures of depolarization, and purity spaces, and discusses their connections with the eigenvalues of the coherency matrix. The advantages of a barycentric eigenvalue space are outlined, and a new parameter called diattenuation-corrected purity is introduced. The use of a combination of eigenvalues of coherency matrices to specify the depolarization condition is proposed. The relationships between optical and polarimetric radar formalisms are also reviewed.
Article
Optics
Chenxiong Wang, Yiran Chen, Xiangqian Meng, Yilin Meng, Shengchao Gong, Mengxin Ren, Jingjun Xu
Summary: This study performs error analysis of a metasurface polarimeter based on a rotating metasurface. The errors in the measured Stokes parameters are formulated for the errors in the Mueller elements of the metasurface, aiming to evaluate and minimize the errors of the metasurface polarimeter.
Article
Optics
Jing-Heng Chen, Chih-Jen Yu, Chih-Ting Wu, Chien-Yuan Han
Summary: We have developed a polarimetric imaging system that can obtain complete Mueller matrix images in a short time. By incorporating a specially designed diffractive grating into the system, we can image on different focal planes simultaneously, demonstrating nine multi-focus images of a starch granule and measuring the correlation between its polarization characteristics and inner structure.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Optics
Jiawei Song, Rasit Abay, J. Scott Tyo, Andrey S. Alenin
Summary: The study introduces a machine learning based channel filtering framework for channeled polarimeters, which trains machines to predict anti-aliasing filters adaptively. Through simulation experiments, the method demonstrates advantages in reconstructing polarimetric images.
Article
Physics, Multidisciplinary
Jiachen Wan, Chuhui Wang, Chunnan Wang, Shuqing Sun, Hui Ma
Summary: Mueller matrix polarimetry is used to identify a polarization feature sensitive to subwavelength pore size variation in porous alumina samples. Existing decomposition methods and parameters are found to be insufficient in distinguishing areas with different pore sizes, and a novel angular-based parameter is proposed to linearly separate these areas.
FRONTIERS IN PHYSICS
(2022)
Article
Optics
Tongjun Bu, Conghui Shao, Yuanhuan Zhu, Tongyu Huang, Qianhao Zhao, Yanan Sun, Yi Wang, Hui Ma
Summary: In this paper, a fast-backscattering Mueller matrix imaging system was established to quantitatively probe the dynamic variation of the microscopic structure in biological tissues. The experimental results were confirmed by Monte Carlo simulations, showing that polarization imaging can effectively capture the dynamic variation in tissue microstructure, but faster speed needs to be considered when applied to living samples.
Article
Optics
Anton Sdobnov, Volodimir A. Ushenko, Liliya Trifonyuk, Olexander Dubolazov, Yuriy A. Ushenko, Alexander G. Ushenko, Irina Soltys, Vyacheslav K. Gantyuk, Alexander Bykov, Igor Meglinski
Summary: The polarization-based optical interference approach is expanded for differentiating prostate adenocarcinoma with varying grades and Gleason scores. This approach evaluates the local contrast of polarized interference patterns to determine the morphology of the biological tissue. By analyzing polarization patterns of histological sections, the developed approach accurately assesses the differentiation levels of prostate tumor tissues.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Chao He, Jintao Chang, Patrick S. Salter, Yuanxing Shen, Ben Dai, Pengcheng Li, Yihan Jin, Samlan Chandran Thodika, Mengmeng Li, Aziz Tariq, Jingyu Wang, Jacopo Antonello, Yang Dong, Ji Qi, Jianyu Lin, Daniel S. Elson, Min Zhang, Honghui He, Hui Ma, Martin J. Booth
Summary: Advances in vectorial polarization-resolved imaging have important applications in physics and clinical diagnosis. By extracting metric indicators of vector properties, hidden optical properties can be directly indicated and intriguing asymmetry can be revealed.
ADVANCED PHOTONICS
(2022)
Article
Optics
Hang Dong, Zhixin Sun, Jingyi Li, Yahui Li, Wei Zhang, Guangyong Jin
Summary: This paper calculates thermal stresses and adsorption forces to determine laser cleaning conditions and establishes relevant models. Experimental results show that the removal effect is better with increasing nanosecond pulse delay, with the best effect achieved at 600 milliseconds pulse delay. Based on the findings, the mechanisms of oxide film removal involve thermal stress against adsorption and plasma shock wave breaking the oxide layer.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Junjie Zhang, Wenjun Li, Bingtao Li, Zheng-Da Hu, Jicheng Wang, Feng Zhang, Lei Wang
Summary: A multilayer thin film device structure based on Tamm plasmons is proposed for high-performance near-infrared hot electron photodetectors. By optimizing the device structure parameters, high responsivity detection can be achieved.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hong Huang, Zhiguang Han
Summary: This paper proposes a new ghost imaging reconstruction method using ordered orthogonal Hadamard derived speckle as the illumination speckle series, and introduces the alternating direction multiplier method to improve the imaging performance. The evaluation results show that the method can achieve high-quality reconstructed images under low sampling conditions.
OPTICS COMMUNICATIONS
(2024)
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)
Article
Optics
Peihui Du, Hongfang Wang, Pengwei Li, Rukeyemuhan Abadula, Hmbat Batelbek, Min Gao
Summary: In this study, we theoretically demonstrate the strong coupling between Tamm plasmons and exciton polaritons in metal Al/DBR-molecular structures, extending the operating wavelength to the deep ultraviolet region. The coupling strength can be effectively manipulated by adjusting the structure parameters, offering potential benefits for the development of new-style optical filters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Priyanka Chaudhary, Akhilesh Kumar Mishra
Summary: We design and numerically investigate the switching dynamics between two outer waveguides in a parity-time (PT)-symmetric adiabatically coupled three waveguides nonlinear directional coupler (NLDC) system. The study shows that the device can provide switching even when the middle waveguide is nonlinear and the outer waveguides are linear. Furthermore, the effect of loss to gain ratio on critical switching power and the impact of launched light power and gain (loss) value on transmitted power are also studied.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Wei Feng, Yongcong Yi, Shuyang Li, Zhi Xiong, Boya Xie, Zhen Zeng
Summary: Traditional imaging techniques are ineffective in achieving clear underwater imaging due to the presence of scattering media. Single-pixel imaging (SPI) system based on Unet++ offers a solution for reconstructing high-quality images in highly turbid water environments.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiaorui Qu, Jufeng Zhao, Haijun Tian, Junjie Zhu, Guangmang Cui
Summary: This paper studies the structural similarity between RGB and spectral images and proposes a non-iterative Images Structure Similarity (ISS) method for fast reconstruction of spectral images. Additionally, the input of the Deep Image Prior (DIP) method is optimized for the first time by using the initial spectral data reconstructed by ISS, leading to an improved starting value for the iteration. The experimental results show that the proposed method can enhance the reconstruction quality in both spectral and spatial resolutions, while significantly reducing the reconstruction time compared to other DIP-based methods.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Donghe Sheng, Zhe Han, Zanyang Qiao, Tianpei Dong, Chenxi Wang, Huiping Tian
Summary: In this study, a distributed multi-parameter sensor based on an etched few-mode multi-core fiber is proposed, allowing simultaneous sensing of temperature, strain, and sample refractive index. By combining space division multiplexing and stimulated Brillouin scattering, the sensor achieves high sensitivity in detecting these parameters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Dehao Chen, Zhenwu Mo, Zehong Liang, Junjie Jiang, Huilin Tang, Yidan Sun, Ziyu Wang, Quanfeng Wei, Yanru Chen, Dongmei Deng
Summary: In this study, a novel family of elliptical Airyprime vortex beams (EAPVBs) is introduced, which inherits the excellent self-focusing properties of the circular Airyprime vortex beam (CAPVB). The asymmetric focusing of EAPVB leads to some novel properties, such as the splitting of high-order optical vortex and the formation of two foci. By taking advantage of these properties, EAPVB is constructed as a tunable optical bottle for particle capture.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiao Ma, Qiongchan Shao, Jian-Jun He
Summary: In this study, an SHS chip based on Su8 waveguide was designed and fabricated. By physically adjusting the metal electrodes and compensating for transmissivity fluctuations, the generation of side ripples was successfully suppressed.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hongbin Zhang, Jiansen Du, Zongtao Chi, Hailin Cong, Bin Wang
Summary: In this paper, a novel type of dual-wavelength confocal metalens is proposed to solve the spatial crosstalk between two wavelengths. The metalens can greatly reduce the spatial crosstalk and achieve high precision and efficiency in confocal imaging. It can also focus light in specific wavelength ranges, making it suitable for imaging, microscopy, and optical fiber communication.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Rui Qiu, Guanmao Zhang, Shaokai Du, Jie Liu, Hongyu Jib, Kaiyun Bi, Bochuan Xing, Guangchao Diao
Summary: Recent research has developed an achromatic metalens that shows potential for replacing traditional lenses. This study focuses on a continuously variable focus height broadband achromatic metalens for long-wavelength infrared applications. By optimizing materials and parameters, chromatic aberration is effectively corrected, making it suitable for high-resolution LWIR imaging and spectroscopy systems.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Marcos Troncoso-Costas, Gaurav Jain, Yiming Li, Mohammed Patel, Lakshmi Narayanan Venkatasubramani, Sean O'Duill, Frank Smyth, Andrew Ellis, Francisco Diaz-Otero, Colm Browning, Liam Barry
Summary: In this work, a fast-switching tuneable laser capable of wide wavelength coverage, low noise and linewidth levels suitable for high-order modulation formats is demonstrated. The laser is characterized to cover a wavelength range of 35 nm in the C-band with nanosecond switching time. It is used to successfully demonstrate 480 Gbit/s 16QAM transmission over 25 km of single-mode fiber for a wavelength range of 19 nm.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Takeshi Moriyasu, Masahiko Tani, Hideaki Kitahara, Takashi Furuya, Jessica Afalla, Toshiro Kohmoto, Daishiro Koide, Hiroki Sato, Mitsutaka Kumakura
Summary: Optical pump-terahertz probe spectroscopy was used to study the photocarrier dynamics and optical characteristics of semiconductor Si. The results showed that the thickness of Si influenced the transmitted terahertz field amplitude and peak delay time, indicating differences in photocarrier dynamics between different Si materials.
OPTICS COMMUNICATIONS
(2024)