Article
Ophthalmology
Frederick A. Asare, Godwin A. Ahiakwao, Bright A. Oduro, Augustine N. Nti
Summary: This study assessed the optical quality of ready-made reading spectacles in Ghana and found that they did not meet international standards, leading to unwanted side effects. It emphasizes the need for more rigorous protocols for testing the quality and increasing public health awareness, especially for patients with significant refractive errors and ocular pathologies.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2023)
Article
Computer Science, Information Systems
Jeong-Sik Kim, Byeong Hun An, Won-Been Jeong, Seung-Woo Lee
Summary: This study investigates IPD estimation methods using eye movement tracking in VR applications. The vergence-based method shows better accuracy in estimating IPD compared to CEM-based method.
Article
Engineering, Electrical & Electronic
Koji Horiguchi, Shigeru Kobayashi, Okihiro Sugihara
Summary: A practical calculation model for loss testing of multimode optical fiber connections in short-distance local area networks is proposed, which was found to be highly consistent with measured data for both step- and graded-index multimode fibers. The method is versatile and can be applied to any type of multimode fiber.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Qinghua Song, Samira Khadir, Stephane Vezian, Benjamin Damilano, Philippe de Mierry, Sebastien Chenot, Virginie Brandli, Romain Laberdesque, Benoit Wattellier, Patrice Genevet
Summary: In this study, a new polarization-dependent optical encryption method using near-field phase encoding at metasurfaces has been developed to enhance security levels. By implementing specific phase decryption methods and orthogonal polarization illumination, a higher security level has been achieved, with potential applications in areas such as biometric recognition, secure ID cards, and optical data storage.
Article
Business
Xing-Yu (Marcos) Chu, Chun-Tuan Chang, Angela Y. Lee
Summary: The research suggests that the spatial distance between visual representations of a product and consumers can either enhance or devalue consumers' perceptions of the brand, depending on the brand image. For prestigious brands, increasing the distance can signal prestige, while for popular brands, decreasing the distance indicates social closeness with consumers.
JOURNAL OF MARKETING
(2021)
Article
Optics
Jun Wen, Xiaoyu Jiang, Xingpeng Yan, Pei Li
Summary: By changing the pixel clustering and re-locating the center of the element image, a dual-mode light field display method is proposed to maximize the width of the viewing zone at target viewing distance and enhance the viewing distance range of the light field display.
Article
Optics
Mahmoud A. Selim, Fan O. Wu, Huizhong Ren, Mercedeh Khajavikhan, Demetrios Christodoulides
Summary: This work investigates the emission intensity patterns in nonlinear waveguide arrays using concepts from optical thermodynamics. The researchers derived an exact equation describing the response of a nonlinear array and found that the patterns and brightness are governed by the optical temperature and chemical potential. The results obtained from thermodynamics were in good agreement with numerical simulations.
Article
Computer Science, Cybernetics
Hui Min Lee, Bejamin J. LI
Summary: This study explores the relationship between immersion in media and prosocial behavior through two mediating pathways: place illusion and self-plausibility. The experiment involving university undergraduates (N = 244) shows that immersion influences intention to donate and volunteer through physical presence, spatial distance, and empathy. While the self-plausibility pathway is not supported, self-presence is positively correlated with empathy and intention to volunteer and donate. These findings highlight the effectiveness of Construal Level Theory in understanding the psychological effects of immersive media and their societal implications.
INTERNATIONAL JOURNAL OF HUMAN-COMPUTER STUDIES
(2023)
Article
Materials Science, Multidisciplinary
Huan Yuan, Zheqiang Zhong, Yunhao Zhang, Bin Zhang
Summary: An all-dielectric metasurface is proposed for multi-channel image encryption in the near field and holographic imaging in the far field. The metasurface enables independent control of amplitude, phase, polarization, and wavelength to achieve pattern imaging of 12 channels. It provides an effective solution for high-capacity optical encryption and information storage applications.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Julian Barnett, Lukas Wehmeier, Andreas Hessler, Martin Lewin, Julian Pries, Matthias Wuttig, J. Michael Klopf, Susanne C. Kehr, Lukas M. Eng, Thomas Taubner
Summary: Chalcogenide phase change materials can reversibly switch between non-volatile states with vastly different optical properties, enabling novel active nanophotonic devices. In this study, infrared scattering-type scanning near-field optical microscopy (SNOM) and Kelvin probe force microscopy (KPFM) were used to investigate four states of laser-switched Ge3Sb2Te6 with nanometer lateral resolution. The research found that SNOM is sensitive to differences between crystalline and amorphous states, while KPFM has higher sensitivity to changes introduced by melt-quenching.
Article
Optics
Sungho Choi, Jongkyoon Park, Soo hoon Chew, Tsendsuren Khurelbaatar, Alexander Gliserin, Seungchul Kim, Dong eon Kim
Summary: In this study, the polarization-dependent surface plasmon resonance in bowtie nano-aperture arrays is experimentally investigated. The transmission spectra exhibit a nonlinear redshift for vertically polarized light as the gap size of the nanoaperture decreases, while the spectra remain unchanged for horizontally polarized light. Simulated charge and current distributions provide insight into the underlying mechanisms, and these findings are supported by photoemission electron microscopy.
Article
Materials Science, Multidisciplinary
Thomas F. Allard, Guillaume Weick
Summary: This study develops a quantum theory of plasmon polaritons in chains of metallic nanoparticles, revealing the polaritonic nature of the system's normal modes. The group velocities of polaritonic excitations show periodic sign changes and can be highly tunable by modifying interparticle spacing. Analytical perturbative treatment of the light-matter interaction is in good agreement with numerical calculations, and the hybridization of light and matter excitations is quantitatively analyzed through Hopfield's coefficients.
Article
Nanoscience & Nanotechnology
Yazhong Wang, Johannes Benduhn, Lukasz Baisinger, Christoph Lungenschmied, Karl Leo, Donato Spoltore
Summary: In this study, an extraction barrier for holes was intentionally introduced in organic semiconductor devices to achieve nonlinear photoresponse for distance measurements. By manipulating the illumination spot area and irradiance, the distance between the organic photodetector (OPD) and the light source can be determined accurately. The fully vacuum-deposited organic NIR optical distance photodetectors showed high potential for precise, robust, low-cost, and simple optical distance measurement setups.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Multidisciplinary
Svetislav Savovic, Alexandar Djordjevich, Branko Drljaca, Ana Simovic, Rui Min
Summary: This article investigates mode coupling in step-index multimode polymer optical fiber using the power flow equation. It found that the equilibrium mode distribution and steady-state distribution lengths are significantly shorter than their glass optical fiber counterparts. Understanding the characteristics of the POF is important for its use in communication or sensory systems.
FRONTIERS IN PHYSICS
(2022)
Article
Biochemical Research Methods
Daria M. Shcherbakova
Summary: This article discusses the design, properties, and performance of recent near-infrared and far-red calcium and voltage indicators, as well as their applications in spectral multiplexing and in vivo imaging. Perspectives for further development are also provided.
JOURNAL OF NEUROSCIENCE METHODS
(2021)