25 papers · ranked by Valyu relevance
Lincoln Clark, Yang Xu, Cat-Uyen Phan, David J. Byrne + 5 more
Nonlocal metasurfaces enable all-optical processing of spatial information in optical fields. Here, we demonstrate a topology-optimised metasurface that switches between phase-contrast and brightfield imaging modalities via polarisation control, eliminating the need to reposition optical components or use computational…
Yengwoo Son, Seung Pil Bang, Choul Yong Park, Aldo Vagge + 1 more
As surgeries using multifocal intraocular lenses (IOLs) to correct both cataracts and presbyopia have become common, it has become essential for clinicians to understand their basic optical characteristics to select the optimal lens for their patients. However, there are relatively few review articles on optics that…
Theodore A. Corcovilos
Geometric optics is often described as tracing the paths of non-diffracting rays through an optical system. In the paraxial limit, ray traces can be calculated using ray transfer matrices (colloquially, ABCD matrices), which are 2 × 2 matrices acting on the height and slope of the rays. A known limitation of ray…
Andrew Grieco
A novel dual-mode optical vector spectrum analyzer is demonstrated that is suitable for the characterization of both passive devices as well as active laser sources. It can measure loss, phase response, and dispersion properties over a broad bandwidth, with high resolution and dynamic range.
Junyi Huang, Dong Zhao, Jixuan Shi, Hongliang Zhang + 6 more
It is intractable to perform information processing and computation on single ultrafast optical pulses, within picoseconds or even femtoseconds. Here, we experimentally demonstrate an optical spatiotemporal differentiator, a mirror-symmetry-breaking dielectric metagrating, which performs analog computations of both…
M. Marini, A. Nardini, R. Martínez Vázquez, C. Conci + 9 more
Non-linear excitation microscopy offers several advantages for in-vivo imaging compared to conventional confocal techniques. However, tissue penetration can still be an issue due to scattering and spherical aberrations induced on focused beams by the tissue. The use of low numerical aperture objectives to pass through…
Amelia Carolina Sparavigna
In an article by Thibault et al., 2002, we can find measurements of Raman linewidths in the Q branch of carbon monoxide, for mixtures with Argon at different temperatures. A plot is available for the Q(5) line with a fitted Voigt function. Here we show that a q-Gaussian Tsallis function can be used for fitting this…
Ali Najjar Amiri, Aycan Deniz Vit, Kazim Gorgulu, Emir Salih Magden
Expanding applications in optical communications, computing, and sensing continue to drive the need for high-performance integrated photonic components. Designing these on-chip systems with arbitrary functionality requires beyond what is possible with physical intuition, for which machine learning-based methods have…
Lujia Zhao, Yu-Ang Liu, Huiru Ji, Haibo Wang + 4 more
'Donglin Ma' 'Isabelle Ledoux-Rak'] In the simulation of partially coherent light propagation within optical systems utilizing the Wigner function, the constraints imposed by the Fourier transform necessitate that the dimensions of the input and output matrices remain congruent. Consequently, the extent of the image…
Jun Yu, Shu Zhan, Toru Kurihara, Sylvain Girard
The optical filter is critical in many applications requiring wide-angle imaging perception. However, the transmission curve of the typical optical filter will change at an oblique incident angle due to the optical path of the incident light change. In this study, we propose a wide-angular tolerance optical filter…
Thomas Goossens, Zheng Lyu, Jamyuen Ko, Gordon Wan + 2 more
'Brian A. Wandell'] Combining image sensor simulation tools (e.g., ISETCam) with physically based ray tracing (e.g., PBRT) offers possibilities for designing and evaluating novel imaging systems as well as for synthesizing physically accurate, labeled images for machine learning. One practical limitation has been…
Ziyang Chen, Yufei Zhang, Bin Luo, Hong Guo
Optical time-frequency transfer establishes the metrological linkage in large-scale clock networks, which facilitates various applications. Fiber-based transfer benefits from the abundant deployment of fiber infrastructures to achieve this advantage. In this review, we provide an overview of the advances in optical…
Shiyu Li, Chia Wei Hsu
The rapidly advancing capabilities in nanophotonic design are enabling complex functionalities limited mainly by physical bounds. The efficiency of transmission is a major consideration, but its ultimate limit remains unknown for most systems. Here, we introduce a matrix formalism that puts a fundamental bound on the…
Prajit Dhara, Babak N. Saif, Jeffrey H. Shapiro, Saikat Guha
Slepian developed the Prolate Spheroidal Wavefunction (PSW) spatial-mode basis, which forms the normal modes of the Fresnel-propagation kernel of a free-space optical communications channel bookended by hard-circular apertures. The zero-th order PSW mode has the highest power-transfer eigenvalue, exciting which on the…
Maximilian Hoffmann, Jörg Henninger, Lars Richter, Benjamin Judkewitz
Optical imaging is a powerful tool to visualise and measure neuronal activity. However, due to the size and opacity of vertebrate brains it has until now been impossible to simultaneously image neuronal circuits at cellular resolution across the entire adult brain. This is true even for the smallest known vertebrate…
Md Nafiz Hannan, Timothy M. Baran
Treatment planning for light-based therapies including photodynamic therapy requires tissue optical property knowledge. These are recoverable with spatially-resolved diffuse reflectance spectroscopy (DRS), but requires precise source-detector separation (SDS) determination and time-consuming simulations. An artificial…
Maciej Piejko, Benjamin Boglio, Bianca Patrahau, Kripa Joseph + 4 more
In a research article published last year we reported red shifting of the charge transfer band of Reichardt’s dye in the visible spectrum when the solvent was vibrationally coupled to an optical cavity, indicating a change in the polarity of the solvent. The magnitude of the observed shifts correlated with the alkyl…
Naoki Fukutake, Shuichi Makita, Yoshiaki Yasuno
We construct an accurate imaging theory for optical coherence tomography/microscopy (OCT/OCM) without approximations to calculate precise optical resolution and imaging characteristics. Our theory represents a broadband light source using a four-dimensional (4D) pupil function with a dimension for light frequency…
Stefan Zondag, Jasper Schuurmans, Arnab Chaudhuri, Robin Visser + 6 more
Photocatalysis for small molecule activation has seen significant advancements over the past decade, yet its scale-up remains a challenge due to photon attenuation effects. A promising solution lies in harnessing high photonic intensities paired with continuous-flow reactor technology. However, a deep grasp of photon…
Niklas Domdei, Jonas Müller, Lisa Renner, Julius Ameln + 3 more
The prevalence of myopia is increasing worldwide, accompanied by an increase of potentially under-corrected myopes. Because the neural pathways processing the retinal image are prone to adaptation in relation to the retinal image quality, we wondered to what extent neural contrast sensitivity (NCS) is altered in the…
Authors not listed
Molecular polaritons are hybrid states formed by the quantum mechanical interaction between light and matter. Recent experiments have shown the ability to drastically modify chemical reactions in both the ground and excited states through the hybridization of the electronic and photonic degrees of freedom. Ab initio…
Taehoon Kim, Guangying Ma, Taeyoon Son, Xincheng Yao
Intrinsic optical signal (IOS) imaging of the retina, also termed as optoretinography (ORG), promises a noninvasive method for objective assessment of retinal function. By providing unparalleled capability to differentiate individual layers of the retina, functional optical coherence tomography (OCT) has been actively…
Authors not listed
Using stable precursor C18Br6 of cyclo[18]carbon (C18) as an electron acceptor and superalkali clusters M3O (M = Li, Na, and K) as electron sources, we theoretically designed M3O@C18Br6 (M = Li, Na, and K) with potential applications in optical and electronic devices. The geometric, electronic, and optical properties…
Authors not listed
Phase change materials (PCMs) with distinct optical properties at different phases are promising candidates for programmable photonics, optical communication and photonic computing. In this work, we have studied thermo-optic effect in a PCM-based integrated photonic device comprising a film of bistable [Fe2Co2]…
Sarthak Patnaik
We know that the diffusion is defined as the movement of molecules under a potential gradient. It is characterized by the diffusion coefficient. Diffusion coefficient determination can be done via various techniques, but in this paper, we have had a broad look at interferometry based optical methods for diffusion…