The two-dimensional spatial structure of a stationary monochromatic refracted field is studied theoretically for the case of its exciting in a transparent homogeneous medium by incidence of a Gaussian light beam under total internal reflection. For that, the exact solution of refracted field in the form of a Fourier integral is used. It is shown that this spatial structure exhibits properties characteristic of the fields in strongly inhomogeneous and absorbing media: field attenuation as it propagates deep into the medium, noticeable diffraction beam divergence near the boundary itself, non-rectilinear nature of propagation in the medium, and non-exponential attenuation along its depth.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1364/JOSAA.475088 | DOI Listing |
Trends Microbiol
January 2025
Institute of Structural and Molecular Biology, Department of Biological Sciences, Birkbeck College, London, UK; Institute of Structural and Molecular Biology, Division of Biosciences, University College London, London, UK. Electronic address:
Within both abiotic and host environments, bacteria typically exist as diverse, multispecies communities and have crucial roles in human health, agriculture, and industry. In these communities, bacteria compete for resources, and these competitive interactions can shape the overall population structure and community function. Studying bacterial community dynamics requires experimental model systems that capture the different interaction networks between bacteria and their surroundings.
View Article and Find Full Text PDFJ Control Release
January 2025
Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, via R. Cozzi 55, 20125 Milano, Italy; BioNanoMedicine Center NANOMIB, Università degli Studi di Milano-Bicocca, Italy. Electronic address:
Graphene oxide (GO) is an amphiphilic and versatile graphene-based nanomaterial that is extremely promising for targeted drug delivery, which aims to administer drugs in a spatially and temporally controlled manner. A typical GO nanocarrier features a polyethylene glycol coating and conjugation to an active targeting ligand. However, it is challenging to accurately model GO dots, because of their intrinsically complex and not unique structure.
View Article and Find Full Text PDFDev Biol
January 2025
Institute for Stem Cell Science and Regenerative Medicine (iBRIC-inStem), GKVK-Post, Bellary Road, Bengaluru, Karnataka 560065, India. Electronic address:
Dev Cell
January 2025
Program in Epithelial Biology and Center for Definitive and Curative Medicine, Stanford University, Stanford, CA, USA. Electronic address:
Human pluripotent stem cell-derived tissue engineering offers great promise for designer cell-based personalized therapeutics, but harnessing such potential requires a deeper understanding of tissue-level interactions. We previously developed a cell replacement manufacturing method for ectoderm-derived skin epithelium. However, it remains challenging to manufacture the endoderm-derived esophageal epithelium despite possessing a similar stratified epithelial structure.
View Article and Find Full Text PDFACS Nano
January 2025
Institute of Photonics and of Nanotechnologies- National Researcher Council (IFN-CNR), LNESS Laboratory, Piazza Leonardo Da Vinci 32, 20133 Milano, Italy.
Manipulating the optical landscape of single quantum dots (QDs) is essential to increase the emitted photon output, enhancing their performance as chemical sensors and single-photon sources. Micro-optical structures are typically used for this task, with the drawback of a large size compared to the embedded single emitters. Nanophotonic architectures hold the promise to modify dramatically the emission properties of QDs, boosting light-matter interactions at the nanoscale, in ultracompact devices.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!