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.475088DOI Listing

Publication Analysis

Top Keywords

spatial structure
12
refracted field
12
gaussian light
8
light beam
8
beam total
8
total internal
8
internal reflection
8
structure refracted
4
field
4
field gaussian
4

Similar Publications

Emerging models to study competitive interactions within bacterial communities.

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 PDF

Unveiling the drug delivery mechanism of graphene oxide dots at the atomic scale.

J 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 PDF
Article Synopsis
  • The lower urinary tract, consisting of the bladder and urethra, develops from the cloaca, with the bladder forming from the urogenital sinus and the urethra extending into the genital tubercle.
  • Engineering a fully functional bladder lining is challenging, and the urethral epithelium's immune roles are under-researched, highlighting the need for a better understanding of the epithelial and mesenchymal interactions that drive development.
  • This study identified specific genes involved in bladder and urethra development in mice, revealing differences in gene expression patterns related to sex and offering insights for future regenerative therapies.
View Article and Find Full Text PDF

A spatiotemporal and machine-learning platform facilitates the manufacturing of hPSC-derived esophageal mucosa.

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 PDF

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 PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!