We demonstrate negative refraction at telecommunication wavelengths through plasmon-photon hybridization on a simple microcavity with metallic mirrors. Instead of using conventional metals, the plasmonic excitations are provided by a heavily doped semiconductor which enables us to tune them into resonance with the infrared photon modes of the cavity. In this way, the dispersion of the resultant hybrid cavity modes can be widely adjusted. In particular, negative dispersion and negative refraction at telecommunication wavelengths on an all-ZnO monolithical cavity are demonstrated.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.23.030079 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Severe Microbial Keratitis in Virgin and Transplanted Cornea-Probability of Visual Acuity Improvement.
J Clin Med
December 2024
Department of Ophthalmology, Medical University of Warsaw, Sierakowskiego 13, 01-756 Warsaw, Poland.
To evaluate visual acuity improvement and identify contributing factors in patients with severe keratitis affecting both virgin and transplanted corneas, treated at a hospital. A retrospective analysis was conducted on 497 patients with unilateral corneal ulcers treated at a tertiary referral center between 2008 and 2023. Data included distance (BCVA) and near best-corrected visual acuity at initial presentation and at discharge, treatments before hospital admission, demographic details, risk factors, clinical signs and symptoms, ancillary test results, and management strategies.
View Article and Find Full Text PDFOrientation-dependent photonic bandgaps in gold-dust weevil scales and their titania bioreplicates.
Beilstein J Nanotechnol
January 2025
Department for Chemistry and Physics of Materials, University of Salzburg, Jakob-Haringer-Str. 2a, 5020 Salzburg, Austria.
The scales of the gold-dust weevil are green because of three-dimensional diamond-type chitin-air photonic crystals with an average periodicity of about 430 nm and a chitin fill fraction of about 0.44. A single scale usually contains one to three crystallites with different lattice orientations.
View Article and Find Full Text PDFThe Associations Between Myopia and Fundus Tessellation in School Children: A Comparative Analysis of Macular and Peripapillary Regions Using Deep Learning.
Transl Vis Sci Technol
January 2025
Department of Ophthalmology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China.
Purpose: To evaluate the refractive differences among school-aged children with macular or peripapillary fundus tessellation (FT) distribution patterns, using fundus tessellation density (FTD) quantified by deep learning (DL) technology.
Methods: The cross-sectional study included 1942 school children aged six to 15 years, undergoing ocular biometric parameters, cycloplegic refraction, and fundus photography. FTD was quantified for both the macular (6 mm) and peripapillary (4 mm) regions, using DL-based image processing applied to 45° color fundus photographs.
Compartmental analysis of retinal vascular parameters and thickness in myopic eyes using SS-OCTA.
Front Med (Lausanne)
December 2024
Chongqing Key Laboratory of Prevention and Treatment on Major Blinding Diseases, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Article Synopsis
- The study examined how myopia affects the thickness and structure of retinal blood vessels using advanced imaging technology in 100 participants.
- The findings revealed that individuals with high myopia had significantly lower vessel density and thinner retinal layers, particularly noticeable in the superficial and nerve fiber layers.
- There was a noted correlation between certain ocular parameters, such as axial length to curvature radius ratio, and retinal thickness in non-high myopic eyes, while high myopic eyes showed less correlation in these aspects.
Prevalence and associations of anisometropia with spherical ametropia, cylindrical power, age, and sex, based on 134,603 refractive surgery candidates.
PLoS One
January 2025
Department of Ophthalmology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Article Synopsis
- The study investigated the prevalence and factors associated with anisometropia (a condition where each eye has a different prescription) among 134,603 refractive surgery candidates in Germany from 2010 to 2020.
- Results indicated that 17.9% of the population had anisometropia, with variables like age, sex, and spherical/cylindrical ametropia significantly affecting its occurrence—different impacts were noted in hyperopes (farsighted individuals) versus myopes (nearsighted individuals).
- The findings reveal that increased cylindrical ametropia reduced anisometropia in hyperopes, while in myopes, it correlates positively with age and spherical power, showcasing the complexity
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!