Ben Johns
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View article: Identifying Exceptional Points in Two-Dimensional Excitons Coupled to an Open Optical Cavity
Identifying Exceptional Points in Two-Dimensional Excitons Coupled to an Open Optical Cavity Open
Strong coupling in the conventional sense requires that the Rabi cycling process between two interacting states is faster than other dissipation rates. Some recent experimental findings show intriguing properties that were attributed to po…
View article: UV-SERS monitoring of plasmonic photodegradation of biomolecules on aluminum platforms decorated with rhodium nanoparticles
UV-SERS monitoring of plasmonic photodegradation of biomolecules on aluminum platforms decorated with rhodium nanoparticles Open
Al decorated with Rh nanoparticles (Rh NPs) was studied as a UV-SERS substrate. Spectroscopic data provided a clear view of the performance and revealed biomolecule photodegradation and oxidation driven by hot electrons and holes generated…
View article: Private sector tuberculosis care quality during the COVID-19 pandemic: A repeated cross-sectional standardized patients study of adherence to national TB guidelines in urban Nigeria
Private sector tuberculosis care quality during the COVID-19 pandemic: A repeated cross-sectional standardized patients study of adherence to national TB guidelines in urban Nigeria Open
Only a third of TB cases in Nigeria in 2020 were diagnosed and notified, in part due to low detection and underreporting from the private health sector. Using a standardized patient (SP) survey approach, we assessed how management of presu…
View article: Controlling Electron Mobility of Strongly Coupled Organic Semiconductors in Mirrorless Cavities
Controlling Electron Mobility of Strongly Coupled Organic Semiconductors in Mirrorless Cavities Open
Recent experiments on the strong light‐matter coupling between an organic semiconductor and a plasmonic mode propose an unconventional way to enhance conductivity. Herein, it is shown that mirrorless cavities can boost conductivity by simp…
View article: Understanding the Nature of Vibro-Polaritonic States in Water and Heavy Water
Understanding the Nature of Vibro-Polaritonic States in Water and Heavy Water Open
One of the most popular subjects now being researched in molecular science is strong light-matter coupling. The introduction of vibrational strong coupling and the formation vibro-polaritonic states tend to modify chemical reactivity, ener…
View article: Dispersion engineering of infrared epsilon-near-zero modes by strong coupling to optical cavities
Dispersion engineering of infrared epsilon-near-zero modes by strong coupling to optical cavities Open
Epsilon-near-zero (ENZ) materials have recently emerged as a promising platform for infrared nanophotonics. A significant challenge in the design of ENZ-based optics is to control the dispersion of ENZ modes that otherwise have a flat prof…
View article: Dispersion engineering of infrared epsilon-near-zero modes by strong coupling to optical cavities
Dispersion engineering of infrared epsilon-near-zero modes by strong coupling to optical cavities Open
Epsilon-near-zero (ENZ) materials have recently emerged as a promising platform for infrared nanophotonics. A significant challenge in the design of ENZ-based optics is to control the dispersion of ENZ modes, which otherwise have a flat pr…
View article: Interaction of Confined Light with Optically Structured Thin Film Organic Semiconductor Devices
Interaction of Confined Light with Optically Structured Thin Film Organic Semiconductor Devices Open
The pioneering experiments of Karl H. Drexhage explained the classical interaction of light with matter and the modification of the decay rates of an emitter.1 Here, we tried to mimic these experiments in a slightly different configuration…
View article: The Know-Do Gap: Understanding and Improving Service Quality Among Pharmacies Providing Injectable Contraceptives Through a Mystery Client Study in Nepal
The Know-Do Gap: Understanding and Improving Service Quality Among Pharmacies Providing Injectable Contraceptives Through a Mystery Client Study in Nepal Open
Nepal is one of the first countries to license pharmacists to administer injectable contraceptives, through Nepal CRS Company's (CRS) Sangini private pharmacy network. There are more than 3,400 Sangini pharmacies in Nepal, including in har…
View article: Tailoring Infrared Absorption and Thermal Emission with Ultrathin Film Interferences in Epsilon‐Near‐Zero Media
Tailoring Infrared Absorption and Thermal Emission with Ultrathin Film Interferences in Epsilon‐Near‐Zero Media Open
Dispersion Engineering The cover artwork depicts infrared light incident on a surface at different angles, which is absorbed. Correspondingly, directional thermal emission occurs with a conical profile at the same angle at which light is i…
View article: Tailoring Infrared Absorption and Thermal Emission with Ultrathin Film Interferences in Epsilon‐Near‐Zero Media
Tailoring Infrared Absorption and Thermal Emission with Ultrathin Film Interferences in Epsilon‐Near‐Zero Media Open
Engineering modal dispersions of ultrathin, planar structures enables significant control over infrared perfect absorption (PA) and thermal emission characteristics. Herein, the optical response of ultrathin, low loss, epsilon‐near‐zero (E…
View article: Surpassing the quarter-wave limit for thin film perfect absorbers with epsilon-near-zero media
Surpassing the quarter-wave limit for thin film perfect absorbers with epsilon-near-zero media Open
A conventional dielectric optical coating supports Fabry-Perot resonances if the thickness is at least a quarter-wavelength of the incident radiation. We show that for light incident obliquely, a low loss epsilon-near-zero (ENZ) thin film …
View article: Gates agronomy grant learnings: Final report
Gates agronomy grant learnings: Final report Open
This is a final evaluation report written by Abt Assoc for the BMGF Agricultural Development team covering the outcomes and lessons coming from five significant agronomy grants projects.
View article: The Role of False Tendons in Left Ventricular Remodeling and Secondary Mitral Regurgitation After Acute Myocardial Infarction
The Role of False Tendons in Left Ventricular Remodeling and Secondary Mitral Regurgitation After Acute Myocardial Infarction Open
In patients with mild to moderate LV dysfunction and normal chamber size, LVFT do not affect the development of LV remodeling or secondary/functional MR post-myocardial infarction.