We consider a generalization of the Dicke model. This model describes localized, physically separated, saturable excitations, such as excitons bound on impurities, coupled to a single long-lived mode of an optical cavity. We consider the thermal equilibrium of this model at a fixed total number of excitons and photons. We find a phase in which both the cavity field and the excitonic polarizatio...

The relationship between lactose hydrolysis and absorption of released glucose was investigated by determining the kinetics of lactose digestion by jejunal biopsies incubated in vitro. Lactase activity in intact biopsies correlated with conventional assay of tissue homogenates (r = 0.85, p less than 0.001), and glucose uptake from 28 mM lactose was directly proportional to lactase activity (r =...

Decreased Mg intake and low Mg status have been associated with a number of major health concerns such as diabetes mellitus type II, coronary heart disease, and osteoporosis. While information on Mg intake is available, relatively little is known on dietary factors influencing Mg bioavailability. While it is established that Mg absorption is based on a combination of a non-saturable and a satur...

Carbon nanotubes (CNT) are an attractive material for photonic applications due to their nonlinear optical properties, such as the nonlinear saturable absorption and high third order nonlinearity. However their utilization has been hindered by the lack of flexibility on the device design which rises from the current methods of Carbon nanotube deposition within the optical system. A suitable app...

Periodic nanostructuring can enhance the optical nonlinearity of plasmonic metals by several orders of magnitude. By patterning a gold film, the largest sub-100 femtosecond nonlinearity is achieved, which is suitable for terahertz rate all-optical data processing as well as ultrafast optical limiters and saturable absorbers.

In this study, CdS, CuS, and Ag 2 S nanoparticles (NPs) were synthesized by a chemical bath procedure in the presence of polyvinyl alcohol (PVA) as polymer stabilizer. Morphological studies followed X-ray diffraction (XRD) atomic force microscopy (AFM) revealed monolithic small size NPs. The average crystalline S, CuS nanocomposites was 18.1, 26.7, 21.7 nm, respectively. UV-Vis absorption photo...

MXenes are two-dimensional materials with a rich set of chemical and electromagnetic properties, the latter including saturable absorption intense surface plasmon resonances. To fully harness functionality for applications in optics, electronics, sensing, it is important to understand interaction light on atomic femtosecond dimensions. Here, we use ultrafast electron diffraction high-resolution...

Abstract Halide perovskite quantum dots (PQDs) have exhibited significantly superior nonlinear optical properties compared to traditional semiconductor materials thanks their peculiar physical and electronic structures. By further improving the of PQDs, it is expected adapt ultrafast photonics applications. This work reported methylammonium lead bromide-graphene (CH 3 NH PbBr -G) composites syn...

Two-dimensional (2D) ternary chalcogenides have attracted great attentions because of their novel chemical and physical properties arising from the synergistic effect stoichiometric variation with additional third element compared binary counterparts. Here, high-quality 2D tantalum nickel selenide (Ta2NiSe5) nanosheets are successfully fabricated by a liquid-phase exfoliation (LPE) method. The ...