2,403 research outputs found
Anomalous Light Scattering by Topological -symmetric Particle Arrays
Robust topological edge modes may evolve into complex-frequency modes when a
physical system becomes non-Hermitian. We show that, while having negligible
forward optical extinction cross section, a conjugate pair of such complex
topological edge modes in a non-Hermitian -symmetric system can
give rise to an anomalous sideway scattering when they are simultaneously
excited by a plane wave. We propose a realization of such scattering state in a
linear array of subwavelength resonators coated with gain media. The prediction
is based on an analytical two-band model and verified by rigorous numerical
simulation using multiple-multipole scattering theory. The result suggests an
extreme situation where leakage of classical information is unnoticeable to the
transmitter and the receiver when such a -symmetric unit is
inserted into the communication channel.Comment: 16 pages, 8 figure
Preliminary Observations on the Effects In Vivo and In Vitro of Low Dose Laser on the Epithelia of the Bladder, Trachea and Tongue of the Mouse
The effects of low dose CW laser were studied by in vivo and in vitro systems. The experimental tissues that were used included bladders, tracheas and tongues as experimental tissues. Buddings (round surface projections) from the transitional epithelium of bladder were frequently observed 3 days after laser treatment in both in vivo and in vitro systems. The trachea and tongue were less affected. In both the in vivo and in vitro systems, some epithelial cells of the trachea showed decreased microvilli and cilia 3 days after treatment whereas the epithelial cells of the tongue revealed no response to laser treatment in both systems. Low dose laser, however, appeared to promote the rate of healing of experimental tongue ulcer: healing was about 1 day earlier in the laser treated than non-treated animals and vessel infiltration and epithelialization were detected earlier in the treated
Auto-FACE: An NMR Based Binding Site Mapping Program for Fast Chemical Exchange Protein-Ligand Systems
10.1371/journal.pone.0008943PLoS ONE52
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