We report a bowtie plasmonic quantum cascade laser antenna that can confine coherent mid-infrared radiation well below the diffraction limit. The antenna is fabricated on the facet of a mid-infrared quantum cascade laser and consists of a pair of gold fan-like segments, whose narrow ends are separated by a nanometric gap. Compared with a nano-rod antenna composed of a pair of nano-rods, the bowtie antenna efficiently suppresses the field enhancement at the outer ends of the structure, making it more suitable for spatially-resolved high-resolution chemical and biological imaging and spectroscopy. The antenna near field is characterized by an apertureless near-field scanning optical microscope; field confinement as small as 130 nm is demonstrated at a wavelength of 7.0 mum.
Previously reported changes in L-type Ca(2+) current are insufficient to account for the observed reduction in atrial APD associated with persistent AF. Up-regulation of I(K1) has a greater influence on atrial APD in the human model.
In the above-mentioned article there is an apostrophe in the middle of Sabrina's name that should not be there. Her name should read as follows: Sabrina Pope-Boyd. In addition to the above, the following two errors occurred in the abstract: (1) Top second column-should read: "and tasks assessing the impact on reaction time OF varying... ("OF " was omitted)" (2) Last line of abstract-"neurological" should be replaced by "neuropsychological".
High-power quantum cascade lasers (QCLs) working in continuous wave (cw) above 400K are presented. The material was grown by low-pressure metal organic vapor-phase epitaxy and processed into narrow buried heterostructure lasers. A cw output power of 204mW was obtained at 300K with an 8.38μm wavelength, 3mm long and 7.5μm wide coated laser. The device operates in cw mode above 400K, which exceeds the previous maximum cw temperature operation of QCLs by approximately 60K. Preliminary reliability data obtained by accelerated aging tests indicate a remarkable robustness of the lasers.
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