منابع مشابه
Evanescent science
weekly. “Because,” came the reply, “that’s what our marketing department decided would be best.” Like another remarkable book about blood, published 20 years ago, Richard Titmuss’s The Gift Relationship, the tale that Stephen Hall unfolds with such vivid command is that of our society in microcosm. Taxes may be inescapable, but death is discretionary, its conquest the last scientific frontier. ...
متن کاملEvanescent Wave Illumination
When an electromagnetic wave (light) in a dielectric medium of index n1 is incident upon an interface of a different dielectric material of a lower optical density, n2 at an angle θ1 greater than the critical angle, θc = sin−1(n2/n1), total internal reflection (TIR) occurs. Although all of the incident energy is reflected, an electromagnetic field with exponentially decreasing intensity propaga...
متن کاملEvanescent black holes.
A renormalizable theory of quantum gravity coupled to a dilaton and conformal matter in two space-time dimensions is analyzed. The theory is shown to be exactly solvable classically. Included among the exact classical solutions are configurations describing the formation of a black hole by collapsing matter. The problem of Hawking radiation and backreaction of the metric is analyzed to leading ...
متن کاملHybrid silicon evanescent devices
The indirect bandgap of Si has been a key hurdle in the achievement of optical gain elements. Raman lasers and amplifiers1-3 have been demonstrated, and optical gain in nanopatterned Si4 has also been observed, but an electrically pumped all-Si gain element has yet to be realized. An alternative to creating an electrically pumped all-Si gain mechanism is to take prefabricated lasers and couple ...
متن کاملEvanescent Airy beams
In this Letter we propose the concept of the evanescent Airy beam. We analyze the structure of the ideal evanescent Airy beam, which initial profile has the Airy form, while the spectral decomposition consists of only evanescent partial waves. Also, we discuss the refraction of the Airy beam through the interface and investigate the field of the transmitted evanescent Airy beam. c © 2009 Optica...
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ژورنال
عنوان ژورنال: Current Biology
سال: 1998
ISSN: 0960-9822
DOI: 10.1016/s0960-9822(98)70005-3