Switchable Mirrors
نویسندگان
چکیده
منابع مشابه
Isotope Effects in Switchable Metal-Hydride Mirrors
Measurements of optical reflectance, transmittance, and electrical resistivity on the switchable mirror systems YHx and YDx show that the absorption of hydrogen induces the same variations as that of deuterium. In both cases there is a weak transparency window for the metallic dihydride (dideuteride) phase and a yellowish transparency in the insulating trihydride (trideuteride) phase. The sligh...
متن کاملQuenching of Giant Hysteresis Effects in La12zYzHx Switchable Mirrors
The giant intrinsic hysteresis as a function of hydrogen concentration x in the optical and electrical properties of the archetypal switchable mirror YHx is eliminated by alloying Y with the chemically similar La. The La12zYzHx films with z # 0.67 are essentially hysteresis-free. The origin of the large hysteresis of alloys with z $ 0.86 is the large uniaxial lattice expansion that accompanies ...
متن کاملANGLE-SCANNED PHOTOEMISSION ON YbHx: RELEVANCE FOR SWITCHABLE MIRRORS
Yttrium, lantanum and rare earth elements can be loaded with hydrogen inducing a metal–insulator transition and giving rise to optical switching from reflecting to transparent. We present angle-scanned photoemission experiments characterizing thin YbHx films grown on W(110) at room temperature. Hydrogen loading is performed in an ultrahigh-vacuum-compatible high pressure (1 bar) reaction cell. ...
متن کاملHighly absorbing black Mg and rare-earth-Mg switchable mirrors
Apart from a reflecting and a transparent state, rare-earth-Mg alloys ~RE-Mg! exhibit also a highly absorbing, black state during loading with hydrogen. The occurrence of such a black state is due to the disproportionation into subwavelength size REH21e and Mg grains during the first hydrogen loading. While the optical properties of REHx change continuously with a further increase in hydrogen c...
متن کاملStructural, electrical, and optical properties of La1ÀzYzHx switchable mirrors
Thin La12zYzHx films, in the composition range 0,z,1 and 0,x,3, are studied using x-ray diffraction, dc resistivity measurements, reflectance-transmittance measurements, and ellipsometry in the visible and nearinfrared spectral range. For x50 the structural phase diagram is similar to that of the bulk system. Upon hydrogen absorption and desorption, the La12zYzHx films do not disproportionate. ...
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ژورنال
عنوان ژورنال: Europhysics News
سال: 2001
ISSN: 0531-7479,1432-1092
DOI: 10.1051/epn:2001201