Switchable Chiral Mirrors
نویسندگان
چکیده
منابع مشابه
Chiral Mirrors
Conventional mirrors convert right-handed circularly polarized waves (RCP) into left-handed circularly polarized waves (LCP) and vice versa, see Fig. 1(a-c). Here we demonstrate a novel type of chiral mirror that will reflect one circular polarization without changing its handedness, while absorbing waves of the opposite handedness, see Fig. 1(d-f). This functionality, which fundamentally relie...
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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...
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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 ...
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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. ...
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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...
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ژورنال
عنوان ژورنال: Advanced Optical Materials
سال: 2020
ISSN: 2195-1071,2195-1071
DOI: 10.1002/adom.202000247