Optically imprinted reconfigurable photonic elements in a VO2 nanocomposite
Optically imprinted reconfigurable photonic elements in a VO2 nanocomposite
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DOI：
10.1063/1.4893570
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发表时间：
2014-08
影响因子：
4
通讯作者：
T. Jostmeier;J. Zimmer;H. Karl;H. Krenner;M. Betz
中科院分区：
文献类型：
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作者：
T. Jostmeier;J. Zimmer;H. Karl;H. Krenner;M. Betz
我们研究了在熔融石英基质中通过离子束合成的单畴二氧化钒纳米晶体的光学和热滞后。纳米晶体表现出巨大的滞后，这使得光学产生一个长期稳定的过冷金属相持久到几乎室温。过冷和绝缘纳米晶体的空间图案具有大的介电对比度，特别是对于电信波长。我们利用这种对比度光学压印可重构光子元件包括衍射光栅以及轴上和离轴波带片。该结构允许通过相变的高度重复（>104）循环而没有结构损坏。
We investigate the optical and thermal hysteresis of single-domain vanadium dioxide nanocrystals fabricated by ion beam synthesis in a fused silica matrix. The nanocrystals exhibit a giant hysteresis, which permits to optically generate a long-time stable supercooled metallic phase persistent down to practically room temperature. Spatial patterns of supercooled and insulating nanocrystals feature a large dielectric contrast, in particular, for telecom wavelengths. We utilize this contrast to optically imprint reconfigurable photonic elements comprising diffraction gratings as well as on- and off-axis zone plates. The structures allow for highly repetitive (>104) cycling through the phase transition without structural damage.