Simultaneous Large Mode Index and High Quality Factor in Infrared Hyperbolic Metamaterials
Simultaneous Large Mode Index and High Quality Factor in Infrared Hyperbolic Metamaterials
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DOI：
10.1021/acsphotonics.8b01097
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发表时间：
2018-10
期刊：
影响因子：
7
通讯作者：
P. Sohr;Dongxia Wei;S. Tomasulo;M. Yakes;S. Law
中科院分区：
文献类型：
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作者：
P. Sohr;Dongxia Wei;S. Tomasulo;M. Yakes;S. Law
半导体双曲超材料包括交替的掺杂（金属）和未掺杂（电介质）亚波长半导体层。这些材料支持称为体积等离子体激元的高波矢量模式。在这里，我们研究了三种半导体系统中体积等离子体激元的质量和模态指数：Si:InGaAs/InAlAs、Si:InAs/GaSb 和 Si:InAs/AlSb。我们能够展示高达 15 的模态指数，高于其各自波长范围内的任何其他人造双曲超材料。我们实现这一目标的同时保持了高达 14 的质量因子，与相同的材料系统相当。了解这些半导体双曲超材料的材料组合如何影响体积等离子体激元，为开发可调谐、低损耗红外光电器件奠定了基础。
Semiconductor hyperbolic metamaterials comprise alternating doped (metal) and undoped (dielectric) subwavelength semiconductor layers. These materials support high wavevector modes called volume plasmon polaritons. Here, we investigate the quality and modal indices of volume plasmon polaritons in three semiconductor systems: Si:InGaAs/InAlAs, Si:InAs/GaSb, and Si:InAs/AlSb. We are able to demonstrate modal indices as high as 15, which is higher than any other artificial hyperbolic metamaterial within its respective wavelength range. We achieve this while maintaining quality factors as high as 14, comparable to those same material systems. Understanding of how the material combinations of these semiconductor hyperbolic metamaterials affect the volume plasmon polaritons provides the groundwork for the development of tunable, low-loss, infrared optoelectronic devices.