Subwavelength lattice optics by evolutionary design.
Subwavelength lattice optics by evolutionary design.
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DOI：
10.1021/nl5040573
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发表时间：
2014-12-10
期刊：
影响因子：
10.8
通讯作者：
Odom TW
中科院分区：
文献类型：
--
作者：
Huntington MD;Lauhon LJ;Odom TW
This paper describes a new class of structured optical materials—lattice opto-materials—that can manipulate the flow of visible light into a wide range of three-dimensional profiles using evolutionary design principles. Lattice opto-materials are based on the discretization of a surface into a two-dimensional (2D) subwavelength lattice whose individual lattice sites can be controlled to achieve a programmed optical response. To access a desired optical property, we designed a lattice evolutionary algorithm that includes and optimizes contributions from every element in the lattice. Lattice opto-materials can exhibit simple properties, such as on- and off-axis focusing, and can also concentrate light into multiple, discrete spots. We expanded the unit cell shapes of the lattice to achieve distinct, polarization-dependent optical responses from the same 2D patterned substrate. Finally, these lattice opto-materials can also be combined into architectures that resemble a new type of compound flat lens.
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