Abstract
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.
Original language | English |
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Pages (from-to) | 7195-7200 |
Number of pages | 6 |
Journal | Nano letters |
Volume | 14 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 10 2014 |
Keywords
- evolutionary design
- flat lenses
- metasurfaces
- nanoholes
- nanomaterials
- optics
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering