2023
DOI: 10.1021/acsphotonics.2c00862
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Constraining Continuous Topology Optimizations to Discrete Solutions for Photonic Applications

Abstract: Photonic topology optimization is a technique used to find the permittivity distribution of a device that optimizes an electromagnetic figure-of-merit. Two common versions are used: continuous density-based optimizations that optimize a gray scale permittivity defined over a grid, and discrete level-set optimizations that optimize the shape of the material boundary of a device. In this work we present a method for constraining a continuous optimization such that it is guaranteed to converge to a discrete solut… Show more

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Cited by 8 publications
(6 citation statements)
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“…Several successful systems of crosslinked EO materials have been reported, such as the widely used HLD EO material, which exhibits a stable EO coefficient exceeding 300 pm V À1 after crosslinking. 63,[110][111][112][113][114][115][116] When subjected to an environment at 85 1C for 2000 hours, the attenuation of the EO coefficient is almost negligible. Moreover, after exposure to an environment at 120 1C for 2000 hours, it retains 87% of its initial value, thereby demonstrating high reliability and compliance with the stability requirements outlined in the Telecordia GR-468-CORE standards.…”
Section: Reliability Of Eo Materials In Devicesmentioning
confidence: 99%
“…Several successful systems of crosslinked EO materials have been reported, such as the widely used HLD EO material, which exhibits a stable EO coefficient exceeding 300 pm V À1 after crosslinking. 63,[110][111][112][113][114][115][116] When subjected to an environment at 85 1C for 2000 hours, the attenuation of the EO coefficient is almost negligible. Moreover, after exposure to an environment at 120 1C for 2000 hours, it retains 87% of its initial value, thereby demonstrating high reliability and compliance with the stability requirements outlined in the Telecordia GR-468-CORE standards.…”
Section: Reliability Of Eo Materials In Devicesmentioning
confidence: 99%
“…In our optimization, we employ several different techniques to ensure that the free-form structures converge to a state that is both physical and realisable. We introduce an increasing binarisation factor as the optimization progresses that eventually forces the final pattern to be either material or air [49], [50]. The patterns are also periodically blurred with a Gaussian filter that ensures the minimum feature is larger than limitations imposed by fabrication precision [51], [52].…”
Section: Numerical Implementationmentioning
confidence: 99%
“…Metasurfaces, which consist of arrays of artificially fabricated nanostructures, have the prominent ability to control the electromagnetic wave properties for desired functions [12][13][14][15][16][17]. The Metasurface-based color routers can orient the light rather than filtering it, which effectively increases the imaging efficiency [18][19][20][21][22][23][24][25][26]. However, the previously reported color metasurface-based routers suffer from having complicated structures, posing high accuracy requirement for their fabrication [19][20][21][22][23][24][25][26][27][28].…”
Section: Introductionmentioning
confidence: 99%
“…The Metasurface-based color routers can orient the light rather than filtering it, which effectively increases the imaging efficiency [18][19][20][21][22][23][24][25][26]. However, the previously reported color metasurface-based routers suffer from having complicated structures, posing high accuracy requirement for their fabrication [19][20][21][22][23][24][25][26][27][28].…”
Section: Introductionmentioning
confidence: 99%