Optimized emission in nanorod arrays through quasi-aperiodic inverse design

We investigate a new class of quasi-aperiodic nanorod structures for the enhancement of incoherent light emission. We identify one optimized structure using an inverse design algorithm and the finite-difference time-domain method. We carry out emission calculations on both the optimized structure as...

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Bibliographic Details
Published in:Optics letters 2015-06, Vol.40 (11), p.2672-2675
Main Authors: Anderson, P Duke, Povinelli, Michelle L
Format: Article
Language:English
Subjects:
Arrays
Design optimization
Emission
Finite difference method
Inverse design
Mathematical analysis
Nanostructure
Spontaneous emission
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Summary:We investigate a new class of quasi-aperiodic nanorod structures for the enhancement of incoherent light emission. We identify one optimized structure using an inverse design algorithm and the finite-difference time-domain method. We carry out emission calculations on both the optimized structure as well as a simple periodic array. The optimized structure achieves nearly perfect light extraction while maintaining a high spontaneous emission rate. Overall, the optimized structure can achieve a 20%-42% increase in external quantum efficiency relative to a simple periodic design, depending on material quality.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.40.002672