Imperial College London
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Professor SirJohnPendry

Faculty of Natural Sciences, Department of Physics

Chair in Theoretical Solid State Physics
 
 
 
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Contact

 

+44 (0)20 7594 7606j.pendry CV

 
 
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Assistant

 

Mrs Carolyn Dale +44 (0)20 7594 7579

 
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Location

 

808Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sikdar:2020:10.1038/s41377-020-00357-w,
author = {Sikdar, D and Pendry, JB and Kornyshev, AA},
doi = {10.1038/s41377-020-00357-w},
journal = {Light Sci Appl},
title = {Nanoparticle meta-grid for enhanced light extraction from light-emitting devices.},
url = {http://dx.doi.org/10.1038/s41377-020-00357-w},
volume = {9},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Based on a developed theory, we show that introducing a meta-grid of sub-wavelength-sized plasmonic nanoparticles (NPs) into existing semiconductor light-emitting-devices (LEDs) can lead to enhanced transmission of light across the LED-chip/encapsulant interface. This results from destructive interference between light reflected from the chip/encapsulant interface and light reflected by the NP meta-grid, which conspicuously increase the efficiency of light extraction from LEDs. The "meta-grid", should be inserted on top of a conventional LED chip within its usual encapsulating packaging. As described by the theory, the nanoparticle composition, size, interparticle spacing, and distance from the LED-chip surface can be tailored to facilitate maximal transmission of light emitted from the chip into its encapsulating layer by reducing the Fresnel loss. The analysis shows that transmission across a typical LED-chip/encapsulant interface at the peak emission wavelength can be boosted up to ~99%, which is otherwise mere ~84% at normal incidence. The scheme could provide improved transmission within the photon escape cone over the entire emission spectrum of an LED. This would benefit energy saving, in addition to increasing the lifetime of LEDs by reducing heating. Potentially, the scheme will be easy to implement and adopt into existing semiconductor-device technologies, and it can be used separately or in conjunction with other methods for mitigating the critical angle loss in LEDs.
AU  - Sikdar,D
AU  - Pendry,JB
AU  - Kornyshev,AA
DO  - 10.1038/s41377-020-00357-w
PY  - 2020///
TI  - Nanoparticle meta-grid for enhanced light extraction from light-emitting devices.
T2  - Light Sci Appl
UR  - http://dx.doi.org/10.1038/s41377-020-00357-w
UR  - https://www.ncbi.nlm.nih.gov/pubmed/34267191
VL  - 9
ER  -
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