Ultra-broadband light trapping using nanotextured decoupled graphene multilayers

Anguita, Jose, Ahmad, Muhammad, Haq, S, Allam, Jeremy and Silva, S (2016) Ultra-broadband light trapping using nanotextured decoupled graphene multilayers Science Advances, 2 (2), e1501238.

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Abstract

The ability to engineer a thin two-dimensional surface for light trapping across an ultra-broad spectral range is central for an increasing number of applications including energy, optoelectronics, and spectroscopy. Although broadband light trapping has been obtained in tall structures of carbon nanotubes with millimeter-tall dimensions, obtaining such broadband light–trapping behavior from nanometer-scale absorbers remains elusive. We report a method for trapping the optical field coincident with few-layer decoupled graphene using field localization within a disordered distribution of subwavelength-sized nanotexturing metal particles. We show that the combination of the broadband light–coupling effect from the disordered nanotexture combined with the natural thinness and remarkably high and wavelength-independent absorption of graphene results in an ultrathin (15 nm thin) yet ultra-broadband blackbody absorber, featuring 99% absorption spanning from the mid-infrared to the ultraviolet. We demonstrate the utility of our approach to produce the blackbody absorber on delicate opto-microelectromechanical infrared emitters, using a low-temperature, noncontact fabrication method, which is also large-area compatible. This development may pave a way to new fabrication methodologies for optical devices requiring light management at the nanoscale.

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :	Name Email ORCID Anguita, Jose J.Anguita@surrey.ac.uk UNSPECIFIED Ahmad, Muhammad muhammad.ahmad@surrey.ac.uk UNSPECIFIED Haq, S UNSPECIFIED UNSPECIFIED Allam, Jeremy J.Allam@surrey.ac.uk UNSPECIFIED Silva, S S.Silva@surrey.ac.uk UNSPECIFIED
Date :	26 February 2016
Identification Number :	10.1126/sciadv.1501238
Copyright Disclaimer :	2016 © The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). 10.1126/sciadv.1501238
Related URLs :	Publisher
Depositing User :	Symplectic Elements
Date Deposited :	22 Aug 2017 16:01
Last Modified :	22 Aug 2017 16:01
URI:	http://epubs.surrey.ac.uk/id/eprint/810471

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