Quantifying the role of surface plasmon excitation and hot carrier transport in plasmonic devices

Nature Communications
Giulia TagliabueHarry A Atwater

Abstract

Harnessing photoexcited "hot" carriers in metallic nanostructures could define a new phase of non-equilibrium optoelectronics for photodetection and photocatalysis. Surface plasmons are considered pivotal for enabling efficient operation of hot carrier devices. Clarifying the fundamental role of plasmon excitation is therefore critical for exploiting their full potential. Here, we measure the internal quantum efficiency in photoexcited gold (Au)-gallium nitride (GaN) Schottky diodes to elucidate and quantify the distinct roles of surface plasmon excitation, hot carrier transport, and carrier injection in device performance. We show that plasmon excitation does not influence the electronic processes occurring within the hot carrier device. Instead, the metal band structure and carrier transport processes dictate the observed hot carrier photocurrent distribution. The excellent agreement with parameter-free calculations indicates that photoexcited electrons generated in ultra-thin Au nanostructures impinge ballistically on the Au-GaN interface, suggesting the possibility for hot carrier collection without substantial energy losses via thermalization.

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Citations

Feb 16, 2019·Sensors·Marco SturaroAlessandro Martucci
Feb 28, 2019·Faraday Discussions·Sabrina SimoncelliEmiliano Cortés
Mar 12, 2019·Faraday Discussions·Priyank V KumarDavid J Norris
Jul 3, 2020·Light, Science & Applications·Guillaume BaffouRomain Quidant
Jul 29, 2020·Nature Materials·Giulia TagliabueHarry A Atwater
Oct 27, 2020·Advanced Science·Hyunhwa LeeJeong Young Park
Feb 27, 2021·Nanotechnology·Tingting LiuShuyuan Xiao
Apr 28, 2021·ACS Nano·Yonatan Sivan, Yonatan Dubi
Jun 29, 2021·Light, Science & Applications·Guillaume BaffouRomain Quidant
Nov 15, 2019·Chemical Reviews·Alexandra GelléAudrey Moores
May 14, 2020·Nano Letters·Matteo BarelliFrancesco Buatier de Mongeot
Feb 23, 2019·Nano Letters·Evangelina PensaStefan A Maier
Jun 13, 2020·Chemical Reviews·Maciej Da BrowskiHrvoje Petek
Jan 9, 2021·Nano Letters·Yocefu HattoriJacinto Sá
May 24, 2019·The Journal of Physical Chemistry Letters·Robin SchürmannIlko Bald
Dec 15, 2020·ACS Nano·Emiliano CortésPrineha Narang
Apr 15, 2020·ACS Nano·Giulia TagliabueHarry A Atwater
Sep 18, 2021·Chemical Society Reviews·Jian ZhaoJinghong Li
Oct 21, 2019··Giulia TagliabueHarry A. Atwater

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Methods Mentioned

BETA
irradiate
light scattering

Software Mentioned

COMSOL
JDFTx

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