DocumentCode :
3711507
Title :
Broadband photoelectric hot carrier collection with wafer-scale metallic-semiconductor photonic crystals
Author :
Jeffrey B. Chou;David P. Fenning; Yu Wang;Miguel Angel M?ndez Polanco;Jonathan Hwang;Asmaa El-Faer;Firas Sammoura;Jaime Viegas;Mahmoud Rasras;Alexie M. Kolpak;Yang Shao-Horn;Sang-Gook Kim
Author_Institution :
Massachusetts Institute of Technology, Cambridge, 02139, USA
fYear :
2015
fDate :
6/1/2015 12:00:00 AM
Firstpage :
1
Lastpage :
6
Abstract :
Photoelectric hot carrier generation in metal-semiconductor junctions can enable optical-to-electrical energy conversion at photon energies below the bandgap of the semiconductor. Here, we present the simulated and experimental results of our wafer-scale Au/TiO2 metallic-semiconductor photonic crystal (MSPhC). We demonstrate a broadband sub-bandgap photoresponse with a FWHM of 235 nm centered at 590 nm due to surface plasmon absorption, and we also show a photoresponse enhancement factor of 4.5 at 639 nm compared to a flat chip. Photoresponse is also shown to increase with decreasing metal thickness down to 13 nm. Applications of our results could lead to low-cost and robust photoelectrochemical and thermo-photovoltaic devices.
Keywords :
"Wavelength measurement","Photonics","Gold","Noise measurement","Absorption","Integrated optics","Optical imaging"
Publisher :
ieee
Conference_Titel :
Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd
Type :
conf
DOI :
10.1109/PVSC.2015.7356229
Filename :
7356229
Link To Document :
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