Photo-acoustic spectroscopy revealing resonant absorption of self-assembled GaAs-based nanowires

Abstract III–V semiconductors nanowires (NW) have recently attracted a significant interest for their potential application in the development of high efficiency, highly-integrated photonic devices and in particular for the possibility to integrate direct bandgap materials with silicon-based devices...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Grigore Leahu, Emilija Petronijevic, Alessandro Belardini, Marco Centini, Roberto Li Voti, Teemu Hakkarainen, Eero Koivusalo, Mircea Guina, Concita Sibilia
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/840af710bd904be3b269dffad5f0adb5
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:840af710bd904be3b269dffad5f0adb5
record_format	dspace
spelling	oai:doaj.org-article:840af710bd904be3b269dffad5f0adb52021-12-02T15:05:31ZPhoto-acoustic spectroscopy revealing resonant absorption of self-assembled GaAs-based nanowires10.1038/s41598-017-02839-12045-2322https://doaj.org/article/840af710bd904be3b269dffad5f0adb52017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02839-1https://doaj.org/toc/2045-2322Abstract III–V semiconductors nanowires (NW) have recently attracted a significant interest for their potential application in the development of high efficiency, highly-integrated photonic devices and in particular for the possibility to integrate direct bandgap materials with silicon-based devices. Here we report the absorbance properties of GaAs-AlGaAs-GaAs core-shell-supershell NWs using photo-acoustic spectroscopy (PAS) measurements in the spectral range from 300 nm to 1100 nm wavelengths. The NWs were fabricated by self-catalyzed growth on Si substrates and their dimensions (length ~5 μm, diameter ~140–150 nm) allow for the coupling of the incident light to the guided modes in near-infrared (IR) part of the spectrum. This coupling results in resonant absorption peaks in the visible and near IR clearly evidenced by PAS. The analysis reveal broadening of the resonant absorption peaks arising from the NW size distribution and the interaction with other NWs. The results show that the PAS technique, directly providing scattering independent absorption spectra, is a very useful tool for the characterization and investigation of vertical NWs as well as for the design of NW ensembles for photonic applications, such as Si-integrated light sources, solar cells, and wavelength dependent photodetectors.Grigore LeahuEmilija PetronijevicAlessandro BelardiniMarco CentiniRoberto Li VotiTeemu HakkarainenEero KoivusaloMircea GuinaConcita SibiliaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Grigore Leahu Emilija Petronijevic Alessandro Belardini Marco Centini Roberto Li Voti Teemu Hakkarainen Eero Koivusalo Mircea Guina Concita Sibilia Photo-acoustic spectroscopy revealing resonant absorption of self-assembled GaAs-based nanowires
description	Abstract III–V semiconductors nanowires (NW) have recently attracted a significant interest for their potential application in the development of high efficiency, highly-integrated photonic devices and in particular for the possibility to integrate direct bandgap materials with silicon-based devices. Here we report the absorbance properties of GaAs-AlGaAs-GaAs core-shell-supershell NWs using photo-acoustic spectroscopy (PAS) measurements in the spectral range from 300 nm to 1100 nm wavelengths. The NWs were fabricated by self-catalyzed growth on Si substrates and their dimensions (length ~5 μm, diameter ~140–150 nm) allow for the coupling of the incident light to the guided modes in near-infrared (IR) part of the spectrum. This coupling results in resonant absorption peaks in the visible and near IR clearly evidenced by PAS. The analysis reveal broadening of the resonant absorption peaks arising from the NW size distribution and the interaction with other NWs. The results show that the PAS technique, directly providing scattering independent absorption spectra, is a very useful tool for the characterization and investigation of vertical NWs as well as for the design of NW ensembles for photonic applications, such as Si-integrated light sources, solar cells, and wavelength dependent photodetectors.
format	article
author	Grigore Leahu Emilija Petronijevic Alessandro Belardini Marco Centini Roberto Li Voti Teemu Hakkarainen Eero Koivusalo Mircea Guina Concita Sibilia
author_facet	Grigore Leahu Emilija Petronijevic Alessandro Belardini Marco Centini Roberto Li Voti Teemu Hakkarainen Eero Koivusalo Mircea Guina Concita Sibilia
author_sort	Grigore Leahu
title	Photo-acoustic spectroscopy revealing resonant absorption of self-assembled GaAs-based nanowires
title_short	Photo-acoustic spectroscopy revealing resonant absorption of self-assembled GaAs-based nanowires
title_full	Photo-acoustic spectroscopy revealing resonant absorption of self-assembled GaAs-based nanowires
title_fullStr	Photo-acoustic spectroscopy revealing resonant absorption of self-assembled GaAs-based nanowires
title_full_unstemmed	Photo-acoustic spectroscopy revealing resonant absorption of self-assembled GaAs-based nanowires
title_sort	photo-acoustic spectroscopy revealing resonant absorption of self-assembled gaas-based nanowires
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/840af710bd904be3b269dffad5f0adb5
work_keys_str_mv	AT grigoreleahu photoacousticspectroscopyrevealingresonantabsorptionofselfassembledgaasbasednanowires AT emilijapetronijevic photoacousticspectroscopyrevealingresonantabsorptionofselfassembledgaasbasednanowires AT alessandrobelardini photoacousticspectroscopyrevealingresonantabsorptionofselfassembledgaasbasednanowires AT marcocentini photoacousticspectroscopyrevealingresonantabsorptionofselfassembledgaasbasednanowires AT robertolivoti photoacousticspectroscopyrevealingresonantabsorptionofselfassembledgaasbasednanowires AT teemuhakkarainen photoacousticspectroscopyrevealingresonantabsorptionofselfassembledgaasbasednanowires AT eerokoivusalo photoacousticspectroscopyrevealingresonantabsorptionofselfassembledgaasbasednanowires AT mirceaguina photoacousticspectroscopyrevealingresonantabsorptionofselfassembledgaasbasednanowires AT concitasibilia photoacousticspectroscopyrevealingresonantabsorptionofselfassembledgaasbasednanowires
_version_	1718388776655388672

Photo-acoustic spectroscopy revealing resonant absorption of self-assembled GaAs-based nanowires

Ejemplares similares