TY - JOUR
T1 - Broadband Nonlinear Optical Response of Indium–Zirconium Oxide in the Epsilon‐Near‐Zero Region
AU - Ghobadi, Hosein
AU - Smirnov, Yury
AU - Korterik, Jeroen P.
AU - Alvarez‐Chavez, Jose A.
AU - Offerhaus, Herman L.
AU - Morales‐Masis, Monica
AU - De Leon, Israel
N1 - Funding Information:
H.G. is grateful to CONACyT for the financial support under the scholarship 971961. H.G. also acknowledges the support from the University of Twente, the Netherlands for funding this research. I.D.L. acknowledges the support of CONACyT (Ciencia Básica) under grant number 286150. Y.S and M.M.M. acknowledge the support from Dr. Max Doebeli at ETH Zürich for the RBS measurements on the IZrO films.
Publisher Copyright:
© 2022 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH.
PY - 2022/12/19
Y1 - 2022/12/19
N2 - Transparent conducting oxides (TCOs) exhibit interesting linear and nonlinear optical properties in their epsilon-near-zero (ENZ) region. Studies so far have mostly focused on exploring the optical response of a limited number of these materials. It is therefore important to investigate new TCOs that could offer improved ENZ properties. This work reports for the first time measurements of the linear and nonlinear optical responses of polycrystalline indium-zirconium oxide (IZrO) in the ENZ spectral region. The fabricated IZrO films exhibit high optical mobility (>60 cm2 V-1 s-1) and a broadening of the ENZ region due to a graded permittivity along the thickness, as suggested by spectroscopic ellipsometry. This in turn leads to a broadband nonlinear response with a full-width-at-half-maximum bandwidth as large as ≈260 nm, covering the entire spectral range of the C, L, and U optical telecommunication bands. This work introduces IZrO as a new, promising TCO that could be used for ultrafast and broadband modulation of light in the telecommunication region of the spectrum.
AB - Transparent conducting oxides (TCOs) exhibit interesting linear and nonlinear optical properties in their epsilon-near-zero (ENZ) region. Studies so far have mostly focused on exploring the optical response of a limited number of these materials. It is therefore important to investigate new TCOs that could offer improved ENZ properties. This work reports for the first time measurements of the linear and nonlinear optical responses of polycrystalline indium-zirconium oxide (IZrO) in the ENZ spectral region. The fabricated IZrO films exhibit high optical mobility (>60 cm2 V-1 s-1) and a broadening of the ENZ region due to a graded permittivity along the thickness, as suggested by spectroscopic ellipsometry. This in turn leads to a broadband nonlinear response with a full-width-at-half-maximum bandwidth as large as ≈260 nm, covering the entire spectral range of the C, L, and U optical telecommunication bands. This work introduces IZrO as a new, promising TCO that could be used for ultrafast and broadband modulation of light in the telecommunication region of the spectrum.
KW - Broadband nonlinear response
KW - Epsilon-near-zero
KW - Graded permittivity
KW - Indium oxide
KW - Indium-zirconium oxide
KW - Transparent conducting oxides
KW - UT-Hybrid-D
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=utwente-ris&SrcAuth=WosAPI&KeyUT=WOS:000866861200001&DestLinkType=FullRecord&DestApp=WOS
U2 - 10.1002/adom.202201748
DO - 10.1002/adom.202201748
M3 - Article
SN - 2195-1071
VL - 10
JO - Advanced Optical Materials
JF - Advanced Optical Materials
IS - 24
M1 - 2201748
ER -