Tailoring epsilon-near-zero wavelength and nonlinear absorption properties of CdO thin films by Mo doping

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Yi Wu
  • Ying Wang
  • Mengxia Wang
  • Hao Ma
  • Hang Jiang
  • Jianke Yao
  • Yuanan Zhao
  • Jianda Shao

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number011104
Journal / PublicationApplied Physics Letters
Volume125
Issue number1
Online published2 Jul 2024
Publication statusPublished - Jul 2024

Abstract

Cadmium oxide (CdO) has recently attracted attention as a material with controllable properties tailored for optoelectronic and nanophotonic devices due to its superior mobility. However, its potential application in near-infrared (NIR) remains to be explored. In this work, we demonstrate that the epsilon-near-zero (ENZ) wavelength and nonlinear optical properties of CdO films can be effectively tuned by Mo doping. The results show that Mo doping increases the electron concentration as well as improve the crystalline quality of CdO. With increasing Mo doping, we achieve blueshifts of the ENZ wavelength from 2.89 to 1.56 μm. The nonlinear absorption (NLA) behavior at 1550 nm changes from reverse saturable absorption to saturable absorption with increasing Mo content. Moreover, significant improvement in NLA performance with nonlinear absorption coefficient β = −72 cm/GW is observed at the highest doping content. Our work shows that doped CdO films with tunable optoelectrical and nonlinear optical properties can be an ideal candidate for optoelectronic and nanophotonic application in the NIR region. © 2024 Author(s). Published under an exclusive license by AIP Publishing

Citation Format(s)

Tailoring epsilon-near-zero wavelength and nonlinear absorption properties of CdO thin films by Mo doping. / Wu, Yi; Wang, Ying; Wang, Mengxia et al.
In: Applied Physics Letters, Vol. 125, No. 1, 011104, 07.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review