Fabrication of materials with predefined physical properties is in demand in many areas of physics. In this work, researchers from the US have explored the multi-dimensional fabrication space and produced thin films of Aluminium doped ZnO with electric properties that were not achievable before. This transparent conducting oxide has a range of applications in many current devices and the list of these applications will be further extended by the use of the so-called near-zero index regimes for making functional metasurfaces. By modifying the fabrication process (atomic layer deposition) and adjusting some of the parameters to the values that are typically not accessible, they achieved record high doping efficiencies with more unified distribution of dopants. This allows to substantially increase the frequency range in which the materials can access zero refractive index. The proposed strategies for improved fabrication can potentially be useful in processing of other materials.

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 Reader Comments

• Nathaniel K.

  01/25/2021 11:01 AM

  We are excited to have our article selected for a spotlight in OSA's Optical Materials Express Journal! Epsilon-near-zero and near-zero-index materials are playing an important role in developing new nonlinear and dynamic optical devices and we hope this work will aid the community with new ways of integrating high-quality films into various devices and systems.

  In addition to the paper, we have recently made the raw data sets from the figures in the paper available. You can find them here: https://www.doi.org/10.13140/RG.2.2.16356.81286.

  If you have any questions about this work we'd love to hear from you! You can post comments here or reach out to me via email at nkinsey@vcu.edu.

  We hope you find this work useful for your research efforts! You can find out more about of work on ur website at https://rampages.us/klabphotonics/

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