The interplay between bandgap renormalization and Burstein-Moss effect for multilayered Al:ZnO/ZnO metamaterial

Bethany Campbell; Priscilla Kelly; Antonio Talamantes; Lyuba Kuznetsova

doi:10.1117/12.2568264

20 August 2020 The interplay between bandgap renormalization and Burstein-Moss effect for multilayered Al:ZnO/ZnO metamaterial

Bethany Campbell, Priscilla Kelly, Antonio Talamantes, Lyuba Kuznetsova

Author Affiliations +

Proceedings Volume 11460, Metamaterials, Metadevices, and Metasystems 2020; 114600H (2020) https://doi.org/10.1117/12.2568264
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

Multilayered Al:ZnO/ZnO metamaterial, a material that exhibits unique optical properties such as hyperbolic dispersion, attracted a high research interest due to its low optical loss and high conductivity. Combination of the optical gain and strong anisotropy for the Al:ZnO/ZnO metamaterial provide novel opportunities to control spontaneous emission. High doping concentrations (10²⁰- 10²¹ cm^-3 ) for Al:ZnO/ZnO require the inclusion the effect of the band filling. While ZnO has a large bandgap of ~3.3 eV, it has been suggested that in Al:ZnO the Burstein-Moss effect results in an increase in bandgap and thus a decrease in emitted wavelength, which may partially explain the suppression of visible photoluminescence and increase in ultraviolet photoluminescence observed in highly doped Al:ZnO. Here, we investigated the interplay between bandgap renormalization and band filling (Burstein-Moss effect). The results of our calculations show that the energy shift due to the Burstein-Moss effect (blue-shift) and bandgap renormalization (redshift) strongly depends on carrier concentration in multilayered Al:ZnO/ZnO. We found that the energy blue-shift due to BursteinMoss compensates the red-shift from the bandgap renormalization when a carrier concentration reaches 10²⁰ cm^-3 .

Conference Presentation

Citation Download Citation

Bethany Campbell, Priscilla Kelly, Antonio Talamantes, and Lyuba Kuznetsova "The interplay between bandgap renormalization and Burstein-Moss effect for multilayered Al:ZnO/ZnO metamaterial", Proc. SPIE 11460, Metamaterials, Metadevices, and Metasystems 2020, 114600H (20 August 2020); https://doi.org/10.1117/12.2568264

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