Exceptionally strong coupling of defect emission in hexagonal boron
nitride to stacking sequences
- URL: http://arxiv.org/abs/2307.10401v1
- Date: Wed, 19 Jul 2023 18:17:20 GMT
- Title: Exceptionally strong coupling of defect emission in hexagonal boron
nitride to stacking sequences
- Authors: Song Li, Anton Pershin, Pei Li and Adam Gali
- Abstract summary: We unveil an application of van der Waals technology in modulating their spectral shapes and brightness by carefully controlling the stacking sequences and polytypes.
This work paves the way for enhancing defect identification and facilitating the engineering of highly efficient single photon sources and qubits.
- Score: 7.236658916062811
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Van der Waals structures present a unique opportunity for tailoring material
interfaces and integrating photonic functionalities. By precisely manipulating
the twist angle and stacking sequences, it is possible to elegantly tune and
functionalize the electronic and optical properties of layered van der Waals
structures. Among these materials, two-dimensional hexagonal boron nitride
(hBN) stands out for its remarkable optical properties and wide band gap,
making it a promising host for solid state single photon emitters at room
temperature. Previous investigations have demonstrated the observation of
bright single photon emission in hBN across a wide range of wavelengths. In
this study, we unveil an application of van der Waals technology in modulating
their spectral shapes and brightness by carefully controlling the stacking
sequences and polytypes. Our theoretical analysis reveals remarkably large
variations in the Huang-Rhys factors-an indicator of the interaction between a
defect and its surrounding lattice-reaching up to a factor of 3.3 for the same
defect in different stackings. We provide insights into the underlying
mechanism behind these variations, shedding light on the design principles
necessary to achieve rational and precise control of defect emission. This work
paves the way for enhancing defect identification and facilitating the
engineering of highly efficient single photon sources and qubits using van der
Waals materials.
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