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Article Dans Une Revue Superlattices and Microstructures Année : 2019

Spontaneous emission of color centers at 4eV in hexagonal boron nitride under hydrostatic pressure

Kamil Koronski
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Agata Kaminska
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Nikolai D Zighadlo
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Résumé

The light emission properties of color centers emitting in 3.3–4 eV region are investigated for hydrostatic pressures ranging up to 5 GPa at liquid helium temperature. The light emission energy decreases with pressure less sensitively than the bandgap. This behavior at variance from the shift of the bandgap is typical of deep traps. Interestingly, hydrostatic pressure reveals the existence of levels that vary differently under pressure (smaller increase of the emission wavelength compared to the rest of the levels in this energy region or even decrease of it) with pressure. This discovery enriches the physics of the color centers operating in the UV in hBN.

Dates et versions

hal-02141847 , version 1 (28-05-2019)

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Kamil Koronski, Agata Kaminska, Nikolai D Zighadlo, Christine Elias, Guillaume Cassabois, et al.. Spontaneous emission of color centers at 4eV in hexagonal boron nitride under hydrostatic pressure. Superlattices and Microstructures, 2019, 131, pp.1. ⟨10.1016/j.spmi.2019.05.018⟩. ⟨hal-02141847⟩
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