Journal
PHYSICAL REVIEW B
Volume 96, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.96.121202
Keywords
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Funding
- DFG [Sfb 951]
- Einstein Foundation Berlin (ActiPlAnt)
- CNPq Brasil (science without borders program)
- Australian Research Council [DE130100592]
- Asian Office of Aerospace Research and Development [FA2386-15-1-4044]
- Alexander von Humboldt Foundation
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Quantum emitters in hexagonal boron nitride (hBN) have recently emerged as promising bright single photon sources. In this Rapid Communication we investigate in detail their optical properties at cryogenic temperatures. In particular, we perform temperature-resolved photoluminescence studies and measure photon coherence times from the hBN emitters. The obtained value of 81( 1) ps translates to a width of similar to 6.5 GHz which is higher than the Fourier transform limited value of similar to 32 MHz. To account for the photodynamics of the emitter, we perform ultrafast spectral diffusion measurements that partially account for the coherence times. Our results provide important insight into the relaxation processes in quantum emitters in hBN which is mandatory to evaluate their applicability for quantum information processing.
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