Journal
PHYSICAL REVIEW B
Volume 97, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.97.220302
Keywords
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Funding
- NTU
- A*Star SERC Public Sector Funding [122-PSF-0011]
- Ministry of Education Academic Research Fund [MOE2014-T2-2-052, RG105/17]
- Nanyang Assistant Professorship
- DFG fellowship [UL 474/1-1]
- MOST [2016YFA0300902]
- NSFC [11774396]
- National Research Development and Innovation Office of Hungary (NKFIH) within the Quantum Technology National Excellence Program [2017-1.2.1-NKP-30-2017-00001]
- QuantERA Q-Magine Project [127889]
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We employ a combination of spectrally resolved optical pump-probe spectroscopy and excited-state ab initio molecular dynamics (ESAIMD) simulations to study the ultrafast vibrational relaxation dynamics of the E-3 excited state of negatively charged nitrogen vacancy (NV-) defects. The experimental results reveal vibrational relaxation in the phonon sideband with a time constant of approximately 50 fs, in excellent agreement with the similar to 40-fs structural equilibration timescale predicted by ESAIMD simulations. The observed ultrafast vibrational energy relaxation implies that dynamical processes triggered by photoexcitation into the phonon sideband of the NV- center occur primarily in the lowest vibronic level of the E-3 state.
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