Three-photon excitation of quantum two-level systems
- URL: http://arxiv.org/abs/2202.02034v2
- Date: Tue, 31 Jan 2023 10:43:02 GMT
- Title: Three-photon excitation of quantum two-level systems
- Authors: Viviana Villafa\~ne, Bianca Scaparra, Manuel Rieger, Stefan Appel,
Rahul Trivedi, Tongtong Zhu, John Jarman, Rachel A. Oliver, Robert A. Taylor,
Jonathan J. Finley, Kai Mueller
- Abstract summary: We demonstrate that semiconductor quantum dots can be excited efficiently in a resonant three-photon process.
Time-dependent Floquet theory is used to quantify the strength of the multi-photon processes.
We exploit this technique to probe intrinsic properties of InGaN quantum dots.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We demonstrate that semiconductor quantum dots can be excited efficiently in
a resonant three-photon process, whilst resonant two-photon excitation is
highly suppressed. Time-dependent Floquet theory is used to quantify the
strength of the multi-photon processes and model the experimental results. The
efficiency of these transitions can be drawn directly from parity
considerations in the electron and hole wavefunctions in semiconductor quantum
dots. Finally, we exploit this technique to probe intrinsic properties of InGaN
quantum dots. In contrast to non-resonant excitation, slow relaxation of charge
carriers is avoided which allows us to measure directly the radiative lifetime
of the lowest energy exciton states. Since the emission energy is detuned far
from the resonant driving laser field, polarization filtering is not required
and emission with a greater degree of linear polarization is observed compared
to non-resonant excitation.
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