SAMOP 2023 – scientific programme
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QI: Fachverband Quanteninformation
QI 31: Single Quantum Emitters (joint session Q/QI)
QI 31.4: Talk
Thursday, March 9, 2023, 15:30–15:45, E214
Fingerprinting color centers in hexagonal boron nitride — •Chanaprom Cholsuk1, Sujin Suwanna2, and Tobias Vogl1 — 1Abbe Center of Photonics, Institute of Applied Physics, Friedrich-Schiller-University, Albert-Einstein-Straße 15, 07745 Jena — 2Optical and Quantum Physics Laboratory, Department of Physics, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
Optical quantum technologies promise to revolutionize today's information processing and sensing. Crucial to many quantum applications are efficient sources of pure single photons. For a quantum emitter to be used in such application, or for coupling between different quantum systems, the optical emission wavelength of the quantum emitter needs to be tailored. Here, we use density functional theory (DFT) to calculate and manipulate the transition energy of fluorescent defects in the two-dimensional hexagonal boron nitride.
Our calculations feature the HSE06 functional which accurately predicts the electronic band structures of 267 different defects. Moreover, using strain-tuning we can tailor the optical transition energies of suitable quantum emitters to precisely match those of quantum technology applications. The complete photophysical properties of the emitters including spectrum profile, Huang-Rhys factor, radiative and non-radiative lifetime, quantum efficiency, and excitation and emission dipoles are also revealed. We thereby not only have a promising pathway for tailoring quantum emitters that can couple to other solid-state qubit systems but also get access to the complete fingerprint of the emitters for identifying the defect structure of the emitters.