Dresden 2017 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 4: Focus Session: Two-dimensional materials I (jointly with HL/TT)
DS 4.2: Vortrag
Montag, 20. März 2017, 10:00–10:15, POT 81
Quantum emission from low dimensional materials — •Nathan Chejanovsky1,2, Youngwook Kim2, Andrea Zappe1, Rainer Stöhr1, Felipe Favaro de Oliveira1, Durga Dasari1,2, Amit Finkler1, Jurgen H. Smet2, and Jörg Wrachtrup1,2 — 13rd Physics Institute and Research Center SCoPE, University of Stuttgart, 70569 Stuttgart, Germany — 2Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany
Quantum emitters (QEs) in semi-conductors are at the forefront of optical research. 3D solid state systems [1] and quantum dots [2] are known sources of QEs. Nevertheless, quantum dots have constraints on temperature operation, broad linewidths and emission intermittency rendering these systems problematic. 3D systems suffer from light scattering and are difficult to process into tailored nano-structures.
Low dimensional wide band-gap materials (e.g. Van der Waals crystals) open possibilities for circumventing these obstacles, accessing intra-band gap states using sub-band gap excitation. Fulfilling this criteria, hexagonal boron nitride (h-BN), hosts room temperature QEs. [3] I summarize developments in this field and present results from our recent publication: [3] connecting structural features and QE location, generation of QEs using chemical etching/ion irradiation and analyzing their spectral features and photodynamics.
[1] Jelezko, F. et al. phys. stat. sol. (a) 2006, 203(13), 3207-3225 [2] Lodahl, P. et al. Reviews of Modern Physics 2015, 87 (2), 347-400 [3] Chejanovsky, N. et al. Nano letters 2016, 16, 7037-7045