Erlangen 2022 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 41: Nano-Optics
Q 41.2: Poster
Mittwoch, 16. März 2022, 16:30–18:30, P
Fabrication of photonic crystal cavities towards a coherent spin-photon interface with color centers in SiC — •Jonathan Körber1, Marcel Krumrein1, Rainer Stöhr1, Jonah Heiler1, Vadim Vorobyov1, Raphael Nold1, Lukas Niechziol1, Lin Jin2, Patrick Berwian3, Wolfram Pernice2, Jörg Wrachtrup1, and Florian Kaiser1 — 13rd Institute of Physics, IQST and Research Centre SCoPE, University of Stuttgart, Germany — 2Institute of Physics, AG Pernice, University of Münster, Germany — 3Fraunhofer Institute for Integrated Systems and Device Technology IISB, Erlangen, Germany
Color centers in SiC promise applications in the fields of distributed quantum computing and quantum sensing. However, as a consequence of the high refractive index, SiC-based color centers in the bulk show small photon count rates due to total internal reflection. Moreover, Debye-Waller factors of 8 (9)% [1] for the V1 (V2) center in SiC further lower the rate of resonantly emitted photons. To overcome these limitations we fabricate photonic crystal cavities in SiC, based on the approach from [2] in diamond, aiming at a Purcell enhancement of 10-100 and near-deterministic fiber coupling. Here, we report on the most recent updates of our work based on rectangular cross-section photonic structures that are patterned by electron-beam lithography and transferred into the SiC by reactive-ion etching. Furthermore, we show perspectives for color center integration.
[1]: Udvarhelyi, P. et al., Phys. Rev. Applied 13:054017 (2020)
[2]: Quan, Q. et al., Appl. Phys. Lett. 96:203102 (2010)