Freiburg 2019 – wissenschaftliches Programm
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FM: Fall Meeting
FM 31: Secure Communication & Computation II
FM 31.3: Group Report
Dienstag, 24. September 2019, 14:45–15:15, 1009
Telecom wavelength InP-based photonic structures for quantum communication — Marek Burakowski1, Wojciech Rudno-Rudziński1, M. Mikulicz1, P. Wyborski1, Anna Musiał1, Grzegorz Sek1, Andrei Kors2, Johann Peter Reithmaier2, and •Mohamed Benyoucef2 — 1Wrocław University of Science and Technology, Wrocław, Poland — 2University of Kassel, Kassel, Germany
Solid state semiconductor quantum dots (QDs) emitting at optical fiber communication wavelengths, particularly in the telecom C-band, which offers the lowest attenuation losses in silica fibers have a lot of potential as a single photon source platform due to their several advantages of favorable manipulation and integration with various photonic elements.
In this talk, I will report our recent progress in telecom wavelengths single InP-based photonic structures. For enhanced photon extraction efficiency, the QDs are grown on top of a distributed Bragg reflector. Fabrication of symmetric QDs with low density is obtained by careful control of the QD growth using a special growth technique and temperature processing. Low-temperature single-dot spectroscopy exhibits high-intensity sharp excitonic emission lines with vanishing fine-structure splitting, and relatively small linewidths (< 40 µeV) indicate low spectral diffusion. Triggered ultra-pure single-photon emission with measured g(2)(0) values of ≈ 0 in both C- and L- telecom bands is demonstrated, showing an ideal single-photon source.