SKM 2021 – wissenschaftliches Programm

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SYPQ: Symposium The Rise of Photonic Quantum Technologies – Practical and Fundamental Aspects

SYPQ 1: Symposium: The Rise of Photonic Quantum Technologies – Practical and Fundamental Aspects

SYPQ 1.1: Hauptvortrag

Freitag, 1. Oktober 2021, 10:00–10:30, Audimax 2

Quantum dots operating at telecom wavelengths for photonic quantum technology — •Simone Luca Portalupi — IHFG-University of Stuttgart

In recent years, strong efforts have been made in order to realize out-of-the-lab demonstrations using quantum science. In particular, the broad range of photonic quantum technologies became highly attractive for the real world implementation of quantum information, quantum communication and quantum network tasks. Long distance realizations would benefit from the possibility of using photons as carriers of information. For these purposes, the use of quantum light in the so-called telecom O- (centred around 1310 nm) and C-band (centred around 1550 nm) would have the advantages of experiencing minimal photon wavepacket dispersion and absorption. Semiconductor quantum dots are considered one of the most appealing sources of quantum light, in particular the ones based on the GaAs material system. In this talk, we will discuss the techniques that can be employed to realize In(Ga)As/GaAs quantum dots emitting in the telecom O- and C-bands [1]. Furthermore, we will discuss advanced fabrication techniques [2] and optical resonators that can be employed to sensibly enhance the source brightness and performances, even operating at liquid nitrogen temperature [3].

[1] S. L. Portalupi, et al., Semicond. Sci. Technol. 34, 053001 (2019)

[2] M. Sartison, et al., Appl. Phys. Lett. 113, 032103 (2018)

[3] S. Kolatschek, et al., arXiv:2107.03316 (2021)