Regensburg 2019 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 35: HL Poster II
HL 35.57: Poster
Wednesday, April 3, 2019, 17:30–20:00, Poster E
Blue InGaAs-VECSELs for Rydberg atom spectroscopy — •Ana Ćutuk1, Marija Ćurčić2, Marius Plach3, Richard Hermann3, Marius Großmann1, Roman Bek1, Robert Löw3, Harald Kübler3, Michael Jetter1, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart — 2Photonics Center, Institute of Physics, Belgrade, Serbia — 35. Physikalisches Institut and Center for Integrated Quantum Science and Technology IQST, Universität Stuttgart
The Rydberg state of atoms is very attractive for applications in quantum information due to its large dipole moment, lifetime and polarizability. For the excitation of the Rydberg states in rubidium and potassium, laser emission in the blue spectral range is necessary. The vertical external-cavity surface-emitting laser (VECSEL) turns out to be an excellent candidate due to its wavelength versatility and high output power combined with a near diffraction-limited beam profile and the flexibility to add optical components inside the cavity. Our focus is on the development of InGaAs-based VECSELs with the fundamental wavelength in the near-infrared spectral range. By inserting a BBO crystal in a v-shaped cavity, second harmonic generation at around 475 nm and 455 nm can be achieved. Further improvements will be made on reducing the laser linewidth to achieve single mode operation and with analog stabilization according to the Pound-Drever-Hall technique.