Dr. Stephan Dürr
Stephan Dürr
Telefon: +49 89 3 29 05 - 291
Raum: A 2.22
Prof. Dr. Thomas Udem
Thomas Udem
Telefon: +49 89 3 29 05 - 282 // -257
Raum: D 0.21 // D 0.39

kommende Kolloquien



Die Gastvorträge im Rahmen des MPQ-Kolloquiums finden von April bis Juli sowie von Oktober bis Januar jeweils dienstags um 14:30 Uhr statt. Verantaltungsort ist der Herbert-Walther-Hörsaal im Foyer des Max-Planck-Instituts für Quantenoptik.

Ansprechpartner für die wissenschaftliche Organisation:

Dr. Stephan Dürr und Dr. Thomas Udem

Wenn Sie einen Vortrag im Livestream verfolgen möchten, ist es nötig, dass Sie sich in eine entsprechende Mailing Liste eintragen. Daraufhin erhalten Sie Instruktionen zum Empfang des Livestreams.


Non-perturbative Cavity QED

Non-perturbative Cavity QED (Prof. Peter Rabl)

In quantum optical systems the coupling between a single dipole and a single cavity mode is always much smaller than the absolute energy scales involved, which allows us to understand and model light-matter interactions in terms of well-defined atomic and photonic excitations. With recent advances in the field of circuit QED it is now possible to go beyond this well-established paradigm and enter a fully non-perturbative regime, where the coupling between a single artificial atom (e.g. a superconducting qubit) and a microwave photon exceeds the energy of the photon itself. Such conditions can be associated with an effective finestructure constant of order unity and in this talk I will give a brief introduction about the basics models and novel effects that govern the physics of light-matter interactions in this previously inaccessible regime. [mehr]

Optimized quantum photonics

Optimized quantum photonics (Prof. Jelena Vuckovic)

At the core of most quantum technologies, including quantum networks and quantum simulators, is the development of homogeneous, long lived qubits with excellent optical interfaces, and the development of high efficiency and robust optical interconnects for such qubits. To achieve this goal, we have been studying color centers in diamond (SiV, SnV) and silicon carbide (VSi in 4H SiC), in combination with novel fabrication techniques, and relying on the powerful and fast photonics inverse design approach that we have developed. [mehr]

SMT: Printing really small, really fast … and what to do when you are at the end of your rope

SMT: Printing really small, really fast … … and what to do when you are at the end of your rope (Dr. Andreas Dorsel)

This talk is intended to provide you with a solid notion of what can be achieved in nano-lithography today, what the present technical limitations are and what we consider at present fundamental boundaries of what may be possible in the future. Carl Zeiss SMT has been active in this field for more than 50 years and its history hence shows some of the technological milestones from the early beginnings of integrated circuits to present-day extreme integration allowing qualitatively new applications of micro- or rather nano-electronics. [mehr]

χ(2) Nanomaterials for Nonlinear Integrated Photonic Devices

χ(2) Nanomaterials for Nonlinear Integrated Photonic Devices (Prof. Rachel Grange)

Nonlinear optics is present in our daily life with many applications, e.g. light sources for microsurgery or green laser pointer. All of them use bulk materials such as glass fibres or crystals. Generating nonlinear effects from materials at the nanoscale can expand the applications to biology as imaging markers or sensors, and to optoelectronic integrated devices. However, nonlinear signals scale with the volume of a material. Therefore, finding nanostructured materials with high nonlinearities to avoid using high power and large interaction length is challenging. Here I will show several strategies to maximize nonlinear optical signals in nano-oxides with noncentrosymmetric crystalline structure and semiconductors. I will demonstrate how we enhance second-harmonic generation (SHG) by using the scattering properties of individual barium titanate (BaTiO3) nanoparticles1, and AlGaAs standing nanodisks2. Our results suggest that a strong increase of the SHG signal can be obtained without using plasmonics or hybrid nanostructures3 [mehr]

Quantum fluids of light in semiconductor lattices

Quantum fluids of light in semiconductor lattices (Prof. Jacqueline Bloch)

When confining photons in semiconductor lattices, it is possible to deeply modify their physical properties. Photons can behave as finite or even infinite mass particles, photons inherit topological properties and propagate along edge states without back scattering, photons can become superfluid and behave as interacting particles. These are just a few examples of properties that can be imprinted into fluids of light in semiconductor lattices. Such manipulation of light presents not only potential for applications in photonics, but is a great promise for fundamental studies. [mehr]

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