HYBRID: Detecting light at the single photon level: quantum devices and applications
Berliner Physikalisches Kolloquium
- Date:
- Th, 15.05.2025 18:30 – Th, 15.05.2025 20:00
- Speaker:
- Prof. Dr. Val Zwiller, Royal Institute of Technology Stockholm (Schweden) und Single Quantum BV Delft (Niederlande)
- Address:
- Physikalisch-Technische Bundesanstalt, Anna-von-Helmholtz-Bau, Berlin-Charlottenburg
Abbestraße 2-12, 10587 Berlin, Germany
Besuchereingang: Marchstraße, Ecke Fraunhoferstraße
- Language:
- English
- Event partner:
- Brandenburgische Technische Universität Cottbus-Senftenberg, Freie Universität Berlin , Humboldt-Universität zu Berlin , Technische Universität Berlin , Universität Potsdam , Wilhelm und Else Heraeus-Stiftung , Physikalische Gesellschaft zu Berlin e. V.
- Contact person:
- Andreas Böttcher,
Description
Dieser Vortrag wird in Präsenz im Magnus-Haus gehalten und ist gleichzeitig online zu verfolgen. Die Veranstaltung kann auch ohne Anmeldung besucht werden. Die Anmeldung hilft uns lediglich, die vorzuhaltenden Kapazitäten besser zu planen.
zum Inhalt:
The ability to detect single photons is crucial for quantum optics as well as for a wide number of applications. Several technologies have been developed for efficient single photon detection in the visible and near infrared. The invention of the superconducting nanowire single photon detector in 2001 enabled the development of a new class of detectors that can operate close to physical limits. Different aspects will be discussed including wavelength detection range, time resolution, dark counts, saturation rates and photon number resolution along with various applications such as Lidar, quantum communication, deep space communication, microscopy and bio-medical measurements. Multipixel single photon detectors based on superconducting nanowires will also be discussed, including a quantum spectrometer that is based on an array of high-performance single photon By time stamping single photon detection events at the output of a spectrometer we generate data that can yield spectra as well as photon correlations such as g(2), g(3) to g (n) as well as cross correlations among different spectral lines, under pulsed excitation, transition lifetimes can also be extracted. This instrument therefore replaces a spectrometer, a streak camera, a Hanbury-Brown Twiss interferometer and operates with far higher signal to noise ratio than is possible with existing detectors that are commonly used in the infrared.
Moderation: Stephan Reitzenstein (TU Berlin)
Eine gemeinsame Veranstaltung der Physikalischen Gesellschaft zu Berlin e.V., der Brandenburgischen Technischen Universität Cottbus-Senftenberg, der Freien Universität Berlin, der Humboldt-Universität zu Berlin, der Technischen Universität Berlin und der Universität Potsdam ‒ gefördert durch die Wilhelm und Else Heraeus-Stiftung