Photonics

This innovative cavity-enhanced laser heating (CELAH) system delivers unparalleled efficiency for reflective samples in ultra-high vacuum (UHV) environments. Unlike traditional methods, such as resistive or electron bombardment techniques, this technology employs a laser-based system compatible with a wide range of wavelengths and materials, from highly reflective materials to semiconductors. At its core is a hemispherical optical cavity created by a polished concave reflector and the sample, ...

The invention relates to a new method for an improved production of random numbers and verification of their randomness. In order to do so, it uses the quantum mechanical properties of microscopic particles and structures. A number sequence is generated by means of a repetitive quantum mechanical random process. The measurement of this process is performed by a homodyndetection of an optical input signal, where the signal interferes with a local oscillator, e.g. a laser, at a central beam splitter ...

The invention relates to a new concept for a high efficiency light antenna, namely the Truncated Omnidirectional Reflector (TOR). It is well suited for obtaining directional emission and efficient fiber coupling from various types of light sources like single photon emitters.
Especially in the fast-growing field of quantum technologies efficient collectors for solid-state single photon emitters are needed. Achieving collector efficiencies of more than 95% into the fundamental Gaussian mode, ...

The invention relates to a new device for precise large-angle beam steering at an extended wavelength range. It is based on an electrically-controlled metasurface and allows for the implementation in advanced LIDAR systems.

Metasurfaces are used to change properties of light and can therefore be used to steer an incoming beam. However, common devices are lacking spatial resolution and are thus limited to small angles. Furthermore, state-of-the-art metasurfaces for respective applications ...