Diode Lasers, Frequency Combs and Electronics:

Rydberg atoms are atoms that are highly excited e.g. by laser irradiation, collisions with electrons and are also observed in outer space. Read more.

Usually, one electron is excited into a state with very high principal quantum number, e.g. n=100 or even much higher. Since the radius (the size) of atom scales with the square of n, Rydberg atoms can become very large, up to the mm scale. They are very sensitive to electric fields and can hence be used to detect the latter. Rydberg atoms were also used to demonstrate and test quantum optics or quantum physics phenomena, like for “Schrödinger cats” or tests of Bells inequality. Being placed within a small electric field, Rydberg atoms can be polarized and show very high electric dipole moments. These high dipole moments can be used to investigate dipole-dipole interaction, e.g. in quantum gases. Based on the so-called dipole blockade, one can also realize single photon sources using narrow linewidth lasers to excite exactly one atom to a Rydberg state.

Toptica offer a range of technology solutions for investigation and research into Rydberg atoms, including suitable diode laser systems, frequency combs and associated electronics. They have created a dedicated "Solutions for Rydberg Atoms" catalogue with full details of relevant systems. The catalogue may be downloaded here.

This range is part of Toptica's broader portfolio of lasers and other products for Fundamental Quantum Technology. In these fields quantum physics, quantum optics, atom optics, photonics, statistical physics and related fields are investigated in order to understand the basics of quantum technology. Whenever a laser is required – pulsed or cw, tunable or actively frequency stabilized – a frequency comb or even a complete solution combining many lasers and photonicals, TOPTICA is the ideal partner.

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Image: Representation of interaction between two Rydberg atoms in a dynamic array of optical traps for qubits.

Lasers & other Sources