122 citations · 1.1k across the 56 of their papers we have counts for
8 papers · 1 filter
Electric-field metrology of a terahertz frequency comb using Rydberg atoms
Wiktor Krokosz, Jan Nowosielski, Bartosz Kasza +4
Terahertz radiation finds an increasing number of applications, yet efficient generation and detection remain a challenge and an active area of research. In particular, the precise…
Superheterodyne Rydberg S-band receiver with a multi-tone local oscillator based on an atomic transition loop
Jan Nowosielski, Mateusz Mazelanik, Wojciech Wasilewski +1
Atomic-vapor sensors based on Rydberg atoms now face a transition towards practical applications, with several outstanding challenges. To achieve the best sensitivities, a superhet…
Super-resolution of ultrafast pulses via spectral inversion
Michał Lipka, Michał Parniak
The resolution limits of classical spectroscopy can be surpassed by quantum-inspired methods leveraging the information contained in the phase of the complex electromagnetic field.…
Ultrafast electro-optic Time-Frequency Fractional Fourier Imaging at the Single-Photon Level
Michał Lipka, Michał Parniak
The Fractional Fourier Transform (FRT) corresponds to an arbitrary-angle rotation in the phase space, e.g. the time-frequency (TF) space, and generalizes the fundamentally importan…
Microwave electrometry with multi-photon coherence in Rydberg atoms
Zheng Yin, Shengfang Zhao, Yuan He +4
A scheme for measurement of microwave (MW) electric field is proposed via multi-photon coherence in Rydberg atoms. It is based on the three-photon electromagnetically induced absor…
Variable electro-optic shearing interferometry for ultrafast single-photon-level pulse characterization
Stanisław Kurzyna, Marcin Jastrzębski, Nicolas Fabre +3
Despite the multitude of available methods, the characterisation of ultrafast pulses remains a challenging endeavour, especially at the single-photon level. We introduce a pulse ch…
High-frequency broadband laser phase noise cancellation using a delay line
Michał Parniak, Ivan Galinskiy, Timo Zwettler +1
Laser phase noise remains a limiting factor in many experimental settings, including metrology, time-keeping, as well as quantum optics. Hitherto this issue was addressed at low fr…
Phase matching alters spatial multiphoton processes in dense atomic ensembles
Adam Leszczyński, Michał Parniak, Wojciech Wasilewski
Multiphoton processes in dense atomic vapors such as four-wave mixing or coherent blue light generation are typically viewed from single-atom perspective. Here we study the surpris…