Conference Agenda

Session

TOM Quantum Optics S3: Quantum Transduction and Nonlinear Frequency Conversion

Time:

Wednesday, 26/Aug/2026:

2:30pm - 4:00pm

Location: Henrika 4

Presentations

2:30pm - 3:00pm
INVITED

Towards electro-optic transduction of mmwave quantum signals

André Garcia Primo, Jiawen Liu, Amit Vankayala, Gabriel Jülg, Yazan Lampert, Aleksei Gaier, Ileana-Cristina Benea-Chelmus

EPFL, Switzerland

We present a mmwave-to-optics transducer with an order-of-

magnitude improvement in coupling rates over the current state-of-the-art. Our

device enables the direct optical readout of mmwave thermal noise, with a cor-

responding mode occupancy of approximately 20 photons at 270 GHz.

3:00pm - 3:15pm

Stairway to solitons in the down conversion regime

Francesco Rinaldo Talenti, Dmitry Skryabin

Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom

We consider a problem of half harmonic generation in a ring microresonator. A near visible pump has normal dispersion and triggers a staircase structure of parametric instabilities to 1550nm light. We report mechanisms of transition from narrow band parametric generation to either two colour bright solitons generation or to the pump only dark solitons. Interplay of χ(2)and χ(3) nonlinearities is paramount in either case.

3:15pm - 3:30pm

Electro-optic spectral modification of mid-infrared single photons

Jan Krzyżanowski¹, Michał Mikołajczyk¹, Jerzy Szuniewicz¹, Sanjay Kapoor¹, Thomas McMinn², Rex H. S. Bannerman², James C. Gates², Peter G. R. Smith², Michał Karpiński¹

¹Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warszawa, Poland; ²Optoelectronics Research Centre, University of Southampton, Southampton, United Kingdom

We experimentally demonstrate electro-optic spectral modification of mid-infrared single-photon pulses. We show 1.6-fold spectral bandwidth compression of heralded single photons, dispersive-Fourier-transform spectral measurement and active spectral shift of heralded 2.07-μm single photons. Our results may enable modifying the properties of photons emitted by mid-infrared sources for applications in quantum sensing or communication.

3:30pm - 3:45pm

Selective Raman frequency up- and down-conversion of weak signals via molecular modulation in hydrogen-filled hollow-core fibres

Arturo Mena¹, Pau Arcos¹, María Sánchez-Hernández¹, Benoit Debord², Frédéric Gérôme², Fetah Benabid², Nicolas Joly^3,4, Oskar Arrizabalaga¹, Joseba Zubia¹, David Novoa^1,5

¹University of the Basque Country; ²XLIM Research Institute; ³Friedrich-Alexander-University Erlangen-Nürnberg; ⁴Max Planck Institute for the Science of Light; ⁵IKERBASQUE, Basque Foundation for Science

We report the frequency conversion of low-intensity signals in the visible spectrum, achieving shifts of 125 THz trough molecular modulation in a hydrogen-filled hollow-core fibre. This approach relies on the Raman coherence waves generated by a pump pulse, enabling operation below the Raman threshold to transduce weak signals with near-unity efficiency. We show that either up- or down-conversion can be selected by tuning the gas pressure. These results may support the interconnection of visible and near infrared quantum technologies.