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Conference Agenda

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Please note that all times are shown in the time zone of the conference. The current conference time is: 11th Aug 2026, 02:52:06pm CEST

Daily Overview

Session

TOM Nonlinear S2: Nonlinear and Quantum Optics

Time:

Wednesday, 27/Aug/2025:

3:30pm - 5:00pm

Session Chair: Said Rodriguez, AMOLF, Netherlands, The

Location: Frans van Hasseltzaal

2nd Floor

Presentations

3:30pm - 4:00pm
INVITED

Ultrafast nanoscopy via optically controlled high-harmonic generation from solids

Peter Kraus

ARCNL, Vrije Universiteit Amsterdam, Netherlands, The

In this talk, I will introduce the potential of solid-state high harmonic generation (HHG) to interrogate ultrafast dynamics on ultrasmall length scales. I will show that HHG is an ideal tool to probe dynamics on ultrafast time scales, evidenced by the tracing of a non-thermal insulator-to metal phase transition in the correlated material NbO2. Furthermore, the intricate physics of HHG allows near-unity optical emission control of HHG. I will discuss the mechanisms behind this phenomenon, and show how we can utilize this property to spatially confine HHG to below the diffraction limit. This confinement allows employing HHG for super resolution harmonic deactivation microscopy (HADES). This advance paves the way towards sub-femtosecond nanometer resolution in an all-optical far-field microscope.

4:00pm - 4:15pm

Resonant nanostructures based on AlInP – a low-loss material platform for nonlinear nanophotonics

Radoslaw Kolkowski¹, Seyed Ahmad Shahahmadi², Serguei Novikov², Jani Oksanen², Andreas C. Liapis³, Huayu Bai¹, Timo Stolt¹, Matti Kaivola¹, Andriy Shevchenko¹

1: Department of Applied Physics, Aalto University, Finland; 2: Engineered Nanosystems Group, Aalto University, Finland; 3: Department of Electronics and Nanoengineering, Aalto University, Finland

Second-order nonlinear optical materials with high refractive index and wide transparency range are of high demand for various photonic applications. Here, we present nanostructures fabricated in wafer-bonded crystalline aluminum indium phosphide (AlInP). The nanostructures exhibit strong enhancement of second-harmonic generation due to higher-order anapole excitations. Our results illustrate the potential of AlInP for nonlinear nanophotonics.

4:15pm - 4:30pm

Nonlinear Photonics for Sub-Terahertz Sources

Shima Rajabali^1,2, Xinrui Zhu², Hana K. Warner², Yunxiang Song², Leticia Magalhaes², Amirhassan Shams Ansari^2,3, Marko Loncar²

1: Department of Quantum and Computer Engineering, Delft University of Technology, Netherlands; 2: Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA,USA; 3: DRS Daylight Solutions, 16465 Via Esprillo, CA, USA

Terahertz technologies offer unique advantages for communication, sensing, and imaging, yet integrated platforms struggle to perform efficiently in this range. Thin-film lithium niobate, a nonlinear photonic platform, enables compact, broadband, and high-speed terahertz sources through efficient frequency conversion. In this talk, I present our progress on developing sub-terahertz continuous-wave sources on lithium niobate chips, aiming to bridge the gap between electronic and photonic systems for next-generation terahertz integration.

4:30pm - 4:45pm

Phase-locked parametric-down conversion inside soliton waveguides in LNOI films

Eugenio Fazio¹, Alessandro Bile¹, Arif Nabizada¹, Alessandro Belardini¹, Mathieu Chauvet², Micheal Scalora³

1: Department of Fundamental and Applied Sciences for Engineering, Sapienza University of Rome; 2: Université Marie et Louis Pasteur, CNRS, institut FEMTO-ST; 3: 3 FCDD-AMT-MGR, DEVCOM AvMC, Charles M. Bowden Research Center

We have observed for the first time a parametric down conversion process within a solitonic waveguide. This feature ensures an optimal mode-overlapping between the interacting waves. Moreover, the excited photorefractive nonlinearity enables a phase-locking regime that allows the temporal overlapping of the interacting pulses too. A broadband PDC is then possible within a waveguide without special needs for phase-matching and temporal sinchronisation.

4:45pm - 5:00pm

Quantum-enhanced single molecule localization microscopy

Anna Ariel Zhitnitsky, Rens van Dam, Heike Smedes, Bernd Rieger, Sjoerd Stallinga

TU Delft, Department of Imaging Physics, Netherlands

Traditionally, the resolution of optical microscopes is limited to about half the wavelength used. Single-Molecule Localization Microscopy (SMLM) achieves super-resolution by isolating blinking fluorophores across multiple acquisition frames, reaching resolutions down to single nanometers. However, high-density samples present challenges, as overlapping point spread functions (PSFs) limit accurate localization with conventional, e.g. sCMOS, detectors. Single-Photon Avalanche Diode (SPAD) arrays offer new quantum correlation-enhanced techniques to improve detection sensitivity and emitter density resolution in SMLM. Here, we demonstrate a photon-correlation-based approach for multi-emitter fitting and high-density SMLM in a scanning configuration.

A 23-pixel SPAD array with integrated time-correlated photon counting is used as the detector in a fluorescence confocal-scanning microscope. Crucially, fluorophores are single-photon emitters. The photon arrival times are used to compute the second-order quantum correlation of the signal, which is directly related to the number of emitters in the scanning location. This information makes it possible to locate fluorophores with overlapping point spread functions, consequently, SPAD arrays provide the ability to image in high emitter densities, which enables faster data acquisition and dynamic imaging.