News & Events

We present a broadband, high speed electro optic Mach Zehnder modulator designed for operation in the emerging mid infrared range. 

By making use of advanced nonlinearity engineering techniques, we implement a scheme of generating high-purity photon pairs directly on-chip. 

We are looking for a PhD student in thin film lithium niobate nanofabrication. 

See us at the SPIE Photonics Europe 2026!

We show a new type of photon pair source on TFLN using counter propagating Type0 SPDC, producing uncorrelated and separated photons that can be used for quantum computing and communications.

Losses and electro-optic properties characterized by ETH Zurich.

Rachel Grange, who was appointed Head of the Department as well as Full Professor of Photonics in the summer of 2025, talks in an interview about what makes a research group healthy and why improving gender ratios in science isn't all down to role models.

Our latest article in Light: Science & Applications demonstrates a programmable LNOI photonic chip capable of generating Bell states with high fidelity. 

A summarizing poster on our work in polycrystalline lithium niobate metasurfaces was awarded the best poster prize at this year's Metamaterials conference (the 19th International Congress on Artificial Materials for Novel Wave Phenomena).

A single waveguide converts and broadens light into the near-ultraviolet spectrum

We present our new article on "Barium Titanate Nanostructures and Thin Films for Photonics", which is part of the Advanced Optical Materials Hall of Fame article series. We review the progress in various applications based on barium titanate nanostructures and thin films for photonics and forsee future technologies that may benefit from this material platform in the near future.

We have managed to make an efficient material for broadband frequency doubling of light using microspheres made of disordered nanocrystals.  

The first peer-mentoring programme for female first semester Bachelor students started with a welcoming-apéro organized by Viola Vogler-Neuling from the ONG group last week. Prof. Rachel Grange joined to welcome the students as she is currently teaching the Physics 1 lecture and was strongly supporting the programme.

Solution-processed barium titanate nonlinear woodpile photonic structures with large surface areas – Issue 5, 2020

Prof. Dr. Rachel Grange is teaching the Physics I lectures in autumn semester 2020.

Switchable Photonic Metasurfaces: Electro‐Optic Metasurfaces Based on Barium Titanate Nanoparticle Films - Issue 17, 2020.

See us online at Metanano!

The ONG member Marc Reig Escalé has been awarded with an ETH Pioneer Fellowship, where the commercialization of photonic integrated circuits for telecommunications will take place. Congratulations!  

See us online at EOSAM!

We demonstrated a method to control and redirect the directionality of  second‐harmonic generation emission by engineering the geometry and position of rod nanoantennas, fabricated from sliced III-V semiconductor nanowires. We built a phase array of rod nanoantennas to tailor nonlinear optical response by adjusting their length and position to achieve a targeted phase difference.

A novel concept of electro‐optic switching is introduced by A. Karvounis et. al. We employ an adjacent BaTiO₃ nanoparticle film to a plasmonic metasurface to electrically control the optical reflection of a photonic metasurface dynamically. Nanoparticle films are deposited on large scale and great uniformity, while maintain optical nonlinear properties such as SHG.

Check out our posters at the virtual poster session of POM 2020 on 22nd of June!

Check out the outstanding invited speakers and register today! (it's free!!)

Three dimensional nonlinear photonic crystals are well known candidates for a wide variety of optical applications, but notoriously hard to fabricate in large scale. V. V. Vogler-Neuling et al. combined a bottom-up fabrication technique with barium titanate nanoparticles to achieve large area photonic crystals with up to eight layers.

More than 1000 researchers gathered online for the inaugural Photonics Online Meetup (POM, https://sites.usc.edu/pom/) on January 13th 2020. They simultaneously attend the five hours conference either alone from their personal computer or at their university from hubs distributed across five continents and many time zones.

About a thousand researchers worldwide participated in the Photonics Online Meetup POM20.

In collaboration with researchers from Australian National University, G. Saerens and M. Timofeeva demonstrated new types of GaAs nanoantennas with special nonlinear tensorial properties of material, that allows to switch the SHG emission directionality for forward to backward and back only by rotating the polarization of the incident light.

EU Grant access wrote a science story about our projects financed by the European Union.