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physics.optics2026

Cryogenic nonlinear processes in thin-film lithium niobate

Tristan Kuttner, Ulrich Sauter, Robert J. Chapman +6

Photonic integrated circuits operating at cryogenic temperatures are necessary for many quantum technologies such as quantum transduction, integrated single-photon emitters and det…

physics.optics2026

Solution-derived barium titanate waveguides for integrated electro-optic modulation

Virginia Falcone, Eleni Prountzou, Jost Kellner +2

Metal oxides with strong nonlinear optical properties and wide transparency window are key materials for the development of compact and efficient photonic integrated circuits used…

physics.optics2025

Nanodomain poling unlocking backward nonlinear light generation in thin film lithium niobate

Alessandra Sabatti, Jost Kellner, Robert J. Chapman +1

Nonlinear frequency conversion offers powerful capabilities for applications in telecommunications, signal processing, and computing. Thin-film lithium niobate (TFLN) has emerged a…

physics.optics2025

Integrated thin film lithium niobate mid-infrared modulator

Pierre Didier, Prakhar Jain, Mathieu Bertrand +7

The mid-infrared spectral range holds great promise for applications such as molecular spectroscopy and telecommunications. Many key molecules exhibit strong absorption features in…

physics.optics2025

Low threshold integrated optical parametric oscillator with a compact Bragg resonator

Jost Kellner, Alessandra Sabatti, Andreas Meader +1

Optical parametric oscillators (OPOs) have been studied as basic components for optical computing with phase encoding and Ising machines. Integrated photonics offers a scalable sol…

physics.optics2024

Efficient GHz electro-optical modulation with a nonlocal lithium niobate metasurface in the linear and nonlinear regime

Agostino Di Francescantonio, Alessandra Sabatti, Helena Weigand +8

Electro-optical modulation is widely employed for optical signal processing and in laser technology. To date, it is efficiently realized in integrated photonic systems as well as i…