Publications by Ileana-Cristina Benea-Chelmus

Electro-optic sampling of classical and quantum light

Full characterization of electric-field waveforms in amplitude and phase is achieved across the terahertz to visible spectral range through interaction with an optical pulse shorter than a half-cycle period via the Pockels (linear electro-optic) effect. Th ...

2025

Field-Resolved Detection of Broadband Terahertz Pulses with Thin-Film Lithium Niobate Integrated Microring Resonators

Ileana-Cristina Benea-Chelmus, Alessandro Tomasino

The Terahertz (THz) frequency domain lies between the realms of microwave and optics, with frequencies conventionally spanning the 0.1-10 THz spectral range [1]. Many commercially-available THz systems routinely exploits optical down/up conversion mechanis ...

IEEE2025

Single-Chip for Terahertz Emission and Detection on Thin-Film Lithium Niobate Platform

Ileana-Cristina Benea-Chelmus, Alessandro Tomasino

The terahertz (THz) frequency region (0.1-10 THz) between microwaves and infrared, holds significant potential across various fields such as communication, sensing, and spectroscopy. Conventional THz systems for broadband emission and detection remain bulk ...

IEEE2025

Electro-Optic Metasurface for Tunable External Cavity Lasers

Ileana-Cristina Benea-Chelmus, Alessandro Tomasino, Francesco Bertot

Tunable electro-optic metasurfaces have proven to be excellent platforms when it comes to compact and fast modulation of free space light [1] which makes them relevant for applications like coherent laser ranging[2] and fast spatial light modulators. In th ...

IEEE2025

Photonics-integrated terahertz transmission lines

Ileana-Cristina Benea-Chelmus, Alessandro Tomasino, Yazan Lampert Almahmoud, Aleksei Gaier

Modern communication and sensing technologies connect the optical domain with the microwave domain. Accessing the terahertz region from 100 GHz to 10 THz is critical for providing larger bandwidths capabilities. Despite progress in integrated electronics, ...

2025

MonoliThic Millimeter Wave Generation and Detection from Resonant Lithium Niobate Circuits

Ileana-Cristina Benea-Chelmus, Aleksei Gaier

High-frequency electro-magnetic waves, including millimeter wave (mmWave) and terahertz, represent a frontier of research with transformative potentials in next-generation wireless communication, advanced sensing and imaging, and quantum science and applic ...

IEEE2025

Cascaded-mode interferometers: Spectral shape and linewidth engineering

Ileana-Cristina Benea-Chelmus

Interferometers are essential tools for measuring and shaping optical fields, widely used in optical metrology, sensing, laser physics, and quantum mechanics. They superimpose waves with a mutual phase delay, modifying light intensity. A frequency-dependen ...

AMER ASSOC ADVANCEMENT SCIENCE2025

Broadband plasmonic-organic terahertz field sensor on a silicon-on-insulator platform

Ileana-Cristina Benea-Chelmus, Alessandro Tomasino, Francesco Bertot

We propose an innovative configuration for the on-chip detection of terahertz fields relying on a hybrid silicon-organic platform. In particular, we combine silicon waveguides with terahertz antennas and nonlinear optical polymers to perform an integrated ...

IEEE Computer Society2024

Broadband Terahertz emitters from phase-matched lithium niobate photonics

Ileana-Cristina Benea-Chelmus, Alessandro Tomasino, Yazan Lampert Almahmoud

We present emission up to 3 THz from a phase-matched terahertz-optical photonic circuit, featuring a co-planar metallic cavity traversed by an optical rib waveguide and a dipolar antenna for efficient out-coupling of terahertz waves. ...

Institute of Electrical and Electronics Engineers Inc.2024

On-chip terahertz thin-film devices

Ileana-Cristina Benea-Chelmus, Alessandro Tomasino, Yazan Lampert Almahmoud

A terahertz device for detecting or emitting or for both detecting and emitting electromagnetic waves in the terahertz frequency range. The terahertz device comprises: a first waveguide branch and a second waveguide branch, the first and second waveguide b ...

2024