Publications by Alessandro Tomasino

Related publications (12)

Time-Domain Integration of Broadband Terahertz Pulses via Tapered Two-Wire Waveguide

In this work, we report on the implementation of a time-domain integrator device operating on arbitrary broadband Terahertz (THz) pulses. This analog signal-processing functionality is implemented by employing a two-wire waveguide (TWWG) variant, based on ...

IEEE2023

Tunable pump compression and fast modulation for pulsed THz generation

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

We demonstrate tunable dispersion compensation of femtosecond pulses at telecom wavelengths for broadband Terahertz generation in 7.5-meter fiber link using a Silicon prism pair. The prism pair enhances the amplitude of the THz E-field in InGaAs photocondu ...

IEEE2023

Photonics-integrated terahertz transmission lines

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

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

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

Ileana-Cristina Benea-Chelmus, Alessandro Tomasino, Jiawen Liu

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, Xuhui Cao

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

Zahra Basiri, 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

Design of a low-loss hybrid silicon-organic terahertz field detector

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

We propose an innovative design for an integrated, low-loss on-chip terahertz (THz) field detector based on hybrid silicon-organic slot waveguides and THz antennas. We perform a numerical study of the dependency of electro-optic interaction on geometrical ...

IEEE2022

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

500 GHz field-resolved detection in thin-film lithium niobate devices

Ileana-Cristina Benea-Chelmus, Alessandro Tomasino

In this work, we show the coherent reconstruction of terahertz (THz) transients in thin-film lithium niobate integrated photonics circuits. Our devices modulate the intensity of a probe beam guided through a Mach-Zehnder interferometer (MZI) structure, und ...

IEEE2023

Resolving sub-cycle signatures: A perspective on hallmarks of terahertz metrology

Ileana-Cristina Benea-Chelmus, Alessandro Tomasino

Frequency up-conversion has become amongst the most prevalent techniques for detection of terahertz waves in metrology systems. State-of-the-art up-conversion techniques rely on the coherent transferring of the information encoded in all degrees of freedom ...

2023

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

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