Recherche

Afficher tous les résultats pour

Accueil

Personne

Ileana-Cristina Benea-Chelmus

Cette personne a quitté l’EPFL

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (24)

Page 1 sur 2

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

Gigahertz free-space electro-optic modulators based on Mie resonances

Ileana-Cristina Benea-Chelmus

Electro-optic modulators are essential for sensing, metrology and telecommunications. Most target fiber applications. Instead, metasurface-based architectures that modulate free-space light at gigahertz (GHz) speeds can boost flat optics technology by micr ...

Nature Portfolio2022

Integrated photonic circuits for terahertz applications

Ileana-Cristina Benea-Chelmus

This talk will discuss recent advances in the nascent field of integrated photonic circuits for terahertz applications. This field explores photonic circuit technology to create miniaturized terahertz emitters and detectors by non-linear optical processes ...

IEEE2022

Terahertz waveform synthesis in integrated thin-film lithium niobate platform

Ileana-Cristina Benea-Chelmus

Bridging the "terahertz gap" relies upon synthesizing arbitrary waveforms in the terahertz domain enabling applications that require both narrow band sources for sensing and few-cycle drives for classical and quantum objects. However, realization of custom ...

Nature Portfolio2023

Resonators with tailored optical path by cascaded-mode conversions

Ileana-Cristina Benea-Chelmus

Optical resonators enable the generation, manipulation, and storage of electromagnetic waves. The physics underlying their operation is determined by the interference of electromagnetic waves, giving rise to the resonance spectrum. This mechanism causes th ...

Nature Portfolio2023

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

Present and future of terahertz integrated photonic devices

Ileana-Cristina Benea-Chelmus, Shima Rajabali

Photonic integrated circuits have benefited many fields in the natural sciences. Their nanoscale patterning has led to the discovery of novel sources and detectors from ultraviolet to microwaves. Yet terahertz technologies have so far leveraged surprisingl ...

AIP Publishing2023

Metasurface-stabilized optical microcavities

Ileana-Cristina Benea-Chelmus

Cavities concentrate light and enhance its interaction with matter. Confining to microscopic volumes is necessary for many applications but space constraints in such cavities limit the design freedom. Here we demonstrate stable optical microcavities by cou ...

Nature Portfolio2023

Ultra-broadband terahertz radiation by supercontinuum generation and optical rectification in a dispersion-engineered waveguide: a numerical study

Ileana-Cristina Benea-Chelmus, Aleksei Gaier

In this work, we propose a numerical approach based on forward coupled mode modeling to simultaneously evaluate second- and third-order nonlinearities inside a dispersion-engineered waveguide towards the goal of generating broadband terahertz (THz) radiati ...

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

Ultrathin GHz-speed free-space electro-optic modulators

Ileana-Cristina Benea-Chelmus

We discuss electro-optic modulators from flat optics that change the intensity of light at speeds up to the microwaves. We employ a hybrid platform that combines silicon-silica nanoresonators with an electro-optic organic coating that maximizes the interac ...

IEEE2022

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

MonoliThic Millimeter Wave Generation and Detection from Resonant Lithium Niobate Circuits

Ghalia Dhaoui, Ileana-Cristina Benea-Chelmus, Aleksei Gaier, Jiawen Liu

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

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

Electro-optic sampling of classical and quantum light

Ileana-Cristina Benea-Chelmus

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

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

Time-resolved THz detection on thin-film lithium niobate

Ileana-Cristina Benea-Chelmus

We present an on-chip interface between terahertz and near-infrared fields for time-resolved THz detection. The double-confinement of the probe-signal inside a waveguide and the terahertz field inside a gold antenna increases the nonlinear interaction. The ...

IEEE Computer Society2024