Concept
Facteur de qualité
Publications associées (181)
Room-temperature quantum optomechanics using an ultralow noise cavity
Tobias Kippenberg, Guanhao Huang, Alberto Beccari, Nils Johan Engelsen
At room temperature, mechanical motion driven by the quantum backaction of light has been observed only in pioneering experiments in which an optical restoring force controls the oscillator stiffness1,2. For solid-state mechanical resonators in which oscil ...
Berlin2024Ultrahigh-quality-factor micro- and nanomechanical resonators using dissipation dilution
Tobias Kippenberg, Alberto Beccari, Nils Johan Engelsen
Mechanical resonators are widely used in sensors, transducers and optomechanical systems, where mechanical dissipation sets the ultimate limit to performance. Over the past 15 years, the quality factors in strained mechanical resonators have increased by f ...
Berlin2024All-Dielectric Nanophotonic via Glass Fluid Instabilities
In this thesis work, we propose to exploit an innovative micro/nano-fabrication process, based on controlled fluid instabilities of a thin viscous film of chalcogenide glass. Amorphous selenium and arsenic triselenide were used in this thesis work, and com ...
EPFL2024NbN films with high kinetic inductance for high-quality compact superconducting resonators
Edoardo Charbon, Pasquale Scarlino, Fabrizio Minganti, Simone Frasca, Marco Scigliuzzo, Vincent Jean Yves Jouanny, Fabian Oppliger, Roberto Musio
Niobium nitride (NbN) is a particularly promising material for quantum technology applications, as it shows the degree of reproducibility necessary for large-scale superconducting circuits. We demonstrate that resonators based on NbN thin films present a o ...
2023Q-Factor Bounds for Microstrip Patch Antennas
Antenna bounds are a useful tool in assessing the feasibility or performance of an antenna design. Microstrip patch antennas are often limited by their relatively narrow bandwidth, and therefore Q-factor is an important design parameter, as it is related t ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2023Metasurface-stabilized optical microcavities
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 PORTFOLIO2023A Front-End CMOS Interface Circuit With High Voltage Charge Pump and Oscillator for Capacitive Micromachined Ultrasonic Transducers
Sandro Carrara, Gian Luca Barbruni, Zhengwen Jiang, Yihe Zhao
Label-free biosensors, combined with miniaturized micro-electromechanical sensory platforms, offer an attractive solution for real-time and facile monitoring of biomolecules due to their high sensitivity and selectivity without the need for specifically la ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2023Time-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 ...
New York2023Optimization of Edge Profile for Improved Anti-Resonance Quality Factor in Lithium Niobate SH0 Resonators
Luis Guillermo Villanueva Torrijo, Silvan Stettler
Thin-film lithium niobate (LNO) has been identified as a promising material platform for enabling high electromechanical coupling and low-loss piezoelectric resonators for filtering applications. In this work, the design and fabrication of fundamental shea ...
IEEE2022Development of Thin Film Lithium Niobate Shear Bulk Acoustic Wave Resonators
RF MEMS piezoelectric acoustic resonators are the essential building blocks for RF filters used in RF front-end modules for wireless mobile communication due to their compact size in the MHz-GHz frequency range, high Quality factors and large relative band ...
EPFL2022