Distributed and dynamic strain sensing with high spatial resolution and large measurable strain range

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Probing and manipulating the spatiotemporal dynamics of hot carriers in nanoscale metals is crucial to a plethora of applications ranging from nonlinear nanophotonics to single-molecule photochemistry. The direct investigation of these highly non-equilibri ...

This paper proposes a novel temperature sensing method using stimulated Brillouin scattering in a hollow-core fiber filled with gas. Compared to classical Brillouin sensors, the Brillouin response of gases shows a higher sensitivity at cryogenic temperatur ...

Microcantilevers are popular transducers thanks to their simple design and a high sensitivity. In many applications, the cantilevers need to be actuated, either to induce a controlled deflection or to excite the resonance. This can be achieved with integra ...

For the EU DEMO conductor testing, a temperature sensor based on Fiber Bragg Grating (FBG) optical fiber is studied at the EPFL Swiss Plasma Center. The SULTAN test facility has been upgraded to use fiber optic sensor for temperature monitoring and quench ...

This thesis reports high energy-density electrostatic actuators for use in soft robotics. This thesis has two main parts: a) a detailed study of electro-adhesion using microfabricated electrodes, and b) a flexi-ble fiber-shaped linear motor. Electro-adhesi ...

The invention of the laser in the 1960s heralded a new era in photonics. Owing to both, academic and industrial research, photonics technologies have long become part of our everyday life. This PhD thesis explores two subfields of laser technologies: Frequ ...

In this letter, we introduce an optimal transport framework for inferring power distributions over both spatial location and temporal frequency. Recently, it has been shown that optimal transport is a powerful tool for estimating spatial spectra that chang ...

This thesis investigates the magnetic properties of single atoms and molecules adsorbed on thin magnesium oxide decoupling layers, grown on a silver single crystal. To address these systems experimentally, we use a low temperature scanning tunneling micros ...

Phase imaging is widely used in biomedical imaging, sensing, and material characterization, among other fields. However, direct imaging of phase objects with subwavelength resolution remains a challenge. Here, we demonstrate subwavelength imaging of phase ...

Silicon photonics has emerged as a mature technology that is expected to play a key role in critical emerging applications, including very high data rate optical communications, distance sensing for autonomous vehicles, photonic-accelerated computing, and ...

Significance: Fluorescence guidance is used clinically by surgeons to visualize anatomical and/or physiological phenomena in the surgical field that are difficult or impossible to detect by the naked eye. Such phenomena include tissue perfusion or molecula ...

Keeping up with our constantly connected lifestyle of instant messages and video streaming has its repercussions. Data centers have been gobbling up resources becoming a significant share of the energy used worldwide. To keep up with demand and curb the en ...

We demonstrate the linear electro-optic effect in a silicon nitride micro-ring in which an effective second order nonlinearity is enabled by optically assisted electrical poling. Charge carriers' separation in the waveguide creates a permanent electric-fie ...

Cross-resolution face recognition has become a challenging problem for modern deep face recognition systems. It aims at matching a low-resolution probe image with high-resolution gallery images registered in a database. Existing methods mainly leverage pri ...

The proliferation of microscopy methods for live-cell imaging offers many new possibilities for users but can also be challenging to navigate. The prevailing challenge in live-cell fluorescence microscopy is capturing intra-cellular dynamics while preservi ...

Integrated optics has shown itself very convenient for exploiting nonlinear processes as it results in high confinement factor, freedom of dispersion engineering and compactness. However, the choice of materials is crucial for the development of nonlinear ...

Patterns in nature arise from processes interacting across a continuum of spatial scales, where new relationships emerge at each level of investigation. These patterns are nested features encompassing fine-scale local patterns, such as topography and geolo ...

In this thesis, we discuss the problems of scattering and optical manipulation related to nanosystems of different complexities. The multipolar decomposition method is used to represent scattering processes in nanosystems as a series of elementary excitati ...

Controlling and shaping radiation beams is fundamental for a better understanding of radiation-matter interaction and advancing experimental techniques for material characterization at high spatial resolution. In particular, the current trend in the miniat ...

Stretchable and conductive nanocomposites are emerging as important constituents of soft mechanical sensors for health monitoring, human-machine interactions, and soft robotics. However, tuning the materials' properties and sensor structures to the targete ...

Distributed and dynamic strain sensing with high spatial resolution and large measurable strain range

Chattez avec Graph Search

Visualizing hot carrier dynamics by nonlinear optical spectroscopy at the atomic length scale

Absolute Temperature Sensing in the 67-350 K Range Using Brillouin Scattering in Gases

Fabrication of fluid-compatible trilayer cantilevers with integrated piezoelectric actuators

Quench Detection and Temperature Measurement With Fiber Optic Sensors

High energy-density electrostatic actuators for soft robotics

Thulium-doped fiber cavities for frequency comb generation at 2 micron

Multi-Frequency Tracking via Group-Sparse Optimal Transport

Magnetism of Single Surface Adsorbed Atoms Studied with Radio-Frequency STM

Subwavelength imaging using a solid-immersion diffractive optical processor

Integrated silicon photonic MEMS

Subsurface fluorescence time-of-flight imaging using a large-format single-photon avalanche diode sensor for tumor depth assessment

Domain Imaging and Switching Dynamics in BaTiO3-Based Photonic Integrated Devices

Optically assisted electrical poling of silicon nitride integrated resonators

Cross-resolution Face Recognition via Identity-Preserving Network and Knowledge Distillation

Live-cell imaging powered by computation

Hybrid lithium niobate-on-silicon nitride platform for mid-IR supercontinuum generation

At what spatial scale does natural selection operate? Using multiscale frameworks to calibrate the effects of environmental factors across landscape continuums

Frequency and time domains interactions in nanophotonics

Quantum engineering and detection of advanced radiation beams

Thermally Drawn Elastomer Nanocomposites for Soft Mechanical Sensors