Publications associées à Digital Silicon Photonic MEMS Phase-Shifter

High sensitivity, incoherent differential imaging

Microscopic visualisation of optically transparent samples has been a topic of interest for several decades. Features such as density or chemical composition can influence the optical phase of transmitted light, and phase contrast can reveal these structur ...

EPFL2022

Phase Reconstruction of Low-Energy Electron Holograms of Individual Proteins

Klaus Kern, Stephan Rauschenbach, Sven Alexander Szilagyi, Hannah Julia Ochner

Low-energy electron holography (LEEH) is one of the few techniques capable of imaging large and complex three-dimensional molecules, such as proteins, on the single molecule level at subnanometer resolution. During the imaging process, the structural infor ...

AMER CHEMICAL SOC2022

Lock-in incoherent differential phase contrast imaging

Christophe Moser, Damien Claude-Marie Loterie, Timothé Laforest, Chiara Bonati

We introduce a lock-in method to increase the phase contrast in incoherent differential phase contrast (DPC) imaging. This method improves the phase sensitivity by the analog removal of the background. The use of a smart pixel detector with in-pixel signal ...

CHINESE LASER PRESS2022

Incommensurate crystal structure of PbHfO3

Alla Arakcheeva

Controversy in the description/identification of so-called intermediate phase(s) in PbHfO3, stable in the range similar to 420-480 K, has existed for a few decades. A synchrotron diffraction experiment on a partially detwinned crystal allowed the structure ...

INT UNION CRYSTALLOGRAPHY2020

Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic Grating Couplers at GHz Frequencies

Dirk Grundler, Ping Che, Korbinian Baumgärtl, Andrea Mucchietto

On-chip signal processing at microwave frequencies is key for modern mobile communication. When one aims at small footprints, low power consumption, reprogrammable filters, and delay lines, magnons in low-damping ferrimagnets offer great promise. Ferromagn ...

American Chemical Society (ACS)2020

Low-Power Design of Digital VLSI Circuits around the Point of First Failure

Andrea Bonetti

As an increase of intelligent and self-powered devices is forecasted for our future everyday life, the implementation of energy-autonomous devices that can wirelessly communicate data from sensors is crucial. Even though techniques such as voltage scaling ...

EPFL2019

Compact lensless digital holography

Manon Rostykus

Microscopy is of high interest for biology since it allows imaging features that are too small to be seen with naked eyes. However, cells are mostly transparent to visible and infrared light which makes it difficult to see with a traditional microscope. To ...

EPFL2018

A 60 Gb/s 1.9 pJ/bit NRZ Optical-Receiver with Low Latency Digital CDR in 14nm CMOS FinFET

Yusuf Leblebici, Alessandro Cevrero, Lukas Kull, Thomas Toifl, Ilter Ozkaya

This work reports a low power implementation of a 60Gb/s NRZ optical receiver (RX) in 14nm bulk CMOS finFET featuring a first-order digital CDR with high jitter tolerance (JTOL). The design includes a single phase-rotator (PR) with low complexity control l ...

2017

Structured amplitude and phase fields behind microstructures: The quest for high contrast modulation at proximity

Hans Peter Herzig, Myun Sik Kim, Toralf Scharf, Johana Bernasconi, Krishnaparvathy Puthankovilakam

Microstructures can be used to realize repetitive and singular high contrast features at different distances behind a structure. For practical applications, the amplitude field needs to be considered. To realize defined amplitude features at long distances ...

Spie-Int Soc Optical Engineering2016

Coherent terabit communications with microresonator Kerr frequency combs

Tobias Kippenberg, Tobias Herr, Jingshi Li, Victor Brasch

Optical frequency combs have the potential to revolutionize terabit communications(1). The generation of Kerr combs in nonlinear microresonators(2) is particularly promising(3), enabling line spacings of tens of gigahertz. However, such combs may exhibit s ...

Nature Publishing Group2014

Remotely-Powered Batteryless Implantable Local Temperature Monitoring System for Freely Moving Mice

Brown adipose fat tissue of a mouse dissipates the animal’s energy in the form of heat. Chronically recording the temperature of this tissue helps biologists to study the metabolism of the animal and gain new insights about the obesity in humans. Such temp ...

EPFL2014

Brillouin distributed sensing using localized and stationary dynamic gratings

Luc Thévenaz, Nikolay Primerov

In this work, we apply a recent technique for the generation of stimulated Brillouin scattering (SBS) dynamic gratings that are both localized and stationary to realize high-resolution distributed temperature sensing. The gratings generation method relies ...

Society of Photo-Optical Instrumentation Engineers (SPIE)2012

Tunable and reconfigurable multi-tap microwave photonic filter based on dynamic Brillouin gratings in fibers

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov

We propose and experimentally demonstrate new architectures to realize multi-tap microwave photonic filters, based on the generation of a single or multiple dynamic Brillouin gratings in polarization maintaining fibers. The spectral range and selectivity o ...

Optical Society of America2012

Variable delay using stationary and localized Brillouin dynamic gratings

Luc Thévenaz, Nikolay Primerov

Reflections from movable, dynamic acoustic gratings in polarization maintaining (PM) fibers are employed in the long variable delay of periodic, isolated pulses. The gratings are introduced by stimulated Brillouin scattering (SBS) interaction between two c ...

Society of Photo-Optical Instrumentation Engineers (SPIE)2012

Ultra-Low Power 32-bit Pipelined Adder Using Subthreshold Source-Coupled Logic with 5fJ/stage PDP

Yusuf Leblebici, Seyed Armin Tajalli

This article presents a new approach for improving the power-delay performance of subthreshold source-couple logic (STSCL) circuits. Using a simple two-phase pipelining technique, it is possible to increase the activity rate of STSCL gates with negligible ...

2009

Advanced phase-contrast imaging using a grating interferometer

Christian David, Marco Stampanoni

Phase-sensitive X-ray imaging methods can provide substantially increased contrast over conventional absorption-based imaging, and therefore new and otherwise inaccessible information. Differential phase-contrast (DPC) imaging, which uses a grating interfe ...

2009

Low power frequency synthesizer for mobile communications systems

Imre Kovacs

A novel frequency synthesizer with a strong emphasis on low-power consumption (2mW) was developed for this thesis. A BAW-resonator was used for the design of the high-frequency oscillator. The BAW's high Q-Factor ensured a minimal power consumption, while ...

EPFL2009

Three-dimensional electronic devices fabricated on a top-down silicon nanowire platform

Kirsten Emilie Moselund

For the past couple of decades the desire to add more complexity to a computer chip, while simultaneously reducing the cost per bit, has been accommodated by down-scaling. This approach has been extremely successful in the past, but like all good things it ...

EPFL2008

Cellular dynamics explored with digital holographic microscopy

Benjamin Rappaz

Obtaining high resolution 3D quantitative images is critical for elucidating the relationship between cell dynamics and physiological or pathological processes. However the feasibility of such cellular dynamic studies is limited by the resolution of the 3D ...

EPFL2008

Ultra Low-Power MEMS-based Radio for Wireless Sensor Networks

Christian Enz, Nicola Scolari

The recent advances made in MEMS and particularly in RF MEMS technology are enabling new architectures for the integration of RF transceivers with improved performance and smaller size. Several fundamental building blocks benefit from the availability of h ...

2007