Publications de Libo Yu | EPFL Graph Search

SKA Science Data Challenge 2: analysis and results

Jean-Paul Richard Kneib, Xin Chen, Frédéric Courbin, Jean-Luc Starck, Emma Elizabeth Tolley, Yi Zhang, Lei Zhang, Hua Zhang, Xiuwei Zhang, Libo Yu

The Square Kilometre Array Observatory (SKAO) will explore the radio sky to new depths in order to conduct transformational science. SKAO data products made available to astronomers will be correspondingly large and complex, requiring the application of ad ...

OXFORD UNIV PRESS2023

Phase-sensitive near field Investigation of Bloch surface wave propagation in curved waveguides

Hans Peter Herzig, Jian Wang, Liang Sun, Elsie Barakat, Libo Yu, Qing Tan

Bloch surface waves (BSWs) are electromagnetic surface waves excited in the band gap of a one dimensional dielectric photonic crystal. They are confined at the interface of two media. Due to the use of dielectric material, the losses are very low, which al ...

European Optical Soc2014

Manipulating Bloch surface waves in 2D: a platform concept-based flat lens

Hans Peter Herzig, Elsie Barakat, Libo Yu, Tristan Sfez, Lubos Hvozdara, Joab Di Francesco

At the end of the 1970s, it was confirmed that dielectric multilayers can sustain Bloch surface waves (BSWs). However, BSWs were not widely studied until more recently. Taking advantage of their high-quality factor, sensing applications have focused on BSW ...

Nature Publishing Group2014

Investigation of ultra-thin waveguide arrays on a Bloch surface wave platform

Hans Peter Herzig, Elsie Barakat, Libo Yu

Ultra-thin polymer optical waveguide couplers for integrated optics based on Bloch surface waves (BSWs) are presented. Desirable BSW guiding properties, such as low loss and long propagation distance, are observed. The waveguide thickness is on the order o ...

Optical Society of America2014

Near-field imaging : investigations on Bloch surface wave based 2D optics and the development of polarization-retrieved characterization

Libo Yu

Bloch surface waves (BSWs) are surface electromagnetic waves excited at the interface between a truncated periodic dielectric multilayer and a surrounding medium. This particular solution to the Maxwell equations in stratified media has been known since th ...

EPFL2013

Growth study of indium-catalyzed silicon nanowires by plasma enhanced chemical vapor deposition

Anna Fontcuberta i Morral, Sonia Conesa Boj, Libo Yu, Père Roca i Cabarrocas

Indium was used as a catalyst for the synthesis of silicon nanowires in a plasma enhanced chemical vapor deposition reactor. In order to foster the catalytic activity of indium, the indium droplets had to be exposed to a hydrogen plasma prior to nanowire g ...

2010

Ultrathin waveguides for Bloch Surface Waves: near-field analysis of propagation and polarization

Olivier Martin, Hans Peter Herzig, Libo Yu, Tristan Sfez, Daniele Brunazzo

We demonstrate that an ultrathin ridge (< lambda/10) can guide Bloch surface waves in a dielectric multilayer. The propagation and polarization properties of the guided modes are investigated with a multi-heterodyne scanning near-field optical microscope. ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

Bloch surface waves in ultrathin waveguides: near-field investigation of mode polarization and propagation

Olivier Martin, Hans Peter Herzig, Libo Yu, Tristan Sfez, Daniele Brunazzo, Francesco Michelotti

In this work, we use a multi-heterodyne scanning near-field optical microscope to investigate the polarization and propagation of Bloch surface waves in an ultrathin (similar to lambda/10) ridge waveguide. First, we show that the structure sustains three s ...

2010

Near-field polarization measurements based on two arbitrary, orthogonal optical field components

Olivier Martin, Hans Peter Herzig, Libo Yu, Tristan Sfez, Daniele Brunazzo, Francesco Michelotti

Using a multi-heterodyne scanning near-field optical microscope, we detect two arbitrary, orthogonal components of the near field. A numerical treatment of the experimental data allows the retrieval of the transverse and longitudinal components of the mode ...

2010

Two-dimensional optics on silicon nitride multilayer: Refraction of Bloch surface waves

Hans Peter Herzig, Libo Yu, Tristan Sfez, Francesco Michelotti

When properly designed, a dielectric multilayer can sustain Bloch surface waves (BSWs). Using a multiheterodyne scanning near-field optical microscope that resolves phase and polarization, we will show that a thin dielectric structure deposited on the mult ...

American Institute of Physics2010