Publications de Elsie Barakat | EPFL Graph Search

Experimental investigation of the propagation properties of Bloch surface waves on dielectric multilayer platform

Hans Peter Herzig, Elsie Barakat, Richa Dubey

Background: The periodic dielectric multilayers sustaining Bloch surface waves have been proposed as a platformfor the sensing applications and the two dimensional integrated optics. In this paper, we present the experimental and theoretical investigation ...

2017

Near-field investigation of Bloch surface wave based 2D optical components

Hans Peter Herzig, Myun Sik Kim, Elsie Barakat, Richa Dubey, Babak Vosoughi Lahijani

We study the Bloch surface wave based nano-thin 2D optical components. The 2D elements are fabricated on the dielectric multilayer platform which sustains the Bloch surface waves. Such a platform is considered as a novel foundation for planar integrated op ...

Spie-Int Soc Optical Engineering2017

Optics in 2D, Bloch surface wave phenomena and applications

Hans Peter Herzig, Myun Sik Kim, Elsie Barakat, Richa Dubey

Nano-photonics, where optical structures can manipulate light at the sub-wavelength scale, is making important advances towards optical communications, imaging and sensing. A novel platform suitable for fundamental investigations of light propagation throu ...

Ieee2016

2D photonic nanojet via Bloch surface wave: limitations and beyond

Hans Peter Herzig, Myun Sik Kim, Elsie Barakat, Richa Dubey

2016

Nano-Thin 2D Axicon Generating Nondiffracting Surface Waves

Hans Peter Herzig, Myun Sik Kim, Elsie Barakat, Richa Dubey

We investigate nondiffracting surface waves. On top of the Bloch surface wave platform, a 60-nm-thick TiO2 isosceles triangle serves as a 2D axicon. Scanning near-field microscopy measurements verify nondiffracting surface beam properties. ...

Ieee2016

Real-time Protein Aggregation Monitoring based on a Simultaneous Light Scattering Investigation and a Bloch Surface Wave-based Approach

Hans Peter Herzig, Elsie Barakat, Sara Santi

We present a study of the dynamics of protein aggregation using a Bloch surface wave (BSW) label-free sensing scheme. In a previous work, we demonstrated the ability to detect the early dynamic events of fibrillogenesis of amyloid beta-peptides (A beta), l ...

Spie-Int Soc Optical Engineering2015

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