Publications by Banafsheh Abasahl

Fabrication of plasmonic structures with well-controlled nanometric features: a comparison between lift-off and ion beam etching

Christian Santschi, Olivier Martin, Banafsheh Abasahl

After providing a detailed overview of nanofabrication techniques for plasmonics, we discuss in detail two different approaches for the fabrication of metallic nanostructures based on e-beam lithography. The first approach relies on a negative e-beam resis ...

IOP PUBLISHING LTD2021

MORPHIC: Programmable photonic circuits enabled by silicon photonic MEMS

Niels Quack, Banafsheh Abasahl, Hamed Sattari, Alain Yuji Takabayashi

In the European project MORPHIC we develop a platform for programmable silicon photonic circuits enabled by waveguide-integrated micro-electro-mechanical systems (MEMS). MEMS can add compact, and low-power phase shifters and couplers to an established sili ...

SPIE-INT SOC OPTICAL ENGINEERING2020

Silicon Photonic MEMS: Exploiting Mechanics at the Nanoscale to Enhance Photonic Integrated Circuits

Niels Quack, Banafsheh Abasahl, Shiv Ashish Kumar, Hamed Sattari, Alain Yuji Takabayashi, Yu Zhang

With the maturing and the increasing complexity of Silicon Photonics technology, novel avenues are pursued to reduce power consumption and to provide enhanced functionality: exploiting mechanical movement in advanced Silicon Photonic Integrated Circuits pr ...

IEEE2019

Surface-to-volume ratio controls the radiation of stratified plasmonic antennas

Christian Santschi, Olivier Martin, Banafsheh Abasahl

Surface plasmons are excited at a metal/dielectric interface, through the coupling between conduction electrons and incident photons. The surface plasmon generation is therefore strongly determined by the accessibility of the surface to the incoming electr ...

2017

Interaction of LSP resonances and Fabry-Perot cavity modes

Olivier Martin, Banafsheh Abasahl, Shourya Dutta Gupta

2015

Cavity-Coupled Plasmonic Device with Enhanced Sensitivity and Figure-of-Merit

Olivier Martin, Banafsheh Abasahl, Shourya Dutta Gupta, Mohsen Bahrami Panah

Using full-wafer processing, we demonstrate a sophisticated nanotechnology for the realization of an ultrahigh sensitive cavity-coupled plasmonic device that combines the advantages of Fabry-Perot microcavities with those of metallic nanostructures. Coupli ...

American Chemical Society2015

Design and Fabrication of Plasmonic Nanoantennas to Control Light at the Nanoscale

Banafsheh Abasahl

EPFL2014

Quantitative Extraction of Equivalent Lumped Circuit Elements for Complex Plasmonic Nanostructures

Christian Santschi, Olivier Martin, Banafsheh Abasahl

We establish a general method to bridge the gap between full-field electromagnetic calculations and equivalent lumped circuit elements to describe the optical response of plasmonic nanostnictures. The exact value of each lumped element is extracted from on ...

Amer Chemical Soc2014

Coupling Strength Can Control the Polarization Twist of a Plasmonic Antenna

Christian Santschi, Olivier Martin, Banafsheh Abasahl, Shourya Dutta Gupta

The far-field polarization of the optical response of a plasmonic antenna can be tuned by subtly engineering of its geometry. In this paper, we develop design rules for nano antennas which enable the generation of circular polarized light via the excitatio ...

American Chemical Society2013

Engineering absorption losses in plasmonic nanostructures

Theo Lasser, Olivier Martin, Krishnan Thyagarajan, Banafsheh Abasahl

2013

Hybrid plasmonic biosensor: Capturing the best of both SPR and LSPR

Olivier Martin, Banafsheh Abasahl, Arash Farhang

2013

Hybrid nanoparticle and thin film SPR biosensor with a high figure of merit

Olivier Martin, Banafsheh Abasahl, Arash Farhang

Due to their extreme sensitivity to refractive index changes, surface plasmon resonance (SPR) sensors have long been established as extremely valuable tools for biosensing. In the past few years researchers have begun investigating various other metallic n ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2012

Fabrication of Free-Standing Plasmonic Nanoantennas with Application for Optical Break Junctions

Christian Santschi, Olivier Martin, Banafsheh Abasahl

We report the fabrication of plasmonic nanoantennas with dimensions in the 200 - 300 nm range, suspended across a nano-undercut, which will be used for the investigation of the optical properties of break junctions. Nanochannels, fabricated using e-beam li ...

Ieee2012

Plasmonic break junctions: Controlling optical nanostructures with dimensions between atomic contact and a few Agstroms

Christian Santschi, Olivier Martin, Banafsheh Abasahl

2012

Optical and electrical transport in the ultimate near-field of plasmonic antennas with a very small gap

Olivier Martin, Andreas Kern, Banafsheh Abasahl

2010

Full-wave analysis of photonic-crystal structures with multi quantum well active region

Banafsheh Abasahl

In this paper, a semi-classical formulation for modeling photonic-crystal (PC) structures with a four-layer multi quantum well (MQW) active region is presented. The formulation treats the electromagnetic fields as a classical entity, while employing the qu ...

2010