Publications by Christian Santschi

An unconventional take on plasmonic metasurfaces

Christian Santschi, Olivier Martin, Jeonghyeon Kim

The immense potential of optical metasurfaces is showcased by demonstrating several state-of-the-art applications with plasmonic metasurfaces along with experimental investigation of their polarization response using Mueller matrix spectroscopy. The work o ...

SPIE2024

A Low-Temperature Annealing Method for Alloy Nanostructures and Metasurfaces: Unlocking a Novel Degree of Freedom

Christian Santschi, Olivier Martin, Debdatta Ray, Jeonghyeon Kim, Hsiang-Chu Wang

The material and exact shape of a nanostructure determine its optical response, which is especially strong for plasmonic metals. Unfortunately, only a few plasmonic metals are available, which limits the spectral range where these strong optical effects ca ...

Wiley-V C H Verlag Gmbh2022

Controlling surface effects in extremely high aspect ratio gold plasmonic electrodes

Christian Santschi, Olivier Martin, Marco Riccardi

Nanofabrication is key to many technological advances, especially the challenge of merging nanophotonics with electronics. Here, we investigate the fabrication process of plasmonic interdigitated gold electrodes having a very high aspect ratio (i.e. long a ...

ELSEVIER2022

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

Design and fabrication strategies of complex plasmonic structures for trapping and sensing applications

Christian Santschi, Olivier Martin, Marco Riccardi

2021

Reliable Langmuir Blodgett colloidal masks for large area nanostructure realization

Christian Santschi, Olivier Martin, Madasamy Thangamuthu

The fabrication of highly ordered nanostructures over large areas is key for many technologies and colloidal lithography using the Langmuir Blodgett technique appears a simple and straightforward way of reaching that goal. While this technique has been wid ...

2020

Hybrid Metal-Dielectric Metasurfaces for Refractive Index Sensing

Christian Santschi, Olivier Martin, Raziman Thottungal Valapu, Hatice Altug, Dordaneh Etezadi, Debdatta Ray

Hybrid metal-dielectric nanostructures have recently gained prominence because they combine strong field enhancement of plasmonic metals and the several low-loss radiation channels of dielectric resonators, which are qualities pertaining to the best of bot ...

AMER CHEMICAL SOC2020

Extending the limits of conventional plasmonics with low temperature alloying of noble metals

Christian Santschi, Olivier Martin, Debdatta Ray, Jeonghyeon Kim, Hsiang-Chu Wang

2020

High-quality single crystal diamond diffraction gratings fabricated by crystallographic etching

Christian Santschi, Niels Quack, Olivier Martin, Toralf Scharf, Marcell Kristof Kiss, Teodoro Graziosi

We demonstrate a novel method for fabricating single crystal diamond diffraction gratings based on crystallographic etching that yields high-quality diffraction gratings from commercially available diamond plates. Both V-groove and rectangular gratin ...

2019

Photocatalytic ammonia production enhanced by a plasmonic near-field and hot electrons originating from aluminium nanostructures

Christian Santschi, Olivier Martin, Madasamy Thangamuthu

Ammonia production at room temperature and atmospheric pressure is in high demand to assist in energy saving and the protection of the environment worldwide, as well as to help reduce CO2 emissions. Recently, plasmonic nanomaterials have been frequently us ...

2019

Electrochemical Sensor for Bilirubin Detection Using Screen Printed Electrodes Functionalized with Carbon Nanotubes and Graphene

Christian Santschi, Olivier Martin, Madasamy Thangamuthu

2018

Label-Free Electrochemical Immunoassay for C-Reactive Protein

Christian Santschi, Olivier Martin, Madasamy Thangamuthu

2018

Size control of self-organized gold nanoparticles on nanopatterned single crystal diamond

Christian Santschi, Niels Quack, Olivier Martin, Marcell Kristof Kiss, Sichen Mi

Surface patterning using plasmonic nanoparticles has attracted increasing interest owing to their wide use in sensing, imaging and medical applications. In this report we demonstrate bottom-up engineering of size distribution of gold nanoparticles (AuNPs) ...

IEEE2018

Hybrid Metallodielectric Metasurfaces for Sensing

Christian Santschi, Olivier Martin, Debdatta Ray

We have fabricated metasurfaces that combine silicon resonators with aluminium disks. While the latter produce strong near-field enhancement, the former support optical resonances that can be used to obtain well-controlled far-field signatures. ...

IEEE2018

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

Full Color Generation Using Silver Tandem Nanodisks

Christian Santschi, Olivier Martin, Hua Zhao, Chen Yan, Jingwen Zhang, Xiaolong Wang

Plasmonic effects associated with metallic nanostructures have been widely studied for color generation. It became apparent that highly saturated and bright colors are hard to obtain, and very small nanostructures need to be fabricated. To address this iss ...

2017

Non-invasive continuous monitoring of pro-oxidant effects of engineered nanoparticles on aquatic microorganisms

Paul Bowen, Christian Santschi, Olivier Martin, Volodymyr Koman, Nadia Rachel Von Moos

Engineered nanomaterials (ENMs) are key drivers for the development of highly sophisticated new technologies. As all new attainments, the rapidly increasing used of ENMs raise concerns about their safety for the environment and humans. There is growing evi ...

2017

Highly sensitive SERS analysis of the cyclic Arg-Gly-Asp peptide ligands of cells using nanogap antennas

Christian Santschi, Olivier Martin, Alejandro Ernesto Portela Otano

The cyclic RGD (cRGD) peptide ligands of cells have become widely used for treating several cancers. We report a highly sensitive analysis of c(RGDfC) using surface enhanced Raman spectroscopy (SERS) using single dimer nanogap antennas in aqueous environme ...

2017

Strong Improvement of Long-Term Chemical and Thermal Stability of Plasmonic Silver Nanoantennas and Films

Christian Santschi, Olivier Martin, Xiaolong Wang

Silver (Ag) nanostructures and thin films are advantageous plasmonic materials as they have significantly lower losses than gold (Au). Unfortunately, Ag nanostructures suffer from poor chemical and thermal stability, which limit their applications. Here, t ...

Wiley-V C H Verlag Gmbh2017

New insights into ROS dynamics: a multi-layered microfluidic chip for ecotoxicological studies on aquatic microorganisms

Christian Santschi, Olivier Martin, Volodymyr Koman, Nadia Rachel Von Moos

Reactive oxygen species (ROS) play an important role in the life of every cell, including cellular defense and signaling mechanisms. Continuous and quantitative ROS sensing can provide valuable information about the cell state, but it remains a challenge t ...

Informa Healthcare2016