Publications de Krishnan Thyagarajan

Periodic Motion of Sedimenting Flexible Knots

Giovanni Dietler, Andrzej Stasiak, Krishnan Thyagarajan

We study the dynamics of knotted deformable closed chains sedimenting in a viscous fluid. We show experimentally that trefoil and other torus knots often attain a remarkably regular horizontal toroidal structure while sedimenting, with a number of intertwi ...

APS2018

Highly Improved Fabrication of Ag and Al Nanostructures for UV and Nonlinear Plasmonics

Christian Santschi, Philippe Langlet, Olivier Martin, Krishnan Thyagarajan

Wiley-V C H Verlag Gmbh2016

A new fabrication method for aluminium and silver plasmonic nanostructures

Christian Santschi, Olivier Martin, Krishnan Thyagarajan

2014

A New Fabrication Method for Aluminum and Silver

Christian Santschi, Olivier Martin, Krishnan Thyagarajan

2014

Second harmonic generation from fano metamolecules: A new route for highly sensitive 3D nonlinear plasmon rulers

Olivier Martin, Krishnan Thyagarajan, Jérémy Butet

2014

Nonlinear Plasmonics : Engineering Nanostructures for Efficient Second Harmonic Generation

Krishnan Thyagarajan

EPFL2014

Augmenting Second Harmonic Generation Using Fano Resonances in Plasmonic Systems

Olivier Martin, Krishnan Thyagarajan, Jérémy Butet

Significant augmentation of second harmonic generation using Fano resonances in plasmonic heptamers made of silver is theoretically and experimentally demonstrated. The geometry is engineered to simultaneously produce a Fano resonance at the fundamental wa ...

American Chemical Society (ACS)2013

Second-harmonic generation from periodic arrays of arbitrary shape plasmonic nanostructures: a surface integral approach

Olivier Martin, Benjamin Gallinet, Krishnan Thyagarajan, Jérémy Butet

A surface integral formulation for the second-harmonic generation (SHG) from periodic metallic-dielectric nano-structures is described. This method requires the discretization of the scatterers' surface in the unit cell only. All the physical quantities in ...

Optical Soc Amer2013

Engineering absorption losses in plasmonic nanostructures

Theo Lasser, Olivier Martin, Krishnan Thyagarajan, Banafsheh Abasahl

2013

Ultrasensitive Optical Shape Characterization of Gold Nanoantennas Using Second Harmonic Generation

Olivier Martin, Krishnan Thyagarajan, Jérémy Butet

Second harmonic generation from plasmonic nanoantennas is investigated numerically using a surface integral formulation for the calculation of both the fundamental and the second harmonic electric field. The comparison between a realistic and an idealized ...

American Chemical Society (ACS)2013

Influencing the ultrafast plasmon damping time using Fano resonances for nonlinear plasmonics

Olivier Martin, Krishnan Thyagarajan

We explore the possibility of strongly influencing the plasmon damping time in nanostructures for efficient second harmonic generation, by taking advantage of the tunability of the narrow linewidth feature in the extinction cross-section exhibited by plasm ...

E D P Sciences2013

High yield and high quality nanofabrication of silver and aluminium plasmonic nanostructures

Christian Santschi, Olivier Martin, Krishnan Thyagarajan

2013

Role of symmetry in the second harmonic generation from realistic gold nanoantennas

Olivier Martin, Krishnan Thyagarajan, Jérémy Butet

2013

Enhanced second-harmonic generation from double resonant plasmonic antennae

Simon Rivier, Olivier Martin, Krishnan Thyagarajan, Andrea Lovera

We present a novel plasmonic antenna geometry - the double resonant antenna (DRA) - that is optimized for second-harmonic generation (SHG). This antenna is based on two gaps coupled to each other so that a resonance at the fundamental and at the doubled fr ...

2012

Nonlinear plasmonics of metallic heptamers

Simon Rivier, Olivier Martin, Krishnan Thyagarajan

Second-harmonic generation (SHG) from centrosymmetric nanostructures originating from the breaking of inversion symmetry at their surfaces is a well-known phenomenon and is extensively used as a surface probe in nonlinear optical microscopy. In recent year ...

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

Influence of the ultrafast plasmon damping time on nonlinear plasmonics

Olivier Martin, Krishnan Thyagarajan

2012

Enhanced second-harmonic generation from nanoantennas with double resonances

Simon Rivier, Olivier Martin, Krishnan Thyagarajan, Andreas Kern, Andrea Lovera

2011