Frontiers of quantum physics

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A Microscopic Quantum Model For the Experiment Coupling Qubits to a Tardigrade

(2021)

Entanglement between superconducting qubits and a tardigrade

(2021)

Authors:

KS Lee, YP Tan, LH Nguyen, RP Budoyo, KH Park, C Hufnagel, YS Yap, N M酶bjerg, V Vedral, T Paterek, R Dumke

Single molecule surface enhanced Raman scattering in a single gold nanoparticle-driven thermoplasmonic tweezer

The Journal of Physical Chemistry Letters 12 (49), 11910-11918

Authors:

Sunny Tiwari, Utkarsh Khandelwal, Vandana Sharma, GV Pavan Kumar

Abstract:

Spin, Statistics, Spacetime and Quantum Gravity

(2021)

Authors:

Chiara Marletto, Vlatko Vedral

Mirror-enhanced directional out-coupling of SERS by remote excitation of a nanowire-nanoparticle cavity

Journal of Optics United Kingdom 23:12 (2021)

Authors:

S Tiwari, AB Vasista, D Paul, GVP Kumar

Abstract:

We report on the experimental observation of mirror-enhanced directional surface-enhanced Raman scattering (SERS) from a self-assembled monolayer of molecules coupled to a nanowire-nanoparticle (NW-NP) junction on a mirror in a remote excitation configuration. Placing the NW-NP junction on a metallic mirror generates multiple gap plasmon modes that have unique momentum space-scattering signatures. We perform Fourier plane imaging of the SERS from the NW-NP on a mirror to understand the effect of multiple hotspots on molecular emission. We systematically study the effect of the ground plane on the directionality of emission from the NW-NP junction and show that the presence of a mirror drastically reduces the angular spread of emission. The effect of multiple hotspots in the geometry on the directionality of the molecular emission is studied using 3D numerical simulations. The results presented here will have implications in understanding plasmon hybridization in the momentum space and its effects on molecular emission.