Dr Sunny Tiwari: Publications

Ultraviolet nanophotonics enables autofluorescence correlation spectroscopy on label-free proteins with a single tryptophan

Nano Letters 23 (2), 497-504

Authors:

Prithu Roy, Jean-Benoît Claude, Sunny Tiwari, Aleksandr Barulin, Jérôme Wenger

Abstract:

Mirror-coupled microsphere can narrow the angular distribution of photoluminescence from ws2 monolayers

Applied Physics Letters 120 (26)

Authors:

Shailendra K Chaubey, Sunny Tiwari, Gokul MA, Diptabrata Paul, Atikur Rahman, GV Pavan Kumar

Abstract:

Directing monolayer tungsten disulfide photoluminescence using a bent-plasmonic nanowire on a mirror cavity

The European Physical Journal Special Topics 231 (4), 807-813

Authors:

Shailendra K Chaubey, Sunny Tiwari, Ashutosh Shukla, MA Gokul, Atikur Rahman, GV Pavan Kumar

Abstract:

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:

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.

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Dr Sunny Tiwari

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Ultraviolet nanophotonics enables autofluorescence correlation spectroscopy on label-free proteins with a single tryptophan

Authors:

Abstract:

Mirror-coupled microsphere can narrow the angular distribution of photoluminescence from ws2 monolayers

Authors:

Abstract:

Directing monolayer tungsten disulfide photoluminescence using a bent-plasmonic nanowire on a mirror cavity

Authors:

Abstract:

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

Authors:

Abstract:

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

Authors:

Abstract:

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Dr Sunny Tiwari

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Ultraviolet nanophotonics enables autofluorescence correlation spectroscopy on label-free proteins with a single tryptophan

Authors:

Abstract:

Mirror-coupled microsphere can narrow the angular distribution of photoluminescence from ws2 monolayers

Authors:

Abstract:

Directing monolayer tungsten disulfide photoluminescence using a bent-plasmonic nanowire on a mirror cavity

Authors:

Abstract:

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

Authors:

Abstract:

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

Authors:

Abstract: