A. Krishnan
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View article: On-axis structured beams generation via moiré and Mie resonant metallo-dielectric moiré gratings
On-axis structured beams generation via moiré and Mie resonant metallo-dielectric moiré gratings Open
View article: Uniform dipole resonance and suppressed quadrupole resonance for constant transmittivity full phase control plasmonic metasurfaces
Uniform dipole resonance and suppressed quadrupole resonance for constant transmittivity full phase control plasmonic metasurfaces Open
View article: A simulation-based analysis of optical read-out for electrochemical reactions using composite vortex beams
A simulation-based analysis of optical read-out for electrochemical reactions using composite vortex beams Open
View article: Thickness-Dependent Nonlinear Electrical Conductivity of Few-Layer Muscovite Mica
Thickness-Dependent Nonlinear Electrical Conductivity of Few-Layer Muscovite Mica Open
We report on the direct current (dc) current-voltage ($I$-$V$) characteristics of few-layer muscovite mica (MuM) flakes exfoliated and transferred onto $\mathrm{Si}\mathrm{O}$${}_{2}$/$\mathrm{Si}$ substrate, under different substrate dc b…
View article: Single-shot generation of composite optical vortex beams using hybrid binary fork gratings
Single-shot generation of composite optical vortex beams using hybrid binary fork gratings Open
We design and experimentally demonstrate a simple, single-shot method for the generation of arbitrary composite vortex (CV) beams using hybrid binary fork gratings (hBFG). These gratings were computationally generated by removing the centr…
View article: Stacking angle dependent multiple excitonic resonances in bilayer tungsten diselenide
Stacking angle dependent multiple excitonic resonances in bilayer tungsten diselenide Open
We report on multiple excitonic resonances in bilayer tungsten diselenide (BL-WSe 2 ) stacked at different angles and demonstrate the use of the stacking angle to control the occurrence of these excitations. BL-WSe 2 with different stackin…
View article: Near Infrared Random Lasing in Multilayer MoS<sub>2</sub>
Near Infrared Random Lasing in Multilayer MoS<sub>2</sub> Open
We demonstrated room temperature near infrared (NIR) region random lasing (RL) (800-950 nm), with a threshold of nearly 500 μW, in ∼200 nm thick MoS2/Au nanoparticles (NPs)/ZnO heterostructures using photoluminescence spectrosco…
View article: On-chip label-free plasmonic based imaging microscopy for microfluidics
On-chip label-free plasmonic based imaging microscopy for microfluidics Open
In this work, we demonstrated an on-chip label-free imaging microscopy using real and Fourier Plane (FP) dark field images of surface plasmons, by integrating engineered plasmonic substrates with different shapes of microfluidic channels. …
View article: On-chip label-free plasmonic based imaging microscopy for microfluidics
On-chip label-free plasmonic based imaging microscopy for microfluidics Open
In this work, we demonstrated on-chip label-free imaging microscopy using real and Fourier Plane (FP) microscopic dark field images of Surface Plasmons (SP), excited on engineered 1D and 2D low aspect ratio periodic plasmonic nanostructure…