JIIT

Academic Experts

Dr. Anshu Dhirendra Varshney

Associate Professor

anshudhirendra.varshney@mail.jiit.ac.in

Biography

Dr. Anshu Dhirendra Varshney is an Associate Professor (Physics & Materials Science & Engineering) at Jaypee Institute of Information Technology (JIIT), Noida, where she has been a faculty since December 2011. She earned her Ph.D. from the University of Delhi in 2010, undertaking a doctoral thesis entitled “Numerical & Analytical Studies of Photonic Crystal Fiber & its Devices”. Prior to this, she obtained her postgraduate degree in science from IIT Delhi and taught as Assistant Professor in the Physics Department at IPEC, Sahibabad (GBTU) before joining JIIT.

Dr. Varshney’s research interests span photonic crystal-based sensors, electron acceleration via surface plasma waves, organic and nonlinear photonics, biomedical photonics, high-speed optical communications, and nano-photonics. She has contributed to over twenty peer-reviewed publications, including journal articles, conference proceedings, and several book chapters—such as a chapter on nanomaterials architecture in perovskite solar cells published by Springer in 2022. She also co-authored studies on electron acceleration and dispersion relations of surface plasma waves featured in international symposia.

With over 14 years of teaching experience, Dr. Varshney continues to explore cutting-edge research in photonics and nano-structured optical devices, while guiding budding researchers in the interdisciplinary landscape of applied physics.

Research Highlights

Dr. Anshu D. Varshney’s research is built entirely on predictive theoretical and simulation-based approaches, demonstrating expertise in electromagnetic modelling, finite-difference time-domain (FDTD) simulation, and dispersion theory. She models 2D photonic-crystal racetrack ring resonators to forecast resonance-wavelength shifts caused by minute refractive-index changes in analytes, achieving high sensitivities and quality factors for distinguishing bacterial, viral, cancerous, and tumour cell refractive-index signatures. Her silicon microring resonator models, using optimized 2D photonic-crystal geometries, simulate hormonal biomarkers (e.g. HCG, progesterone, estradiol) in body fluids by linking refractive-index variation to spectral shifts in transmission spectra. In oncology diagnostics, her FDTD-based ring-resonator configurations have been calibrated to differentiate cancer cell clusters from normal cells by quantifying subtle refractive-index contrasts in tissue models. Complementing this, she develops analytical and numerical models of surface plasmon wave–induced electron acceleration in Kretschmann geometries under static magnetic fields, deriving scaling laws that show electrons can gain tens to hundreds of keV via SPW and cyclotron coupling. In the realm of plasmonic photovoltaics, her wave-transfer matrix and FDTD simulations explore the effect of copper nanoparticle morphology embedded in perovskite films on light absorption—predicting absorbance enhancements on par with noble metals but at reduced cost. Together, these studies integrate parametric sweeps, dispersion engineering, and electromagnetic-wave theory into unified device-performance forecasts, establishing her as a computational physicist in photonic-plasmonic biosensors, renewable-energy architecture, and wave-matter interaction.

Areas Of Interest

Photonics
Photonic crystals
Plasmonics
Nanostructured Materials
Device-Oriented Biosensing and Perovskite Solar-cell

Publications

A. Sahoo and A. D. Varshney, “Detection of viral and bacterial diseases using 2D photonic crystal‑based racetrack ring resonator sensor,” J. Nanophoton., vol. 17, no. 2, Art. no. 026004, pp. 1–11, Feb. 2023.
A. Sahoo and A. D. Varshney, “Modelling of silicon ring resonator sensor for the detection of hormonal disorders in the human body,” Opt. Quantum Electron., vol. 55, no. 12, Art. no. 1068, pp. 1–16, Sept. 2023.
A. Sahoo and A. D. Varshney, “Detection of different cancer and tumour cells using 2D photonic crystal‑based ring resonator,” J. Opt., vol. 55, no. 3, pp. 1–6, Oct. 2023.
S. Sahai and A. Varshney, “The effect of morphologies of embedded plasmonic Cu‑nanoparticles on solar absorption of perovskite solar cells: A comprehensive study,” Opt. Spectroscopy, vol. 129, no. 8, pp. 1201–1208, Dec. 2021.
S. Sahai and A. Varshney, “Solar absorbance enhancement in perovskite solar cells with the inclusion of copper nanoparticles: an architectural study,” Opt. Quantum Electron., vol. 53, Art. no. 111, 2021.