Danish Furekh Dar

Kullar, Pahalgam

Anantnag, Jammu and Kashmir 192401

“Behind every atom of this world hides an infinite Universe.” — Rumi

About

I am a theoretical physicist and doctoral researcher specializing in strong-field and laser–matter interactions, with a particular focus on above-threshold ionization (ATI) and non-dipole effects in intense laser fields. I completed my PhD at Friedrich Schiller Universität Jena and the Helmholtz Institute, where my research centered on understanding electron dynamics under high-intensity few-cycle laser pulses using analytical and semi-classical approaches.

My work primarily employs the strong-field approximation (SFA), Jacobi–Anger expansion, and the saddle-point method, alongside numerical and computational techniques, to investigate photoelectron momentum distributions and nonlinear interference effects. I have contributed to several peer-reviewed publications in leading journals, including Physical Review A and Journal of Physics B: Atomic, Molecular and Optical Physics, exploring both dipole and non-dipole regimes of strong-field ionization.

Currently, my research interests extend to strong-field QED and advanced laser–matter interaction theories, with an emphasis on developing accurate theoretical models that bridge analytical insight and computational efficiency.

More details about my academic output, publications, and presentations can be found on my website.

Use the menu at the top to navigate through my publications, talks, and research activities.

Interests	Education
Strong-Field and Laser–Matter Interaction Above-Threshold Ionization (ATI) Non-Dipole and Relativistic Effects Theoretical Atomic Physics Scientific Computing & Numerical Methods	PhD in Physics, 2025 Friedrich Schiller Universität Jena & Helmholtz Institute, Germany Master of Science in Physics, 2021 Guru Nanak Dev University, Amritsar, India Bachelor of Science in Physics, 2019 Guru Nanak Dev University, Amritsar, India

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This website brings together my scientific work, research updates, and personal reflections as I move into the next chapter of my career.

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Jul 23, 2025	Molecular mechanisms of unique therapeutic potential of CUDC-907 for MEF2D fusion-driven BCP-ALL has been published in Signal Transduction and Targeted Therapy.
Nov 20, 2024	I forgot to mention that Hongxin has published a preview titled Finish the unfinished: Chd1 resolving hexasome-nucleosome complex with FACT on 19 September.
Dec 01, 2023	I am delighted to share that the manuscript titled Transcription factor 12 mediated self-feedback regulatory mechanism is required in DUX4 fusion leukemia has been accepted by the esteemed journal, Clinical and Translational Medicine (CTM), following an extensive review and revision process spanning nearly two years. I would like to express my sincere gratitude to Dr Zhihui Li, one of the co-authors, for her invaluable assistance. Without her contributions, I believe it would not have been possible for us to have this entire story accepted by CTM.

Selected publications

Photoionization dynamics in intense few-cycle twisted laser pulses

Danish Furekh Dar, Anne Weber, Shreyas Ramakrishna, and Stephan Fritzsche

Phys. Rev. A, May 2025

DOI
Comparison between Jacobi–Anger and saddle point methods to treat above-threshold ionization

Danish Furekh Dar and Stephan Fritzsche

Journal of Physics B: Atomic, Molecular and Optical Physics, Nov 2025

Abs DOI

We present a detailed comparison of theoretical approaches for modeling strong-field ionization by few-cycle laser pulses. The dipole approximation is shown to accurately capture interference structures in photoelectron spectra, while non-dipole effects introduce significant momentum shifts along the propagation direction. Two complementary analytical methods are used: the Jacobi–Anger expansion provides complete spectral decomposition of transition amplitudes, whereas the saddle-point method efficiently identifies dominant ionization pathways. Through this comparative study within the strong-field approximation framework, we establish validity conditions and practical advantages for each approach. Our results provide guidelines for selecting theoretical methods for advancing the interpretation of strong-field processes. These findings provide a roadmap for interpreting strong-field ionization spectra and momentum distributions, highlighting where non-dipole effects and method choice critically alter predictions.
Nonlinear interference and electron dynamics: Probing photoelectron momentum distributions in strong-field ionization

Danish Furekh Dar and Stephan Fritzsche

Phys. Rev. A, Apr 2024

DOI
Nondipole strong-field approximation for above-threshold ionization in a few-cycle pulse

Danish Furekh Dar, Björn Minneker, and Stephan Fritzsche

Phys. Rev. A, May 2023

DOI