Debanjan Polley open



Debanjan Polley

Postdoctoral Researcher

Research Advisor: Prof. Jeffrey Bokor

BETR Research Thrust: Embedded Memory


Debanjan Polley is an Indian national who is currently working as a postdoctoral researcher with Prof. Jeffrey Bokor at University of California, Berkeley. Previously, he worked as a postdoctoral researcher with Dr. Stefano Bonetti at Stockholm University, Sweden, and investigated strong THz pulse induced ultrafast magnetization dynamics in ferromagnets and studied THz metamaterials. He did his Ph.D. from India on THz spectroscopy of metallic nanostructures. In his free time, he reads historical fictions and crime thrillers. He loves exploring new places and trying out new cuisines. He is a passionate trekker, who has trekked many times in the Indian Himalayas.


A magnetization state of a Gd based ferrimagnet alloy can be switched by exchange interaction, however for A ferromagnet can be switched by ultrafast spin-current or due to RKKY mediated exchange with another ferrimagnet layer and the timescales varies between couples of ~ps to hundreds of pico-second. I am currently involved in time-resolved magnetization dynamics measurement in such ferro/ferri-magnetic structures using ultrafast electrical and optical excitation and trying to figure out the fastest possible switching mechanism which can be integrated into an MRAM. I am also perusing theoretical analysis of ultrafast switching using microscopic (Python) and micromagnetic (OOMMF) simulation.

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