Tracking nanoscale perturbation in active disordered media

Renu Yadav; Patrick Sebbah; Maruthi M. Brundavanam; Shivakiran Bhaktha B. N

doi:10.1103/PhysRevA.107.023513

Tracking nanoscale perturbation in active disordered media

Renu Yadav, Patrick Sebbah, Maruthi M. Brundavanam, Shivakiran Bhaktha B. N

Department of Physics

Indian Institute of Technology Kharagpur

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Disorder-induced feedback makes random lasers very susceptible to any changes in the scattering medium. The sensitivity of the lasing modes to perturbations in the disordered systems has been utilized to map the regions of perturbation. A tracking parameter that takes into account the cumulative effect of changes in the spatial distribution of the lasing modes of the system has been defined to locate the region in which a scatterer is displaced by a few nanometers. We show numerically that the precision of the method increases with the number of modes. The proposed method opens up the possibility of application of random lasers as a tool for monitoring locations of nanoscale displacement, which can be useful for single-particle detection and monitoring.

Original language	English
Article number	023513
Journal	Physical Review A
Volume	107
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.107.023513
State	Published - Feb 2023

Bibliographical note

Publisher Copyright:
© 2023 American Physical Society.

Funding

The authors acknowledge Jonathan Andreasen, Georgia Tech Research Institute, and Anirban Sarkar, National Institute of Technology, Calicut, for fruitful discussions and help in computation. We acknowledge support from the Science and Engineering Research Board via sponsered Project No. CRG/2020/002650. The DST-FIST facility, Department of Physics, IIT Kharagpur, is acknowledged for computational support. We acknowledge the National Supercomputing Mission (NSM) for providing the computing resources of PARAM Shakti at IIT Kharagpur, which is implemented by C-DAC and supported by the Ministry of Electronics and Information Technology (MeitY), Department of Science and Technology (DST), Government of India. The Israel Science Foundation (Grants No. 1871/15, No. 2074/15, and No. 2630/20) and the United States-Israel Binational Science Foundation NSF/BSF (Grants No. 2015694 and No. 2021811) are acknowledged.

Funders	Funder number
Department of Science and Technology, Ministry of Science and Technology, India
United States-Israel Binational Science Foundation	2015694, 2021811
Science and Engineering Research Board	CRG/2020/002650
Israel Science Foundation	2074/15, 1871/15, 2630/20
Ministry of Electronics and Information technology

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Tracking nanoscale perturbation in active disordered media

Abstract

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