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8. Anomalous Lasing Behavior in a Nonlinear Plasmonic Random Laser

Author

Yadav, Renu, Pal, Sourabh, Jana, Subhajit, Ray, Samit K., Brundavanam, Maruthi M., and N, Shivakiran Bhaktha B.

Subjects
Physics - Optics
Abstract

An unprecedented double-threshold lasing behavior has been observed in a plasmonic random laser composed of Au nanoislands decorated on vertically standing ZnO nanorods, infiltrated with dye-doped polymer matrix. The strong coupling of random laser modes to plasmonic nanocavities results in a dominant absorption of the random laser emission, leading to the first unusual lasing threshold. At higher pump fluences, the nonlinear optical behavior of the Au nanoislands induces a second lasing threshold. Various statistical tools have been employed to analyze the intensity fluctuations of the random laser modes, validating this unique lasing behavior.

Published
2024

23. Tracking nanoscale perturbation in active disordered media

Author

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

Subjects
Physics - Optics
Abstract

The 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 have 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., Comment: 7 pages, 6 figures

Published
2022
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35. Utility of an in-house real-time PCR in whole blood samples as a minimally invasive method for early and accurate diagnosis of invasive mould infections.

Author

Pandey, Mragnayani, Xess, Immaculata, Sachdev, Janya, Sharad, Neha, Gupta, Sonakshi, Singh, Gagandeep, Yadav, Renu Kumari, Rana, Bhaskar, Raj, Stephen, Ahmad, M.Nizam, Nityadarshini, Neha, Baitha, Upendra, Soneja, Manish, Shalimar, Prakash, Bindu, Sikka, Kapil, Mathur, Purva, Jyotsna, Viveka P., Kumar, Rakesh, Wig, Naveet, Gourav, Sudesh, Biswas, Ashutosh, and Thakar, Alok

Published
2024
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46. Leadership and Gender: An Exploration of Two Female Administrators' Leadership Experiences in India

Author

Yadav, Renu and Lata, Priti

Abstract

Administrative leadership, both within and outside educational contexts, remains a male-centric field. Female leaders often are evaluated based on male leadership characteristics, a practice particularly evident in India's education sector. In India, only 35% of academics are women and even fewer are represented in leadership positions. This paper explores the experiences of two women working in administrative leadership positions in two Indian high schools. Interviews and questionnaires provided insight into how they perceived their opportunities, experienced barriers, and understood the impact of gender discrimination on their lives. The findings of this study are anticipated to encourage and provide insights to women who may aspire to assume academic leadership positions in education.

Published
2018

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