N
Nirmal K. Viswanathan
Researcher at University of Hyderabad
Publications - 113
Citations - 2391
Nirmal K. Viswanathan is an academic researcher from University of Hyderabad. The author has contributed to research in topics: Polarization (waves) & Beam (structure). The author has an hindex of 21, co-authored 97 publications receiving 2134 citations. Previous affiliations of Nirmal K. Viswanathan include Facultad de Ciencias Exactas y Naturales & Center for Advanced Materials.
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Journal ArticleDOI
Surface relief structures on azo polymer films
Nirmal K. Viswanathan,Dong-Yu Kim,Shaoping Bian,John Williams,Wei Liu,Lian Li,Lynne A. Samuelson,Jayant Kumar,Sukant K. Tripathy +8 more
TL;DR: In this article, the design and synthesis of several classes of suitable azobenzene functionalized polymers for the surface relief grating (SRG) formation process is discussed and experimental studies are carried out to understand the chemical and physical intricacies involved in the SRG formation process.
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A Detailed Investigation of the Polarization-Dependent Surface-Relief-Grating Formation Process on Azo Polymer Films
TL;DR: In this article, two-beam interference experiments were carried out to form surface-relief gratings (SRGs) on azo polymer films under different polarization combinations, and it was shown that SRG formation on azobenzene chromophore functionalized polymer films has been shown to depend on both the spatial variation of the intensity as well as the polarization state of the incident field pattern.
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Photofabrication of Surface Relief Grating on Films of Azobenzene Polymer with Different Dye Functionalization
Takashi Fukuda,Hiro Matsuda,Takao Shiraga,Tatsumi Kimura,Masao Kato,Nirmal K. Viswanathan,Jayant Kumar,Sukant K. Tripathy +7 more
TL;DR: In this paper, the authors examined the influence of three important parameters: the degree of azo functionalization, the irradiating light intensity, and the initial film thickness on the writing behavior of surface relief grating.
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Spin-Hall effect and circular birefringence of a uniaxial crystal plate
Konstantin Y. Bliokh,C. T. Samlan,Chandravati Prajapati,Graciana Puentes,Nirmal K. Viswanathan,Franco Nori +5 more
TL;DR: In this article, the spin-Hall effect of light has been shown to be a transverse spin-dependent shift of the paraxial light beam transmitted through the plate, which is a novel example of the spin Hall effect of energy.
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Azo Polymer Multilayer Films by Electrostatic Self-Assembly and Layer-by-Layer Post Azo Functionalization
Soo-Hyoung Lee,Srinivasan Balasubramanian,Dong-Yu Kim,Nirmal K. Viswanathan,Shaoping Bian,Jayant Kumar,Sukant K. Tripathy +6 more
TL;DR: In this paper, the development of a novel method for molecular level assembly and processing of multilayer azo polymer films is described. But the method is not suitable for the processing of poly(acrylic acid)-based precursor anilino functional polymer.