National Level Examination Qualified
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CSIR NET(LS): JUNE 2015 (All India Rank 26)
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CSIR NET(JRF): DEC 2015 (All India Rank 112)
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GATE: 2014, 2015
Fellowships/Awards
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BHU RET Fellowship 2014
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RFSMS Meritorious Fellowship (BSR - UGC) 2015
Ph.D. Information
Ph.D. Research Topic "Studies on Photonic Band Gap Generation and Tunability in Lithium Niobate Slab Utilizing GHz Lamb Waves"
Supervisor Dr. Vivek Singh, Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005
Thesis Submission May 2019
Degree Awarded Dec 2019
Research Interest
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Computational Photonics, Applied Optics, Electromagnetic Wave Propagation in Multilayer Structures, Acoustic Wave Propagation in Photonic Structure, Computational Acoustics, Acousto – Optic Interactions, Optical Waveguides.
Scientific Skills Expertise
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MATLAB – Computing and Programming
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FORTRAN – Programming
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Origin – Scientific Graphing and Data Analysis
Details of Ph.D. Research Work
Structures with special refractive index arrangement have tendency to alter the electromagnetic (EM) flow. These structures with alternate low-high refractive index arrangement can control the EM wave propagation and are known as photonic crystals. The low-high refractive index arrangement creates a forbidden band gap (similar to the electronic band gap in solids, created by periodic potentials), that do not allow a particular range of EM frequency to flow through the structure. Tuning the refractive index of these structures leads to tunable photonic crystals.
In my Ph.D. work I have focused on tuning the photonic band gap by manipulating the refractive index of material through acoustic waves of GHz frequencies. I have theoretically showed that the one dimensional photonic crystals can be produced in homogeneous slabs by the action of acoustic waves (density waves). This is achieved by the application of Lamb waves (a special acoustic wave). The fundamental symmetric Lamb mode perturbation in slab leads to sinusoidal refractive index modulation along the wave propagation direction. The framework, modeling and calculations have been done on MATLAB platform.
The altered refractive index along the direction of Lamb wave behaves like a low high refractive index arrangement. The generated one dimensional photonic structure is acoustically tunable. Here in this structure, created forbidden band gaps depend on acoustic wave's frequencies. The range of forbidden band gaps of interest can be produced and tuned by selecting slab material, slab thickness and in few cases slab orientation. Since the electromagnetic energy flow and the perturbing cause (acoustic waves) reside inside the slab, they do not affect the nearby environment. Such acoustically tunable photonic crystals are thus of great interest that can be used without affecting the surroundings and helpful in sophisticated sensing.
School/Training
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SERB School on Modern Optics and Its Applications, 30 Nov. 2015 – 18 Dec. 2015, Department of Physics, IIT Patna, Patna, Bihar.
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Short term course on FEM & workshop on Smart Materials & Structures, 25 July 2016 – 29 July 2016, School of Engineering, IIT Mandi, H.P.
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SERB School on Frontiers in Quantum Optics, 01 Dec. 2017 – 19 Dec. 2017, Department of Physics, IIT Guwahati, Guwahati, Assam.
Teaching/Research Experience
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S.NO. |
Designation |
Institute/University |
Teaching Period |
Nature of Duties |
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1 |
Assistant Professor |
Department of Physics, GLA University, Mathura (U.P.) |
Aug 2019 to Till Now |
Teaching at UG and PG level. |
Administrative Activities/ Awards/ Duties
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M.Sc. Physics II Year Electronics Lab Incharge for session 2020-21 and 2021-22.
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Organizing Secretary of the Faculty Development Program on Exploring the Black Hole Solutions in Modified Gravity organized by Department of Physics, GLA University, Mathura during August 23-29, 2021.
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Excellence in Class Room Teaching Award on the basis of student feed back in academic session 2019-20.