Avulu Vinod Kumar
Postdoctoral Research Fellow
Latest Results!!!
Integrating FIB-milled disk resonators with flexible waveguides
A Tandem Approach to Fabricate a Hybrid, Organic-Add-Drop Filter Using Focused Ion Beam Milling-assistred Single-Crystal Disk-Resonators and Atomic Force microscopy-driven Pseudo-Plastic Crystal Waveguides.
Laser Photonics & Rev. 2024, 17, 2300552
Shaping of 1D organic crystal into 2D/3D waveguide
Light-assisted shaping of 1D organic crystals waveguide into 2D or 3D waveguide on a substrate or free space, respectively. The photoisomerization-induced crystalline to amorphous phase transformation allows laser-assisted mechanical bending of organic crystal on a 2D plane or 3D free space to demonstrate first-unnatural 2D/3D waveguides.
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Angew. Chem., Int. Ed. 2023, 00, 202302929
Underwater waveguide sensor
Amphibian-like, mechanically flexible hydrophobic organic crystalline optical fibres are potential candidates as air/underwater compatible optical signal transducers and high-precision underwater microparticle sensors. We demonstrate micro-particle sensing by exploiting the dual active/passive waveguiding in an organic crystal waveguide.
Angew. Chem., Int. Ed. 2023, 00, 202300046
Hybrid Directional Coupler
Hybrid directional couplers are important photonic circuit components as they enable multi-tasking capabilities with single optical components!!!
They act as signal and chromaticity modulators with the same circuit geometry depending on the port receiving the input light.
J. Mater. Chem. C 2023,
Publications
26. Spatially Controllable and Mechanically Switchable Isomorphous Organoferroeleastic Crystal Optical Waveguides and Networks.
A. Vinod Kumar, § S. Ranjan,§ R. Chandrasekar, S. Takamizawa.(§-Contributed equally)
Nat. Commun. (In principle, accepted)
25. Capturing the Interplay Between TADF and RTP through Mechanically Flexible Polymorphic Optical Waveguides.
A. Vinod Kumar,§ Pradip Pattanayak,§ Ankur Khapre, Arnab Nandi, Pradipta Purkayastha, Rajadurai Chandrasekar.
(§-Contributed equally)
Angew. Chem. Int. Ed. 2024. DOI10.1002/202411054.
24. Powering Monolithic and Hybrid Organic Optical Waveguides via Integrated Focused Micro-LEDs for Sustainable Photonic Circuits.
A. Vinod Kumar,§ Ankur Khapre,§ R. Chandrasekar.
https://arxiv.org/abs/2402.18889.
23. An Extremely Pseudo-Plastic, Organic Crystal-Based Concentric[1]Ring-Resonator Coupled Optical Waveguide.
A. Vinod Kumar, Deepak Manoharan, Ankur Khapre, Soumyajith Ghosh, R. Chandrasekar.
Adv. Phys. Res. 2024, 2400075
22. Mechanophotonics: Pseudo-Plastic Organic Crystal as a Fermat Spiral Optical Waveguide.
M. Chosenyah, A. Vinod Kumar, R. Chandrasekar.
https://arxiv.org/abs/2402.18878.
21. A Hybrid Organic-Crystal-based Curved Waveguide Network for Producing, Splitting, and Transducing Multi-Color Outputs.
A. Vinod Kumar, § M. Rohullah,§ R. Chandrasekar.(§-Contributed equally)
Laser Photonics Rev. 2024, 2400020.
20. A Pick-and-Place Technology Enabled, Mechanically Programmable, Spiral Optical Waveguides Integrated Hybrid Circuits from Four Extremely Pseudo-Plastic Organic Crystals.
A. Vinod Kumar, M. Godumala, J. Ravi, R. Chandrasekar.
Adv. Opt. Mater. 2024, 12, 2302807.
19. Highly-strained, Pseudo-plastic, Cu-pyridyl Coordination Polymer Crystal based Optical Waveguide-Cavity.
P. Shiva, A. Khapre, M. Chosenyah, A. Vinod Kumar,* R. Chandrasekar. (* Corresponding author)
Chem. Mater. 2023, 35, 2302369.
18. A Tandem Approach to Fabricate a Hybrid, Organic-Add-Drop Filter Using Single-Crystal Disk-Resonators and Pseudo-Plastic Crystal Waveguides.
A. Vinod Kumar, § V. V. Pradeep,§ R. Chandrasekar.
Laser Photonics Rev. 2023, 17, 2300552. (§-Contributed equally)
17. Dimension Engineering of Light-Stimuli-Responsive 1D Molecular Crystals into Unusual 2D and 3D Zigzag Waveguides.
A. Vinod Kumar,§ M. Annadhasan,§ P. Giri, S. Nandy, M. K. Panda, K. V. Jovan Jose, R. Chandrasekar.
Angew. Chem. Int. Ed. 2023, 62, e202302929. (§-Contributed equally)
16. Amphibian-like Flexible Organic Crystal Optical Fibers for Underwater/Air Micro-Precision Lighting and Sensing
A. Vinod Kumar,§ M. Rohullah,§ M. Chosenyah, J. Ravi, U. Venkataramudu and R. Chandrasekar*
Angew. Chem. Int. Ed. 2023, 62, e202300046. (§-Contributed equally).
15. Mechanophotonics for Multifunctional Hybrid Directional Coupler from Flexible Organic Crystals.
A. Vinod Kumar and R. Chandrasekar.
J. Mater. Chem. C 2023, 11, 7995-8001.
14. A Broadband, Multiplexed-Visible-Light-Transport in Composite Flexible-Organic-Crystal Waveguide.
A. Vinod Kumar, Mallesham Godumala, Jada Ravi, and Rajadurai Chandrasekar.
Angew. Chem. Int. Ed. 2022, 61, e202212382.
13. Race-Track type Resonator Integrated Active Add-Drop Filter from Flexible Organic Crystals: Experiments and Numerical Calculations.
A. Vinod Kumar, Evgeniy Mamonov, Tatiana Murzina, Rajadurai Chandrasekar.
Adv. Opt. Mater. 2023, 11, 202201507.
12. A Mechanophotonic Approach towards an Organic, Flexible Crystals Optical Interferometer.
A. Vinod Kumar, R. Chandrasekar.
Adv. Opt. Mater. 2023, 11, 202201009.
11. Micromechanically-Powered Rolling Locomotion of Twisted-Crystal Optical-Waveguide-Cavity as a Mobile Light Polarization Rotor.
M. Rohullah, V. Vinay Pradeep, J. Ravi, A. Vinod Kumar, R. Chandrasekar.
Angew. Chem. Int. Ed. 2022, 61, e202202114.
10. Realization of Mechanically Maneuverable Circuit Ports in Organic Hybrid Photonic Chip for 360° Steering of Bandwidth Engineered Signals.
J. Ravi, A. Vinod Kumar, M. Annadhasan, R. Chandrasekar.
Adv. Opt. Mater. 2022, 10, 2102545.
9. Integrating Triply- and Singly-Bent Highly Flexible Crystal Optical Waveguides for Organic Photonic Circuit with a Long-Pass-Filter Effect.
M. Annadhasan, V. Vinay Pradeep, A. Vinod Kumar, J. Ravi, R. Chandrasekar.
Small Structures 2021, 3, 2100163.
8. Room temperature phosphorescent organic materials for optical waveguides
A. Vinod Kumar§, M. Godumala§, R. Chandrasekar.
J. Mater. Chem. C 2021, 9, 14115-14132. (§-Contributed equally)
7. Geometrically-Reconfigurable, Two Dimensional, All-Organic Photonic Integrated Circuits Made from Two Mechanically and Optically Dissimilar Crystals.
J. Ravi, A. Vinod Kumar, D. Prasad Karothu, M. Annadhasan, P. Naumov, R. Chandrasekar.
Adv. Funct. Mater. 2021, 31, 2105415.
6. Mechanophotonic aspects of a room temperature phosphorescent flexible organic microcrystal.
A. Vinod Kumar, M. Rohullah, J. Ravi, M. Godumala, M. Annadhasan, R. Chandrasekar.
Crys. Engg. Comm. 2021, 23, 5774 - 5779.
5. Mechanically Reconfigurable Organic Photonic Integrated Circuits Made from Two Electronically Different Flexible Microcrystals.
J. Ravi, M. Annadhasan, A. Vinod Kumar, R. Chandrasekar.
Adv. Funct. Mater. 2021, 31, 2100642.
4. Spatio-Temporal Growth Anomalies in Photo-Isomerisable Cyanostilbene-Based Crystals Triggered by Light.
A. Vinod Kumar§, M. Annadhasan§, V. V. Pradeep, M. Jyothi, K. V. J. Jose, R. Chandrasekar.
J. Phys. Chem. C 2021, 125, 4909-4916. (§-Contributed equally)
3. Magnetic Field-Assisted Manipulation of Polymer Optical Microcavities.
M. Annadhasan, A. Vinod Kumar, E. A. Mamonov, T. Murzina, R. Chandrasekar.
Adv. Photonics Res. 2021, 2, 2000146.
2. Mechanical Processing of Naturally Bent Organic Crystalline Microoptical Waveguides and Junctions.
V. V. Pradeep, C. Tardío, I. T. -Moya, A. M. Rodrígue, A. Vinod Kumar, M. Annadhasan, A. de la Hoz, P. Prieto, R. Chandrasekar.
Small 2021, 17, 2006795.
1. Mechanophotonics: Precise-Selection, assembly and disassembly of polymer optical microcavities via mechanical manipulation for spectral engineering.
M. Annadhasan, A. Vinod Kumar, D. Venkatakrishnarao, E. A. Mamonov, R. Chandrasekar.
Nanoscale Advances 2020, 2, 5584-5590.