Professional Background

• Smalley Postdoctoral Fellow, Rice University, 2015–2018
• Visiting Researcher – CNRS Strasbourg France, 2018

Research Interests

• Laser-based metal additive manufacturing
• Optical beam shaping
• Two-photon lithography 3D printing
• Near-field microscopy and optical force-based interactions
• Light-matter interactions in plasmonics and metamaterials
• Laser damage in materials

MS and PhD, Materials Science and Engineering, Norfolk State University, Norfolk, VA, 2009–2015

BS, Purdue University, Materials Science and Engineering, West Lafayette, IN, 2009

1. T. U. Tumkur, T. Voisin, R. Shi, P. J. Depond, T. T. Roehling, S. Wu, M. F. Crumb, J. D. Roehling, G. Guss, S. A. Khairallah, M. J. Matthews, ‘Non-diffractive beam shaping for enhanced optothermal control in metal additive manufacturing’, Science Advances 7 (38), eabg9358, 2021 (Cover article)
2. T. U. Tumkur, R. Sokhoyan, M. P. Su, A. Ceballos-Sanchez, G. K. Shirmanesh, Y. Kim, H. A. Atwater, E. Feigenbaum, S. Elhadj, ‘Toward high laser power beam manipulation with nanophotonic materials: evaluating thin film damage performance’, Optics Express, 29 (5), 7261-7275, 2021
3. T. U. Tumkur*, M. A. Hurier*, M. D. Pichois, M. Vomir, B. Donnio, J. L. Gallani, and M. V. Rastei. ‘Photoinduced Atomic Force Spectroscopy and Imaging of Two-Dimensional Materials’ Phys. Rev. Appl. 11, 044066, 2019
4. C. Zhang*, T. U. Tumkur*, J. Yang, M. Lou, L. Dong, L. Zhou, P. Nordlander, N. J. Halas, ‘Optical-Force-Dominated Directional Reshaping of Au Nanodisks in Al–Au Heterodimers’, Nano letters 18 (10), 6509-6514, 2018. [*equal contribution]
5. T. U. Tumkur, X. Yang, C. Zhang, Y. Zhang, G. V. Naik, P. Nordlander, N. J. Halas, ‘Wavelength-dependent Near Field Imaging of Optical Forces in Bimetallic Plasmonic Al-Au Heterodimers’, Nano Letters 18 (3), 2040–2046, 2018
6. T. U. Tumkur*, X. Yang*, B. Cerjan, N. J. Halas, P. Nordlander, I. Thomann, ‘Photo-induced force mapping of plasmonic nanostructures’, Nano Letters 16 (12), 7942-7949, 2016
7. T. U. Tumkur, G. Zhu, M. A. Noginov, ‘Strong coupling of surface plasmon polaritons and ensembles of dye molecules’, Optics Express 24 (4), 3921-3928, 2016 (Surface Plasmon Photonics special issue)
8. T. U. Tumkur, J. K. Kitur, C. E. Bonner, E. E. Narimanov, M. A. Noginov, ‘Control of Förster energy transfer in vicinity of metallic surfaces and hyperbolic metamaterials, Faraday Discussions, FD 178, 2014

For a full list, see: Google Scholar 

 

• LLNL Director’s award for DEI, 2022
• First place winner—Postdoc Research Slam! at LLNL, 2019
• J. Evans/Attwell–Welch Postdoctoral fellowship, Rice University, 2018

Highlights:

LLNL explores laser beam shaping to improve metal 3D printing