Hemmer has paper published in prestigious publication

Hemmer, PhilipDr. Philip Hemmer, a professor in the Department of Electrical and Computer Engineering at Texas A&M University, had a paper published in the prestigious research publication Nature Nanotechnology.

The paper, "Molecular-sized Fluorescent Nanodiamonds," can be found online.

In the paper Hemmer said doping of carbon nanoparticles with impurity atoms is central to their application. However, doping has proven elusive for very small carbon nanoparticles because of their limited availability and a lack of fundamental understanding of impurity stability in such nanostructures. They show that isolated diamond nanoparticles as small as 1.6 nm, comprising only ~400 carbon atoms, are capable of housing stable photoluminescent colour centres, namely the silicon vacancy (SiV). Surprisingly, fluorescence from SiVs is stable over time, and few or only single colour centres are found per nanocrystal. They also observe size-dependent SiV emission supported by quantum-chemical simulation of SiV energy levels in small nanodiamonds. Their work opens the way to investigating the physics and chemistry of molecular-sized cubic carbon clusters and promises the application of ultrasmall non-perturbative fluorescent nanoparticles as markers in microscopy and sensing.

The full listing of authors is as follows: Igor I. Vlasov, Andrey A. Shiryaev, Torsten Rendler, Steffen Steinert, Sang-Yun Lee, Denis Antonov, Márton Vörös, Fedor Jelezko, Anatolii V. Fisenko, Lubov F. Semjonova, Johannes Biskupek, Ute Kaiser, Oleg I. Lebedev, Ilmo Sildos, , Vitaly I. Konov, Adam Gali and Jörg Wrachtrup.

Hemmer joined the engineering faculty at Texas A&M in January 2002. He received his bachelor’s degree from the University of Dayton in 1976 and his Ph.D. in physics from the Massachusetts Institute of Technology in 1984. His interest areas are in solid materials for quantum optics, especially “dark resonance” excitation, materials and techniques for resonant nonlinear optics, phase-conjugate-based turbulence aberration and compensation, spectral hole burning materials and techniques for ultra-dense memories and high temperature operation, quantum computing in solid materials, quantum communication and teleportation in trapped atoms, holographic optical memory materials, smart pixels devices, optical correlators, photorefractive applications, atomic clocks and laser trapping and cooling.

Honors include being elected Fellow of the Optical Society of America, receiving the Ruth and William Neely ‘52/Dow Chemical Fellowship, an outstanding faculty award from the electrical and computer engineering department, an NSF fellowship, the Air Force Research Laboratory Chief Scientist’s award and the Air Force Office of Scientific Research Star Team Award three times. He also is a member of the Optical Society of America, S.P.I.E. and American Physical Society.