USC.edu

Susumu Takahashi

Associate Professor of Chemistry and Physics and Astronomy
Susumu Takahashi
Email susumu.takahashi@usc.edu Office LJS 152 Office Phone (213) 821-3187

Research & Practice Areas

Experimental condensed matter physics, Physical Chemistry, Quantum Sensing, Spin Dynamics, Magnetic Resonance, Quantum Decoherence, Nanomagnetism

Center, Institute & Lab Affiliations

  • Center for Quantum Information Science & Technology (CQIST),

Biography

Research interests of Prof. Takahashi are quantum sensing, quantum materials and quantum dynamics. His recent investigations includes demonstration of nanoscale electron spin resonance/nuclear magnetic resonance eperiment using diamond quantum sensors, development of spin-based materials and devices for quantum information sciences and understanding of quantum dynamics of spins in solid state systems.

  • Summary Statement of Research Interests

    Our research focuses on the quantum physics of spin systems. Nitrogen-vacancy (NV) impurity centers in diamond are well-isolated from their surrounding environment. NV centers exhibit long quantum coherence which allows us to observe quantum mechanics in the system. We utilize various magnetic resonance techniques to implement quantum gate operations in the NV centers to realize quantum-assisted applications such as an extremely sensitive magnetic sensor which enables imaging of a single electron and nuclear spin. We also apply electron spin magnetic resonance to image static and dynamic structure of biological molecules.

  • Journal Article

    • Fortman, B., Pena, J., Holczer, K., Takahashi, S. (2020). Demonstration of NV-detected ESR spectroscopy at 115 GHz and 4.2 Tesla. Appl. Phys. Lett.. Vol. 116, pp. 174004. doi
    • Fortman, B., Takahashi, S. (2019). Understanding linewidth of ESR spectrum detected by a single NV center in diamond. J. Phys. Chem. A. Vol. 123, pp. 6350. doi
    • Stepanov, V., Takahashi, S. (2016). Determination of nitrogen spin concentration in diamond using double electron-electron resonance. Phys. Rev. B. Vol. 94, pp. 024421. doi
    • Romanova, E. E., Akiel, R., Takahashi, S. (2013). Grafting nitroxide radicals on nanodiamond surface using click chemistry. J. Phys. Chem. A. Vol. 117, pp. 11933.
    • Wang, Z., Takahashi, S. (2013). Spin decoherence and electron spin bath noise of a nitrogen-vacancy center in diamond. Phys. Rev. B. Vol. 87, pp. 115122.
    • Takahashi, S., Brunel, L., Edwards, D. T., van Tol, J., Ramian, G., Han, S., Sherwin, M. S. (2012). Free-electron laser-powered pulsed electron paramagnetic resonance spectroscopy. Nature. Vol. 489, pp. 409-413.
    • Takahashi, S., Tupitsyn, I. S., van Tol, J., Beedle, C. C., Hendrickson, D. N., Stamp, P. C. (2011). Decoherence in crystals of quantum molecular magnets. Nature. Vol. 476, pp. 76.