Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.


Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Nikolai Klimov

Dr. Nikolai N. Klimov is an experimental condensed matter physicist and a Project Leader (Nanoscale Fabrication and Photonics), in the Thermodynamic Metrology Group within the Physical Measurement Laboratory (PML). He received his B.S. and M.S. in Physics and Applied Mathematics from Moscow Institute of Physics and Technology (MIPT) and Ph.D. in Experimental Condensed Matter Physics from Rutgers University. His expertise is in physics and nanofabrication of semiconductor devices and structures, photonics-based nanoscale sensors and standards, and low-dimensional systems including devices based on 2D atomic crystal materials. After obtaining his Ph.D. Nikolai worked at NIST (Center for Nanoscale Science and Technology / Physical Measurement Laboratory) as a Postdoctoral Researcher on the development of gated graphene-based nanodevices, and exploring graphene’s electrical properties in a real device structures using both magneto-transport and ultra-high vacuum scanning tunneling microscopy and spectroscopy measurement techniques. Dr. Klimov’s current research is focused on the development of new field-deployable, nanophotonics-based quantum SI sensors and primary standards for temperature, pressure, vacuum, humidity, and radiation dosimetry. Within this research activity, Dr. Klimov has recently pioneered the development of on-chip integrated ultra-high resolution photonic thermometers that surpass the performance of standard platinum resistance thermometers (SPRTs), the best in class resistance temperature sensors used to disseminate the International Temperature Scale of 1990. These pioneering results show the potential of photonic thermometers to serve as a future temperature standard and replace the 150 year-old resistance thermometry. Dr. Klimov currently leads the commercialization of photonic thermometry, a collaborative effort with an industry partner. In addition, to projects related to integrated nanophotonics quantum SI metrology, Dr. Klimov is also developing grating-based devices for next-generation neutron interferometric imaging; strongly-interacting hybrid quantum systems on a chip, in which ensembles of cold atoms and cold molecules are coupled to nanophotonic devices and structures; and topologically-ordered systems for quantum information processing based on lithium niobate platform. Dr. Klimov is a recipient of NIST-ARRA Postdoctoral Fellowship (NIST/UMD) and Distinguished Associate Award (PML, NIST).

Selected Programs/Projects

  • Hybrid (nanophotonics/cold atom/cold molecules) quantum systems
  • Nano and micro grating-based devices for neutron interferometric phase imaging
  • Integrated, nanophotonics-based, quantum SI metrology (photonic thermometry, photonic humidity, vacuum & pressure, photonic dosimetry, photonic AC-DC thermal transfer standard)
  • Chip-scale, topologically-ordered systems for quantum information processing

Selected Publications

  • Single-beam slower and magneto-optical trap using a nano-fabricated grating, D.S. Barker, E. Norrgard, N.N. Klimov, J. Fedchak, J. Scherschligt, S. Eckel, Phys. Rev. A 11, 064023 (2019). 
  • Nuclear-spin dependent parity violation in optical trapped polyatomic molecules, E.B. Norrgard, D.S. Barker, S.P. Eckel, J.A. Fedchak, N.N. Klimov, J. Scherschligt, Nature Comm. Phys. 2, 77 (2019).
  • Review article: Quantum-based vacuum metrology at the National Institute of Standards and Technology, J. Scherschligt, J.A. Fedchak, Z. Ahmed, D.S. Barker, K. Douglass, S. Eckel, E. Hanson, J. Hendricks, N.N. Klimov, T. Purdy, J. Ricker, R. Singh, J. Stone, JVST A 36, 040801 (2018).
  • Challenges to miniaturizing cold atom technology for deployable vacuum metrology, S. Eckel, D. Barker, J.A. Fedchak, N.N. Klimov, E.B. Norrgard, J. Scherschligt; C. Makrides, E. Tiesinga, Metrologia 55(5), S182 (2018). 
  • Towards replacing resistance thermometry with photonic thermometry, N.N. Klimov, T.P. Purdy, Z. Ahmed, Sensors & Actuators A 269, 308-312 (2018).
  • Assessing Radiation Hardness of Silicon Photonic Sensors, Z. Ahmed, L. Cumberland, R. Tosh, N.N. Klimov, I.M. Pazos, R.P. Fitzgerald, Scientific Reports 8, 13007 (2018). 
  • Photonic thermometry: upending 100 year-old paradigm in temperature metrology, Z. Ahmed, N.N. Klimov, T. Purdy, T. Herman, K.O. Douglass, R.P. Fitzgerald, SPEI Proceedings.
  • Development of a new UHV/XHV pressure standard (Cold Atom Vacuum Standard), J.K. Scherschligt, J.A. Fedchak, D.S. Barker, S.P. Eckel, N.N. Klimov, C. Makrides, E. Tiesinga, Metrologia 54, S125-S132 (2017) (a Special Issue Article).
  • Coulomb drag and counterflow Seebeck coefficient in bilayer-graphene double layers J. Hu, D.B. Newell, J. Tian, N.N. Klimov, D.B. Newell, Y.P. Chen, Nano Energy 40, 42-48 (2017).
  • Towards photonics enabled quantum metrology of temperature, pressure and vacuum, Z. Ahmed, N.N. Klimov, J. Hendricks, Encyclopedia of Nanoscience and Nanotechnology, book chapter (2016).
  • Edge-state transport in graphene p-n junctions in the quantum Hall regime, N.N. Klimov, S.T. Le, J. Yan, P. Agnihotri, E. Comfort, J.U. Lee, D.B. Newell, C.A. Richter, Phys. Rev. B: Rapid Communications 92, 241301 (2015). 
  • On-Chip silicon waveguide Bragg grating photonic temperature sensor, N.N. Klimov, S. Mittal, M. Berger, Z. Ahmed, Optics Letters 40(17), 3934-3936 (2015).
  • Nanoscale interfacial friction and adhesion on supported versus suspended monolayer and multilayer graphene, Z. Deng, N.N. Klimov, S.D. Solares, T. Li, H. Xu, R.J. Cannara, Langmuir 29 (1), 235 (2013).
  • Electro-mechanical properties of graphene drumheads, N.N. Klimov, S. Jung, S. Zhu, T. Li, C.A. Wright, S.D. Solares, D.B. Newell, N.B. Zhitenev, J.A. Stroscio, Science 336, 1557-1561 (2012). 
  • Microscopic polarization in bilayer graphene, G.M. Rutter, S.Y. Jung, N.N. Klimov, D.B. Newell, N.B. Zhitenev, J.A. Stroscio, Nature Physics 7, 649-655 (2011).
  • Evolution of microscopic localization in graphene in a magnetic field: from scattering resonances to quantum dots, S.Y. Jung, G.M. Rutter, N.N. Klimov, D.B. Newell, I. Calizo, A.R. Hight-Walker, N.B. Zhitenev, J.A. Stroscio, Nature Physics 7, 245-251 (2011).
  • Mechanism for puddle formation in graphene, S. Adam, S.Y. Jung, N.N. Klimov, N.B. Zhitenev, J.A. Stroscio, M.D. Stiles, Phys. Rev. B 84, 235421 (2011). 
  • Interaction effects in the conductivity of a two-valley electron system in high-mobility Si inversion layers, N.N. Klimov, D.A. Knyazev, O.E. Omel’yanovskii, V.M. Pudalov, H. Kojima, M.E. Gershenson, Phys. Rev. B 78, 195308 (2008), (Editor’s Suggestion). 
  • Intervalley scattering and weak localization in Si-based two-dimensional structures A.Yu. Kuntsevich, N.N. Klimov, S.A. Tarasenko, N.S. Averkiev, V.M. Pudalov, H. Kojima, M.E. Gershenson, Phys. Rev. B 75, 195330 (2007). 

Patent Applications

  • Photonic dosimeter and process for performing dosimetry, R. Tosh, Z. Ahmed, N.N. Klimov, R. Fitzgerald, U.S. patent application, Pub. No: 2019/0293808.
  • Photonic calorimeter and process for performing calorimetry, R. Tosh, Z. Ahmed, N.N. Klimov, R. Fitzgerald, U.S. patent application, Pub. No: 2019/0293809.
  • Photonic quantum dewpoint sensor, T. Herman, N.N. Klimov, T. Purdy, U.S. provisional patent application (NIST docket # 18-057US1).
  • High-resolution photonic thermometer, N.N. Klimov, K.O. Douglass, Z. Ahmed, U.S. patent application (NIST docket # 17-034us1).
  • Uniaxial counter-propagating monolaser atom trap, S. Eckel, D. Barker, N.N. Klimov, E. Norrgard, J. Fedchak J. Scherschligt, U.S. patent application (NIST docket # 18-050us1).
  • Dynamic neutron, and x-ray transmission grating, K.M. Weigandt, D.S. Hussey, N.N. Klimov. (DN-45 invention disclosure, submitted)
  • Room-temperature, waveguide-integrated photon counting detector with ultra-high dynamic range and near 100% detection efficiency, S.V. Polyakov, N.N. Klimov, I.A. Burenkov. (DN-45 invention disclosure, submitted)
  • Photonic AC/DC voltage converter, N.N. Klimov, J. Hagmann. (DN-45 invention disclosure, submitted)
  • Broadband, high absorption bolometer pixel structure read out using a photonic temperature sensor, N.N. Klimov, N. Tomlin, C. Yung (DN-45 invention disclosure submitted)


On-chip Silicon Photonics Radiation Sensors

Nikolai N. Klimov, Zeeshan Ahmed, Lonnie T. Cumberland, Ileana M. Pazos, Ronald E. Tosh, Ryan P. Fitzgerald
We have examined the impact of cobalt-60-ray radiation up to 1 megagray (MGy) absorbed dose on silicon photonic devices. We do not find any systematic impact
Created October 9, 2019, Updated January 24, 2020