Selected Publications

  • M. R. Bionta, F. Ritzkowsky, M. Turchetti, Y. Yang, D. C. Mor, W. P. Putnam, F. X. Kärtner, K. K. Berggren, P. D. Keathley, “On-chip sampling of optical fields with attosecond resolution,” arXiv:2009.06045 (2020).
  • Y. Yang, M. Turchetti, P. Vasireddy, W. P. Putnam, O. Karnbach, A. Nardi, F. X. Kärtner, K. K. Berggren, and P. D. Keathley, “Light phase detection with on-chip petahertz electronic networks,” Nature Communications 11, 3407 (2020).
  • P. D. Keathley, W. P. Putnam, P. Vasireddy, R. G. Hobbs, Y. Yang, K. K. Berggren, and F. X. Kärtner, “Vanishing carrier-envelop-phase-sensitive response in optical-field photoemission from plasmonic nanoantennas,” Nature Physics 15, 1128 (2019).
  • W. P. Putnam, P. D. Keathley, J. A. Cox, A. Liehl, A. Leitenstorfer, and F. X. Kärtner, “Few-cycle, carrier-envelope-phase-stable laser pulses from a compact supercontinuum source,” JOSA B 36, 93 (2019).
  • R. G. Hobbs, W. P. Putnam, A. Fallahi, Y. Yang, F. X. Kärtner, and K. K. Berggren, “Mapping photoemission and hot-electron emission from plasmonic nanoantennas, Nano Letters 17, 6069 (2017).
  • W. P. Putnam, R. G. Hobbs, P. D. Keathley, K. K. Berggren, and F. X. Kärtner, “Optical-field-controlled photoemission from plasmonic nanoparticles,” Nature Physics 13, 335 (2017).
  • N. Schimpf, W. P. Putnam, M. D. W. Grogan, S. Ramachandran, and F. X. Kärtner, “Radially polarized Bessel-Gauss beams: decentered Gaussian beam analysis and experimental verification,” Optics Express 21, 18469 (2013).
  • P. D. Keathley, A. Sell, W. P. Putnam, S. Guerrera, L. Velasquez-Garcia, and F. X. Kärtner, “Strong-field photoemission from silicon field emitter arrays,” Annalen der Physik 525, 144 (2013).
  • D. N. Schimpf, J. Schulte, W. P. Putnam, and F. X. Kärtner, “Generalizing higher-order Bessel-Gauss beams: analytical description and demonstration,” Optics Express 20, 26852 (2012).
  • W. P. Putnam, D. N. Schimpf, G. Abram, and F. X. Kärtner, “Bessel-Gauss beam enhancement cavities for high-intensity applications,” Optics Express 20, 24429 (2012).
  • J. A. Cox, W. P. Putnam, A. Sell, A. Leitenstorfer, and F. X. Kärtner, “Pulse synthesis in the single-cycle regime from independent mode-locked lasers using attosecond-precision feedback,” Optics Letters 37, 3579 (2012).
  • W. P. Putnam and M. F. Yanik, “Noninvasive electron microscopy with interaction-free quantum measurements,” Physical Review A 80, 040902(R) (2009).

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