Felix Ritzkowsky

Postdoctoral Fellow/Associate

Massachusetts Institute of Technology
Department of Electrical Engineering and Computer Science
66 Massachusetts Ave., Suite 36-227
Cambridge, MA 02139

fritzkow@mit.edu

Felix holds the Feodor-Lynen Research Fellowship, awarded by the Alexander von Humboldt Foundation, and is currently a postdoctoral researcher in the Electrical Engineering Department at MIT. He received his doctorate degree from the University of Hamburg in 2023 working at DESY in the group of Prof. Dr. Franz Kärtner on ultrafast MIR laser development and petahertz electronics. His B.Sc. and M. Sc. degrees Felix received from the University of Konstanz working on ultrafast fiberlaser systems and on attosecond charge transport in nanosystems.
His current work is focused on the development of few-cycle lasersources in the shortwave infrared and on petahertz electronics.

QNN Publications, Conference Papers, Talks & Thesis

[1]

F. Ritzkowsky, M. Yeung, G. L. Dolso, L.-T. Chou, and P. D. Keathley, "High-Repetition Rate, CEP-stable Shortwave Infrared Source with Two-Cycle Pulses for Field-Resolved Spectroscopy," Apr. 08, 2025, Optica Open. doi: 10.1364/opticaopen.28734833.v2.

[1]

M. Yeung et al., "Bandwidth of Lightwave-Driven Electronic Response from Metallic Nanoantennas," Nano Lett., vol. 25, no. 13, pp. 5250–5257, Apr. 2025, doi: 10.1021/acs.nanolett.4c06536.

[1]

P. D. Keathley and F. Ritzkowsky, "Comment on 'Synthesis and Direct Sampling of Single-Cycle Light Transients by Electron Tunneling in a Nanodevice,'" ACS Photonics, Jan. 2025, doi: 10.1021/acsphotonics.4c01800.

[1]

F. Ritzkowsky et al., "On-chip petahertz electronics for single-shot phase detection," Nat Commun, vol. 15, no. 1, pp. 1–8, Nov. 2024, doi: 10.1038/s41467-024-53788-z.

[1]

M. Yeung, L.-T. Chou, M. Turchetti, F. Ritzkowsky, K. K. Berggren, and P. D. Keathley, "Lightwave-electronic harmonic frequency mixing," Science Advances, vol. 10, no. 33, p. eadq0642, Aug. 2024, doi: 10.1126/sciadv.adq0642.

[1]

F. Ritzkowsky, “Quantitative Pulse Characterization of Octave Spanning Pulses in the MIR,” presented at the Conference on Lasers and Electro-Optics (CLEO 2024), May 09, 2024.

[1]

A. R. Bechhofer et al., “Compact Circuit Models for Nanoantenna-Based Petahertz Electronics,” presented at the 2024 Conference on Lasers and Electro-Optics (CLEO), Charlotte, NC: Optica, May 2024, p. JTh2A.222.

[1]

F. Ritzkowsky et al., "Large Area Optical Frequency Detectors for Single-Shot Phase Readout," Jun. 02, 2023, arXiv: arXiv:2306.01621. doi: 10.48550/arXiv.2306.01621.

[1]

F. Ritzkowsky et al., "Single-Shot Carrier-Envelope Phase Detection in PHz Electronic Networks," in CLEO 2023 (2023), paper SM1M.5, Optica Publishing Group, May 2023, p. SM1M.5. Accessed: Jul. 24, 2023. [Online]. Available:

[1]

F. Ritzkowsky, M. R. Bionta, M. Turchetti, K. K. Berggren, P. D. Keathley, and F. X. Kärtner, "Tailoring the Impulse Response of Petahertz Optical Field-Sampling Devices," in The International Conference on Ultrafast Phenomena (UP) 2022 (2022), paper Th1A.4, Optica Publishing Group, Jul. 2022, p. Th1A.4. Accessed: Sep. 21, 2022. [Online]. Available:

[1]

D. Cattozzo Mor et al., “PHz Electronic Device Design and Simulation for Waveguide-Integrated Carrier-Envelope Phase Detection,” Journal of Lightwave Technology, vol. 40, no. 12, pp. 3823–3831, Jun. 2022, doi: 10.1109/JLT.2022.3150246.

[1]

D. Cattozzo Mor et al., "PHz Electronic Device Design and Simulation for Waveguide-Integrated Carrier-Envelope Phase Detection," arXiv:2109.12558 [physics], Sep. 2021, Accessed: Oct. 13, 2021. [Online]. Available:

[1]

M. R. Bionta et al., "On-chip sampling of optical fields with attosecond resolution," Nat. Photonics, vol. 15, no. 6, pp. 456–460, Jun. 2021, doi: 10.1038/s41566-021-00792-0.

[1]

D. Cattozzo Mor et al., "PHz Electronic Device Design for Waveguide-Integrated Carrier-Envelope Phase Detection," in Conference on Lasers and Electro-Optics (2021), paper SW3J.3, Optical Society of America, May 2021, p. SW3J.3. doi: 10.1364/CLEO_SI.2021.SW3J.3.

[1]

M. Turchetti et al., "Impact of DC bias on weak optical-field-driven electron emission in nano-vacuum-gap detectors," J. Opt. Soc. Am. B, JOSAB, vol. 38, no. 3, pp. 1009–1016, Mar. 2021, doi: 10.1364/JOSAB.413680.