Quantum Nanostructures and
Nanofabrication Group

Prof. Karl K. Berggren and Dr. P. Donald Keathley

QNN Quarterly Newsletter

We’ve had a busy summer in the lab and in terms of sharing our results. Here are a number of published papers and key activities.

Comings and Goings

This summer we welcomed the following new group members:

  • Kate Artyunova, UROP
  • Matteo Castellani, EECS Grad Student
  • Andrew Sorenson, MEng Grad Student

The following members have now left and become alumni group members:

  • Akshay Agarwal, completed his PhD!
    • Thesis title “Techniques for Enhancing Electron Microscopy”
  • Tao Cai, Summer UROP returning to University of Michigan
  • Dario Cattozzo Mor, Junior Researcher at Czech Academy of Sciences
  • Andres Lombo, returning to Senior year at University of Toronto
  • Glenn Martinez, Successfully defended his MS Thesis!
  • Di Zhu, taking technical staff position at IMRE in Singapore



[1] X. Zhang et al., “Physical properties of amorphous molybdenum silicide films for single-photon detectors,” Supercond. Sci. Technol., vol. 34, no. 9, p. 095003, Aug. 2021, doi:10.1088/1361-6668/ac1524.

[2] Q. Xie et al., “NbN-Gated GaN Transistor Technology for Applications in Quantum Computing Systems,” in 2021 Symposium on VLSI Technology, Jun. 2021, pp. 1–2.

[3] J. W. Simonaitis, B. Slayton, Y. Yang-Keathley, P. D. Keathley, and K. K. Berggren, “Precise, subnanosecond, and high-voltage switching enabled by gallium nitride electronics integrated into complex loads,” Review of Scientific Instruments, vol. 92, no. 7, p. 074704, Jul. 2021, doi:10.1063/5.0046706.

[4] D. Buckley, Y. Yang, Y. Yang-Keathley, K. K. Berggren, and P. D. Keathley, “Nanoantenna design for enhanced carrier–envelope-phase sensitivity,” J. Opt. Soc. Am. B, JOSAB, vol. 38, no. 9, pp. C11–C21, Sep. 2021, doi:10.1364/JOSAB.424549.

[5] 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.

[6] M. R. Bionta et al., “Tracking ultrafast solid-state dynamics using high harmonic spectroscopy,” Phys. Rev. Research, vol. 3, no. 2, p. 023250, Jun. 2021, doi:10.1103/PhysRevResearch.3.023250.

[7] R. Bhattacharya, M. Turchetti, P. D. Keathley, K. K. Berggren, and J. Browning, “Long term field emission current stability characterization of planar field emitter devices,” Journal of Vacuum Science & Technology B, vol. 39, no. 5, p. 053201, Sep. 2021, doi:10.1116/6.0001182.

[8] N. Abedzadeh et al., “Electrostatic electron mirror in SEM for simultaneous imaging of top and bottom surfaces of a sample,” Ultramicroscopy, vol. 226, p. 113304, Jul. 2021, doi:10.1016/j.ultramic.2021.113304.



M. Colangelo et al., “Impedance-matched differential SNSPDs for practical photon counting with sub-10 ps timing jitter,” in Conference on Lasers and Electro-Optics (2021), May 2021, p. FW2P.1. doi:10.1364/CLEO_QELS.2021.FW2P.1.

M. 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, May 2021, p. SW3J.3. doi:10.1364/CLEO_SI.2021.SW3J.3.

Lund Attosecond Symposium 2021

M. R. Bionta, “Tracking solid-state phase transitions with time-resolved HHG spectroscopy,” presented at the Lund Attoscience Symposium 2021, Virtual, Jun. 16, 2021.


M. Turchetti, “Emission Behavior of Planar Nano-Vacuum Field Emitters,” presented at the 34th International Vacuum Nanoelectronics Conference, Virtual, Jul. 07, 2021. [Online].


T. X. Zhou, “Ultra-wide MoSi SNSPD detectors,” presented at the 19th International Workshop on Low Temperature Detectors (LTD19), Virtual, Jul. 29, 2021. [Online].


P. D. Keathley, “On-Chip Petahertz Processing of Optical Fields,” presented at the ICN+T, Virtual, Jul. 2021.


Submission: US 63/076,463 Marco Turchetti, Mina R. Bionta, Felix Ritzkowsky, , Yujia Yang, Dario Cattozzo Mor, William P. Putnam, Franz X. Kärtner, Karl K. Berggren, Phillip D. Keathley “Integrated Optical Field Sampling Platform”