Team presentation Alexander Korneev Our team Tikhonov Moscow - PowerPoint PPT Presentation

Team presentation Alexander Korneev

Our team Tikhonov Moscow Institute of Electronics and Mathematics Higher School of Economics (National Research University) Moscow State Pedagogical University Key persons: Dr. Gregory Goltsman Dr. Alexander Korneev Dr. Roman Ozhegov + master and PhD students Our spin-off companies: founded 2016 founded 2005

Our expertize • Thin disordered superconducting films with high sheet resistance and kinetic inductance Sheet resistance > 500 Ohm/square Glue Kinetic inductance > 100 pH/square 5 nm NbN SiO 2 Si • Nanodevices made from these films: • Hot electron bolometers • Superconducting single-photon detectors • Research into quantum effects in such films such as quantum phase slips, etc

Our fabric ication and characterization capabilit itie ies We have for fabrication: • Magnetron, e-beam, and thermal deposition • Photo- and e-beam lithography • RIE For characterization: • SEM • AFM • Electrical and optical characterization in liquid He (down to 1.7 K) • BlueFors cryocooler (~100 mK) • Microwave sources up to 1.2 THz • Optical and infrared lasers

Hot ele lectron bolo lometers (HEB) and Su Superconductin ing sin single le-photon detectors (S (SSP SPD) 80 nm 200 nm HEB: SSPD: • • Best sensitivity at frequencies Best performance at wavelengths above 1 THz above 1 µm (including 1550 nm) • • Can by used as direct detector and Detection efficiency above 90% • as a heterodyne detector (mixer) Dark (false) count rate below 1 s -1 • • Applications is radioastronomy Timing jitter below 50 ps • (ground-based and space-born) Applications: quantum optics and quantum cryptography Both technologies are commercially available!

Photonics cir ircuit its in integrated wit ith superconductin ing detectors on the same chip ip Today’s trend in quantum optics – integration of all optical elements on chip including sources and detectors SSPD on optical waveguide: Above 90% on-chip detection efficiency

Photonics cir ircuit its wit ith SSPD, , an appli lication example: spectrometer on chip ip O. Kahl, et al Optica 4 (5), 2017 the confocal scanning system a diamond nanocluster with embedded SiV color centers 5 μm On-chip spectrometer T =1.6K Input losses = 9.7dB Timing jitter System DE = 1.97%

Thermal and quantum phase slip lips study in in NbN nanowir ires Thin film fabrication and nanowire patterning: • Film sheet resistance up to 1kOhm/sq. • Minimal nanowire width: 30 nm. Peltonen J. T., et al PRB 2013 Peltonen J. T. et al PRB 2016 K Yu Arutyunov et al Nanotechnology 2016

Proposed role le in in the proje ject • High resistive NbN film fabrication • Nanopatterning • Device characterization (1) Nanowire in high impedance environment: • Kinetic inductance up to several µH High kinetic High kinetic (meander size 20 µm x 20 µm) inductance inductance • Nanowire size ~30 nm x 1-2 µm NbN meander NbN meander Nanowire (2) Superconducting memory based on kinetic inductance nanowires: • Presently realized by Bezryadin et al in MoGe Andrew Murphy, Dmitri V Averin and • We want to realize in NbN (higher Tc) Alexey Bezryadin, New J. of Physics 2017

Thank you!