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 Our spin-off companies:

founded 2005 founded 2016

Key persons:

• Dr. Gregory Goltsman
• Dr. Alexander Korneev
• Dr. Roman Ozhegov

+ master and PhD students

Our expertize

• Thin disordered superconducting films with high

sheet resistance and kinetic inductance

• 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

Si NbN Glue SiO2 5 nm Sheet resistance > 500 Ohm/square Kinetic inductance > 100 pH/square

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)

200 nm 80 nm

HEB:

• Best sensitivity at frequencies

above 1 THz

• Can by used as direct detector and

as a heterodyne detector (mixer)

• Applications is radioastronomy

(ground-based and space-born) SSPD:

• Best performance at wavelengths

above 1 µm (including 1550 nm)

• Detection efficiency above 90%
• Dark (false) count rate below 1 s-1
• Timing jitter below 50 ps
• 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

• n 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

5 μm

the confocal scanning system a diamond nanocluster with embedded SiV color centers

• O. Kahl, et al Optica 4 (5), 2017

T=1.6K Input losses = 9.7dB System DE = 1.97% On-chip spectrometer

Timing jitter

Thermal and quantum phase slip lips study in in NbN nanowir ires

Peltonen J. T., et al PRB 2013 Peltonen J. T. et al PRB 2016 K Yu Arutyunov et al Nanotechnology 2016 Thin film fabrication and nanowire patterning:

• Film sheet resistance up to 1kOhm/sq.
• Minimal nanowire width: 30 nm.

Proposed role le in in the proje ject

High kinetic inductance NbN meander High kinetic inductance NbN meander

Nanowire

• High resistive NbN film fabrication
• Nanopatterning
• Device characterization

(1) Nanowire in high impedance environment: (2) Superconducting memory based on kinetic inductance nanowires:

Andrew Murphy, Dmitri V Averin and Alexey Bezryadin, New J. of Physics 2017

• Presently realized by Bezryadin et al in MoGe
• We want to realize in NbN (higher Tc)
• Kinetic inductance up to several µH

(meander size 20 µm x 20 µm)

• Nanowire size ~30 nm x 1-2 µm

Thank you!