Dr. Boris S. Karasik Profile

Dr. Boris S. Karasik

Senior Research Scientist at Jet Propulsion Lab

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Author

Publications (16)

Proceedings Article | 9 March 2024 Presentation

Optical injection locking of a terahertz quantum-cascade VECESL with a diode frequency multiplier source

Christopher Curwen, Anthony Kim, Boris Karasik, Jonathan Kawamura, Benjamin Williams

Proceedings Volume PC12895, PC128950G (2024) https://doi.org/10.1117/12.3001146

KEYWORDS: Terahertz radiation, Quantum cascade lasers, Diodes, Quantum frequencies, Quantum sources, Spectroscopy, Signal to noise ratio, Phase shift keying, Amplitude modulation, Vertical external cavity surface emitting lasers

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Proceedings Article | 31 August 2022 Poster + Paper

Impedance models for tunable antenna-coupled intersubband terahertz (TACIT) mixers

C. Yoo, K. West, L. Pfeiffer, J. Kawamura, B. Karasik, M. Sherwin

Proceedings Volume 12190, 121901Z (2022) https://doi.org/10.1117/12.2630575

KEYWORDS: Terahertz radiation, Resistance, Prototyping, Instrument modeling, Heterodyning, Quantum wells, Sensors

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Proceedings Article | 26 August 2022 Presentation

Terahertz quantum-cascade VECSELs local oscillators for heterodyne receivers

Christopher Curwen, Jonathan Kawamura, Darren Hayton, Yu Wu, Sadhvikas Addamane, John Reno, Benjamin Williams, Boris Karasik

Proceedings Volume PC12190, PC121900A (2022) https://doi.org/10.1117/12.2629058

KEYWORDS: Heterodyning, Receivers, Oscillators, Terahertz radiation, Spectroscopes, Sensors, Quantum cascade lasers, Observatories, Mode locking, Microwave radiation

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Proceedings Article | 1 April 2022 Presentation

Towards quantum-cascade VECSELs for terahertz heterodyne local oscillators

Christopher Curwen, Anthony Kim, Yu Wu, Yue Shen, Darren Hayton, Jonathan Kawamura, Boris Karasik, Sadhvikas Addamane, John Reno, Benjamin Williams

Proceedings Volume PC11984, PC1198402 (2022) https://doi.org/10.1117/12.2615672

KEYWORDS: Terahertz radiation, Heterodyning, Oscillators, Laser stabilization, Antennas, Mode locking, Microwave radiation, Doppler effect, Diodes, Continuous wave operation

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Proceedings Article | 23 July 2014 Paper

Development of hot-electron THz bolometric mixers using MgB2 thin films

Daniel Cunnane, Jonathan Kawamura, Boris Karasik, Matthaeus Wolak, X. Xi

Proceedings Volume 9153, 91531Q (2014) https://doi.org/10.1117/12.2054607

KEYWORDS: Terahertz radiation, Silicon carbide, Superconductors, Antennas, Technetium, Gold, Thin films, Bridges, Silica, Resistance

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Terahertz high-resolution spectroscopy of interstellar molecular clouds greatly relies on hot-electron superconducting bolometric (HEB) mixers. Current state-of-the-art receivers use mixer devices made from ultrathin (~ 3-5 nm) films of NbN with critical temperature ~ 9-11 K. Such mixers have been deployed on a number of groundbased, suborbital, and orbital platforms including the HIFI instrument on the Hershel Space Observatory. Despite its good sensitivity and well-established fabrication process, the NbN HEB mixer suffers from the narrow intermediate frequency (IF) bandwidth ~ 2-3 GHz and is limited to operation at liquid Helium temperature. As the heterodyne receivers are now trending towards “high THz” frequencies, the need in a larger IF bandwidth becomes more pressing since the same velocity resolution for a Doppler shifted line at 5 THz requires a 5-times greater IF bandwidth than at 1 THz. Our work is focusing on the realization of practical HEB mixers using ultrathin (10-20 nm) MgB₂ films. They are prepared using a Hybrid Physical-Chemical Vapor Deposition (HPCVD) process yielding ultrathin films with critical temperature ~ 37-39 K. The expectation is that the combination of small thickness, high acoustic phonon transparency at the interface with the substrate, and very short electron-phonon relaxation time may lead to IF bandwidth ~ 10 GHz or even higher. SiC continues to be the most favorable substrate for MgB₂ growth and as a result, a study has been conducted on the transparency of SiC at THz frequencies. FTIR measurements show that semi-insulating SiC substrates are at least as transparent as Si up to 2.5 THz. Currently films are passivated using a thin (10 nm) SiO2 layer which is deposited ex-situ via RF magnetron sputtering. Micron-sized spiral antenna-coupled HEB mixers have been fabricated using MgB2 films as thin as 10 nm. Fabrication was done using contact UV lithography and Ar Ion milling, with E-beam evaporated Au films deposited for the antenna. Measurements have been carried out on these devices in the DC, Microwave, and THz regimes. The devices are capable of mixing signals above 20 K indicating that operation may be possible using a cryogen-free cooling system. We will report the results of all measurements taken to indicate the local oscillator power requirements and the IF bandwidth of MgB₂ HEB mixers.

Proceedings Article | 23 July 2014 Paper

Monolayer graphene bolometer as a sensitive far-IR detector

Boris Karasik, Christopher McKitterick, Daniel Prober

Proceedings Volume 9153, 915309 (2014) https://doi.org/10.1117/12.2055317

KEYWORDS: Sensors, Graphene, Bolometers, Tellurium, Amplifiers, Optical amplifiers, Microwave radiation, Antennas, Phonons, Microwave photonics

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Proceedings Article | 15 July 2010 Paper

Development of the nano-HEB array for low-background far-IR applications

Boris Karasik, Sergey Pereverzev, David Olaya, Michael Gershenson, Robin Cantor, Jonathan Kawamura, Peter Day, Bruce Bumble, Henry LeDuc, Steve Monacos, Dennis Harding, Daniel Santavicca, Faustin Carter, Daniel Prober

Proceedings Volume 7741, 774119 (2010) https://doi.org/10.1117/12.856682

KEYWORDS: Photons, Sensors, Antennas, Interference (communication), Microwave radiation, Multiplexing, Fused deposition modeling, Quantum cascade lasers, Phonons, Mid-IR

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Proceedings Article | 21 July 2008 Paper

Electrical NEP in hot-electron titanium superconducting bolometers

Boris Karasik, Sergey Pereverzev, David Olaya, Jian Wei, Michael Gershenson, Andrei Sergeev

Proceedings Volume 7020, 70200E (2008) https://doi.org/10.1117/12.788584

KEYWORDS: Titanium, Bolometers, Sensors, Superconductors, Phonons, Resistance, Measurement devices, Astronomy, Microwave radiation, Space telescopes

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Proceedings Article | 27 June 2006 Paper

An untrasensitive hot-electron bolometer for low-background SMM applications

David Olaya, Jian Wei, Sergei Pereverzev, Boris Karasik, Jonathan Kawamura, William McGrath, Andrei Sergeyev, Michael Gershenson

Proceedings Volume 6275, 627506 (2006) https://doi.org/10.1117/12.672303

KEYWORDS: Sensors, Superconductors, Terahertz radiation, Photons, Nanosensors, Niobium, Space telescopes, Bolometers, Photon counting, Telescopes

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Proceedings Article | 19 May 2005 Paper

Large CMOS imager using Hadamard transform based multiplexing

Boris Karasik, Mark Wadsworth

Proceedings Volume 5798, (2005) https://doi.org/10.1117/12.602840

KEYWORDS: Imaging systems, Multiplexing, Signal to noise ratio, Charge-coupled devices, Sensors, Signal processing, Amplifiers, Indium, Interference (communication), Quantum efficiency

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Proceedings Article | 29 April 1999 Paper

Hot-electron superconductive mixers for THz frequencies

William McGrath, Boris Karasik, Anders Skalare, Rolf Wyss, Bruce Bumble, Henry LeDuc

Proceedings Volume 3617, (1999) https://doi.org/10.1117/12.347111

KEYWORDS: Terahertz radiation, Receivers, Niobium, Antennas, Electrons, Resistance, Bolometers, Aluminum, Diffusion, Heterodyning

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Proceedings Article | 13 November 1998 Paper

Low-noise and wideband hot-electron superconductive mixer for terahertz frequencies

Boris Karasik, Anders Skalare, William McGrath, Bruce Bumble, Henry LeDuc, Jeff Barner, Alan Kleinsasser, P. Burke, Robert Schoelkopf, Daniel Prober

Proceedings Volume 3465, (1998) https://doi.org/10.1117/12.331162

KEYWORDS: Terahertz radiation, Niobium, Receivers, Antennas, Electrons, Phonons, Aluminum, Heterodyning, Superconductors, Diffusion

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Proceedings Article | 31 July 1998 Paper

Superconductive hot-electron mixers for terahertz heterodyne receiver applications

William McGrath, Anders Skalare, Boris Karasik, Michael Gaidis, Bruce Bumble, Henry LeDuc, P. Burke, R. Schoelkopf, D. Prober

Proceedings Volume 3357, (1998) https://doi.org/10.1117/12.317341

KEYWORDS: Terahertz radiation, Receivers, Antennas, Niobium, Heterodyning, Bolometers, Temperature metrology, Resistance, Aerospace engineering, Diffusion

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Proceedings Article | 2 July 1994 Paper

Evidence of subnanosecond transition stage in S-N current switching of YBaCuO films

Boris Karasik, Michael Zorin, Irina Milostnaya, Andrei Elantev, Gregory Gol'tsman, Eugeni Gershenzon

Proceedings Volume 2160, (1994) https://doi.org/10.1117/12.180991

KEYWORDS: Resistance, Switching, Picosecond phenomena, Phonons, Superconductors, Switches, Tellurium, Liquids, Laser ablation, Gold

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Proceedings Article | 20 May 1994 Paper

Nonbolometric and fast bolometric responses of YBaCuO thin films in superconducting, resistive, and normal states

Gregory Gol'tsman, Pavel Kouminov, Ivane Goghidze, Boris Karasik, Eugeni Gershenzon

Proceedings Volume 2159, (1994) https://doi.org/10.1117/12.176133

KEYWORDS: Superconductors, Resistance, Inductance, Picosecond phenomena, Thin films, Quasiparticles, Phonons, Physics, Electromagnetic radiation, Feature extraction

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Proceedings Article | 20 May 1994 Paper

Picosecond detection and broadband mixing of near-infrared radiation by YBaCuO films

Boris Karasik, Mikael Lindgren, Michael Zorin, Martin Danerud, Dag Winkler, Vladimir Trifonov, Gregory Gol'tsman, Eugeni Gershenzon

Proceedings Volume 2159, (1994) https://doi.org/10.1117/12.176131

KEYWORDS: Modulation, Picosecond phenomena, Carbon dioxide lasers, Resistance, Semiconductor lasers, Pulsed laser operation, Gallium arsenide, Oscillators, Phonons, Diffusion

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Showing 5 of 16 publications

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