121 citations · 146 across the 22 of their papers we have counts for
22 papers
Wireless millikelvin interconnects for superconducting quantum hardware
Kristopher Barr, Mingyan Zhong, Euan Parry +8
Scalable quantum computing is limited by the dense network of electrical interconnects linking cryogenic quantum processors to room-temperature control electronics. To overcome thi…
Silicon-based Josephson junction field-effect transistors enabling cryogenic logic and quantum technologies
Yusheng Xiong, Kaveh Delfanazari
The continuous miniaturisation of metal-oxide-semiconductor field-effect transistors (MOSFETs) from long- to short-channel architectures has advanced beyond the predictions of Moor…
Robust NbN on Si-SiGe hybrid superconducting-semiconducting microwave quantum circuit
Paniz Foshat, Samane Kalhor, Shima Poorgholam-khanjari +3
Advancing large-scale quantum computing requires superconducting circuits that combine long coherence times with compatibility with semiconductor technology. We investigate niobium…
On-chip microwave sensing of quasiparticles in tantalum superconducting circuits on silicon for scalable quantum technologies
Shima Poorgholam-Khanjari, Paniz Foshat, Mingqi Zhang +3
The performance and scalability of superconducting quantum circuits are fundamentally constrained by non-equilibrium quasiparticles, which induce microwave losses that limit resona…
Orthogonal Frequency Division Multiplexing Continuous Variable Terahertz Quantum Key Distribution
Mingqi Zhang, Kaveh Delfanazari
We propose a novel continuous-variable quantum key distribution (CVQKD) protocol that employs orthogonal frequency-division multiplexing (OFDM) in the terahertz (THz) band to enabl…
Terahertz source-on-a-chip with decade-long stability using layered superconductor elliptical microcavities
Mingqi Zhang, Shungo Nakagawa, Yuki Enomoto +8
Coherent, continuous-wave, and electrically tunable chip-scale terahertz (THz) sources are critical for emerging applications in sensing, imaging, spectroscopy, communication, spac…
Quasiparticle Dynamics in NbN Superconducting Microwave Resonators at Single Photon Regime
Paniz Foshat, Shima Poorgholam-khanjari, Valentino Seferai +7
Exchanging energy below the superconducting gap introduces quasiparticle energy distributions in superconducting quantum circuits, which will be responsible for their decoherence.…
Engineering high-Q superconducting tantalum microwave coplanar waveguide resonators for compact coherent quantum circuits
Shima Poorgholam-Khanjari, Valentino Seferai, Paniz Foshat +5
Tantalum (Ta) has recently received considerable attention in manufacturing robust superconducting quantum circuits. Ta offers low microwave loss, high kinetic inductance compared…
Statistical evaluation of 571 GaAs quantum point contact transistors showing the 0.7 anomaly in quantized conductance using millikelvin cryogenic on-chip multiplexing
Pengcheng Ma, Kaveh Delfanazari, Reuben K. Puddy +8
The mass production and the practical number of cryogenic quantum devices producible in a single chip are limited to the number of electrical contact pads and wiring of the cryosta…
Ultrafast terahertz superconductor van der Waals metamaterial photonic switch
Kaveh Delfanazari
High-temperature superconductor (HTS) BSCCO-based coherent terahertz (THz) sources have shown great potential as one of the leading solid-state platforms in THz science and technol…
Quantized conductance in split gate superconducting quantum point contacts with InGaAs semiconducting two-dimensional electron systems
Kaveh Delfanazari, Jiahui Li, Yusheng Xiong +11
Quantum point contact or QPC -- a constriction in a semiconducting two-dimensional (2D) electron system with a quantized conductance -- has been found as the building block of nove…
Large-scale on-chip integration of gate-voltage addressable hybrid superconductor-semiconductor quantum wells field effect nano-switch arrays
Kaveh Delfanazari, Jiahui Li, Peng Ma +10
Stable, reproducible, scalable, addressable, and controllable hybrid superconductor-semiconductor (S-Sm) junctions and switches are key circuit elements and building blocks of gate…
Characterizing Niobium Nitride Superconducting Microwave Coplanar Waveguide Resonator Array for Circuit Quantum Electrodynamics in Extreme Conditions
Paniz Foshat, Paul Baity, Sergey Danilin +9
The high critical magnetic field and relatively high critical temperature of niobium nitride (NbN) make it a promising material candidate for applications in superconducting quantu…
Terahertz imaging system with on-chip superconducting Josephson plasma emitters for nondestructive testing
Manabu Tsujimoto, Kaveh Delfanazari, Takanari Kashiwagi +2
Compared with adjacent microwaves and infrared frequencies, terahertz (THz) frequency offers numerous advantages for imaging applications. The unique THz spectral signatures of che…
Millimetre-waves to Terahertz SISO and MIMO Continuous Variable Quantum Key Distribution
Mingqi Zhang, Stefano Pirandola, Kaveh Delfanazari
With the exponentially increased demands for large bandwidth, it is important to think about the best network platform as well as the security and privacy of the information in com…
On-chip visible light communication-band metasurface modulators with niobium plasmonic nano-antenna arrays
Kaveh Delfanazari, Otto L. Muskens
We introduce chip-integrated visible light communication-band modulators based on niobium (Nb) metallic plasmonic nano-antenna arrays. Our plasmonic nano-devices provide strong sen…
Active terahertz modulator and slow light metamaterial devices with hybrid graphene-superconductor photonic integrated circuits
Samane Kalhor, Stephan J. Kindness, Robert Wallis +9
Metamaterial photonic integrated circuits with arrays of hybrid graphene-superconductor coupled split-ring resonators (SRR) capable of modulating and slowing down terahertz (THz) l…
Light-matter interactions in chip-integrated niobium nano-circuit arrays at optical fibre communication frequencies
Kaveh Delfanazari, Otto L. Muskens
The interplay between electronic properties and optical response enables the realization of novel types of materials with tunable responses. Superconductors are well known to exhib…
Millimeter wave to terahertz compact and low-loss superconducting plasmonic waveguides for cryogenic integrated nano-photonics
S. Kalhor, M. Ghanaatshoar, H. J. Joyce +3
Plasmonic, as a rapidly growing research field, provides new pathways to guide and modulate highly confined light in the microwave to the optical range of frequencies. We demonstra…
Experimental evidence for topological phases in the magnetoconductance of 2DEG-based hybrid junctions
Kaveh Delfanazari, Llorenc Serra, Pengcheng Ma +9
While the application of out-of-plane magnetic fields was, so far, believed to be detrimental for the formation of Majorana phases in artificially engineered hybrid superconducting…
Magneto-conductance of topological junctions based on two-dimensional electron gases reveals Majorana phases
Llorenç Serra, Kaveh Delfanazari
We calculate the linear conductance of a two-dimensional electron gas (2DEG)-based junction between a normal semiconductor section and a hybrid semiconductor-superconductor section…
Broadly Tunable Sub-terahertz Emission from Internal Branches of the Current-voltage Characteristics of Superconducting Bi2Sr2CaCu2O8+d Single Crystals
Manabu Tsujimoto, Takashi Yamamoto, Kaveh Delfanazari +8
Continuous, coherent sub-terahertz radiation arises when a dc voltage is applied across a stack of the many intrinsic Josephson junctions in a Bi2Sr2CaCu2O8+d single crystal. The a…