Heejun Byeon
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View article: Sensing and Control of Single Trapped Electrons above 1 K
Sensing and Control of Single Trapped Electrons above 1 K Open
Electrons trapped on the surface of cryogenic substrates (liquid helium, solid neon, or hydrogen) are an emerging platform for quantum information processing made attractive by the inherent purity of the electron environment, the scalabili…
View article: Strong coupling of a microwave photon to an electron on helium
Strong coupling of a microwave photon to an electron on helium Open
Electrons bound to the surface of superfluid helium have been proposed for scalable charge and spin-based quantum computing. However single electron quantum measurement in this system has remained elusive. Here we use a hybrid circuit quan…
View article: High-impedance resonators for strong coupling to an electron on helium
High-impedance resonators for strong coupling to an electron on helium Open
The in-plane motion of an electron on helium can couple to superconducting microwave resonators via electrical dipole coupling, offering a robust and rapid readout scheme. In previous efforts, microwave resonator designs for electrons on h…
View article: Selective and local flash-annealing for improvement in the contact characteristics of MoS <sub>2</sub> transistors
Selective and local flash-annealing for improvement in the contact characteristics of MoS <sub>2</sub> transistors Open
This work reports a groundbreaking and selective flash annealing process that leverages ultrafast photothermal effects induced by flash lamp irradiation to reduce contact resistance in two-dimensional (2D) transition-metal dichalcogenides.
View article: Sensing and Control of Single Trapped Electrons Above 1 Kelvin
Sensing and Control of Single Trapped Electrons Above 1 Kelvin Open
Electrons trapped on the surface of cryogenic substrates (liquid helium, solid neon or hydrogen) are an emerging platform for quantum information processing made attractive by the inherent purity of the electron environment, the scalabilit…
View article: A hermetic on-cryostat helium source for low temperature experiments
A hermetic on-cryostat helium source for low temperature experiments Open
We describe a helium source cell for use in cryogenic experiments that is hermetically sealed in situ on the cold plate of a cryostat. The source cell is filled with helium gas at room temperature and, subsequently, sealed using a cold wel…
View article: A Hermetic On-Cryostat Helium Source for Low Temperature Experiments
A Hermetic On-Cryostat Helium Source for Low Temperature Experiments Open
We describe a helium source cell for use in cryogenic experiments that is hermetically sealed $in$ $situ$ on the cold plate of a cryostat. The source cell is filled with helium gas at room temperature and subsequently sealed using a cold w…
View article: Electric current paths in a Si:P delta-doped device imaged by nitrogen-vacancy diamond magnetic microscopy
Electric current paths in a Si:P delta-doped device imaged by nitrogen-vacancy diamond magnetic microscopy Open
The recently-developed ability to control phosphorous-doping of silicon at an atomic level using scanning tunneling microscopy, a technique known as atomic precision advanced manufacturing (APAM), has allowed us to tailor electronic device…
View article: Current Paths in an Atomic Precision Advanced Manufactured Device Imaged by Nitrogen-Vacancy Diamond Magnetic Microscopy
Current Paths in an Atomic Precision Advanced Manufactured Device Imaged by Nitrogen-Vacancy Diamond Magnetic Microscopy Open
The recently-developed ability to control phosphorous-doping of silicon at an atomic level using scanning tunneling microscopy (STM), a technique known as atomic-precision-advanced-manufacturing (APAM), has allowed us to tailor electronic …
View article: In Situ Ion Counting for Improved Implanted Ion Error Rate and Silicon Vacancy Yield Uncertainty
In Situ Ion Counting for Improved Implanted Ion Error Rate and Silicon Vacancy Yield Uncertainty Open
An in situ counted ion implantation experiment improving the error on the number of ions required to form a single optically active silicon vacancy (SiV) defect in diamond 7-fold compared to timed implantation is presented. Traditional tim…
View article: Current Paths in an Atomic Precision Advanced Manufactured Device Imaged by Nitrogen Vacancy Diamond Magnetic Microscopy.
Current Paths in an Atomic Precision Advanced Manufactured Device Imaged by Nitrogen Vacancy Diamond Magnetic Microscopy. Open
used nitrogen-vacancy (NV) centers in diamond for wide-field magnetic imaging (with a few-mm field of view and micron-scale resolution) of magnetic fields from surface currents flowing in an APAM test device made of a P delta-doped layer o…
View article: Single Photon Emitters Coupled to Photonic Wire bonds
Single Photon Emitters Coupled to Photonic Wire bonds Open
This project will test the coupling of light emitted from silicon vacancy and nitrogen vacancy defects in diamond into additively manufactured photonic wire bonds toward integration into an "on-chip quantum photonics platform". These defec…
View article: Piezoacoustics for flying electron qubits on helium
Piezoacoustics for flying electron qubits on helium Open
Piezoelectric surface acoustic waves (SAWs) are powerful for investigating and controlling elementary and collective excitations in condensed matter. In semiconductors SAWs have been used to reveal the underlying spatial and temporal struc…
View article: Integrating superfluids with superconducting qubit systems
Integrating superfluids with superconducting qubit systems Open
Superfluid helium's low-loss dielectric properties, excellent thermal\nconductivity, and unique collective excitations make it an attractive candidate\nto incorporate into superconducting qubit systems. We controllably immerse a\nthree-dim…
View article: A superfluid-tunable 3D transmon qubit
A superfluid-tunable 3D transmon qubit Open
Superfluid helium at milli-Kelvin temperatures is a dielectric liquid with an extremely low loss tangent at microwave frequencies. As such, it is a promising candidate for incorporation into hybrid quantum systems containing superconductin…
View article: AC response of a macroscopic field effect transistor composed of electrons on helium
AC response of a macroscopic field effect transistor composed of electrons on helium Open
We report on an unconventional $macroscopic$ field effect transistor composed of electrons floating above the surface of superfluid helium. With this device unique transport regimes are realized in which the charge density of the electron …