109 citations · 433 across the 18 of their papers we have counts for
8 papers · 1 filter
Electromagnetic response of the surface states of a topological insulator nanowire embedded within a resonator
Shimon Arie Haver, Eran Ginossar, Sebastian E. de Graaf +1
Exploring the interplay between topological phases and photons opens new avenues for investigating novel quantum states. Here we show that superconducting resonators can serve as s…
Electronic confinement of surface states in a topological insulator nanowire
Ruchi Saxena, Eytan Grosfeld, Sebastian E de Graaf +4
We analyze the confinement of electronic surface states in a model of a topological insulator nanowire. Spin-momentum locking in the surface states reduces unwanted backscattering…
Spin echo silencing using a current-biased frequency-tunable resonator
V. Ranjan, Y. Wen, A. K. V. Keyser +5
The ability to control microwave emission from a spin ensemble is a requirement of several quantum memory protocols. Here, we demonstrate such ability by using a resonator whose fr…
Quantitative infrared near-field imaging of suspended topological insulator nanostructures
C. Lupo, J. Andzane, D. Montemurro +5
The development of nanoscale solid-state devices exploiting the promising topological surface states of topological insulator materials requires careful device engineering and impr…
Coupling of a locally implanted rare-earth ion ensemble to a superconducting micro-resonator
I. Wisby, S. E. de Graaf, R. Gwilliam +5
We demonstrate the coupling of rare-earth ions locally implanted in a substrate (Gd in AlO) to a superconducting NbN lumped-element micro-resonator. The hybrid d…
A near-field scanning microwave microscope based on a superconducting resonator for low power measurements
S. E. de Graaf, A. V. Danilov, A. Adamyan +1
We report on the design and performance of a cryogenic (300 mK) near-field scanning microwave microscope. It uses a microwave resonator as the near-field sensor, operating at a fre…
Dynamic parity recovery in a strongly driven Cooper-pair box
S. E. de Graaf, J. Leppäkangas, A. Adamyan +6
We study a superconducting charge qubit coupled to an intensive electromagnetic field and probe changes in the resonance frequency of the formed dressed states. At large driving st…
Effects of quasiparticle tunneling in a circuit-QED realization of a strongly driven two-level system
J. Leppäkangas, S. E. de Graaf, A. Adamyan +5
We experimentally and theoretically study the frequency shift of a driven cavity coupled to a superconducting charge qubit. In addition to previous studies, we here also consider d…