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We perform simulations to model electron energy loss spectroscopy of aluminum nanodisk surface plasmons. Nanodisk geometry and e-beam position determine excitation and energy of plasmonic modes. Multipolar modes are explained with a circulating waveguide model.
We illuminate resonant and off-resonant plasmonic nanoparticles with few-cycle laser pulses and measure strong-field photoemission. Recording interferometric autocorrelations with the strong-field photocurrent, we study the response of the nanoparticle near-fields to ultrafast excitation.
We demonstrate sub-10 nm transistor channel lengths by directed self-assembly patterning of monolayer MoS2 in a periodic chain of homojunction semiconducting-(2H) and metallic-phase (1T') MoS2 regions with half-pitch of 7.5 nm. The MoS2 composite transistor possesses an off-state current of 100 pA/µm and an Ion/Ioff ratio in excess of 105. Modeling of the resulting current-voltage characteristics...
We present progress on a scalable scheme for integration of single-photon detectors with silicon and aluminum nitride photonic circuits. We assemble arrays of low-jitter waveguide-integrated single-photon detectors and show up to 24% system detection efficiency.
In this work we demonstrate the design, fabrication and characterization of ultrafast, surface-plasmon enhanced Au nanorod photofield emitter arrays. We present a quantitative analysis of charge yield from plasmonic Au nanorod arrays fabricated by high-resolution electron beam lithography and triggered by 35 fs pulses of 800 nm light. We have accurately modeled both the optical field enhancement of...
We developed a scalable method for integrating sub-70-ps-timing-jitter superconducting nanowire single-photon detectors with photonic integrated circuits. We assembled a photonic chip with four integrated detectors and performed the first on-chip g(2)(τ)-measurements of an entangled-photon source.
Strong-field photoemission from plasmonic nanoparticles is demonstrated on the surface of a chip under ambient conditions. The photoemission shows a carrier-envelope phase-sensitive component with a 27 dB signal-to-noise ratio at a 0.78 Hz resolution bandwidth.
In this work we investigate the use of Au nanorods as optically actuated electron emitter arrays. We have fabricated high-density arrays of 10 nm diameter Au nanorods via electron beam lithography and studied the effects of, emitter array density on charge yield, and laser intensity on emitter morphology, respectively. Additionally, we have numerically simulated the magnitude of the local electric...
We integrated superconducting nanowire single-photon detectors on sub-400-nm-thick silicon nitride membranes, which can then be transferred and aligned to photonic structures on a secondary chip with sub-micron placement accuracy.
We present here a hybrid approach to modeling helium‐ion lithography that combines the power and ease‐of‐use of the Stopping and Range of Ions in Matter (SRIM) software with the results of recent work simulating secondary electron (SE) yield in helium‐ion microscopy. This approach traces along SRIM‐produced helium‐ion trajectories, generating and simulating trajectories for SEs using a Monte Carlo...
We developed superconducting nanowire single-photon detectors (SNSPDs) based on 30-nm-wide nanowires, which showed 2.6 % detection efficiency at 5 μm wavelength.
We propose a design for cavity-integrated Superconducting Nanowire Single-Photon Detectors based on 20-nm-wide 10-nm-thick nanowires. Our simulations show that these detectors can potentially reach ∼90% device detection efficiency.
Several advances in high-detection-efficiency superconducting nanowire single photon detectors (SNSPDs) including multi-layer optical structures and multi-element geometries make them uniquely suited to applications in the short-wave infrared.
Superconducting nanowire single-photon detectors show exceptional performance for quantum information processing, but several developments promise further progress, including new signal-amplification methods and efficient devices in the mid-infrared.
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