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We report a technique for producing single-mode buried channel waveguide lasers in neodymium-doped SiO 2 :GeO 2 :B 2 O 3 :Na 2 O SiO 2 : GeO 2 : B 2 O 3 : Na 2 O (SGBN) glass. Direct bonding forms the basis of this process, providing a buried waveguide layer in the photosensitive SGBN material...
Precision measurements of the microwave surface resistance R s R s of in situ MgB 2 MgB 2 films directly reveal an exponential behavior of R s R s at low temperature indicating a fully-gapped order parameter. The entire temperature dependence of R s R s is well described by a Mattis–Bardeen...
We report on the fabrication and operation of integrated gated field emission devices using single vertically aligned carbon nanofiber (VACNF) cathodes where the gate aperture has been formed using a self-aligned technique based on chemical mechanical polishing. We find that this method for...
The kinetics of the interfacial layer (IL) growth between Hf aluminates and the Si substrate during high-temperature rapid thermal annealing (RTA) in either N 2 N 2 ( ∼ 10 Torr) ( ∼ 10 Torr ) or high vacuum ( ∼ 2×10 −5 Torr) ( ∼ 2 × 1 0 − 5 Torr ) is studied by high-resolution x-ray...
Near-field two-photon optical lithography is demonstrated by using ∼120 fs laser pulses at 790 nm in an apertureless near-field optical microscope, which produces lithographic features with ∼70 nm resolution. The technique takes advantage of the field enhancement at the extremity of a...
We present a method for quantitative measurement of electrical conductivity of semiconductor wafers in a contactless fashion by using millimeter waves. A focusing sensor was developed to focus a 110 GHz millimeter wave beam on the surface of a silicon wafer. The amplitude and the phase of the...
We report the most recent advance in the area of type II InAs/GaSb superlattice photovoltaic detectors that have cutoff wavelengths beyond 25 μm, with some at nearly 32 μm. The photodiodes with a heterosuperlattice junction showed Johnson noise limited peak detectivity of 1.05×10 10 cm Hz 1/2...
Block copolymer lithography makes use of the self-assembling properties of block copolymers to pattern nanoscale features over large areas. Although the resulting patterns have good short-range order, the lack of long-range order limits their utility in some applications. This work presents a...
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