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Modal analyses of Talbot cavity eigenmodes are performed for a finite diode laser array using a simple finite external mirror and a patterned external mirror. At a full round‐trip Talbot length, the in‐phase and oscillating‐phase modes of the cavity with a simple flat mirror have slightly...
Lateral transport in a coupled double quantum well has been studied in a system where each layer can be measured independently. Front and back gates were used to vary the carrier densities in the two wells and hence control the degree of electron coupling. When the carrier densities in the two...
We investigate wave propagation in a superlattice consistent of dielectric material with a nonlinear Kerr coefficient. We find gaps in the propagating properties of the medium that depend critically on the injected wave power. This property can be used for transmission of information.
High quality Nb/Al‐AlO x /Nb Josephson tunnel junctions have been fabricated using a novel process named the selective trilayer deposition process. The junction is formed on a patterned Nb underlayer through the lift‐off deposition of a Nb/Al‐AlO x /Nb trilayer. Anodization then provides...
We performed low temperature photoluminescence excitation and photocurrent measurements on tensile and compressively strained Ga x In 1− x As quantum‐well layers grown on GaInAsP, which was lattice matched to the InP substrate. From these measurements the excitonic transitions in the...
The synthesis and electron microscopic studies of TaC single crystals encapsulated in carbon nanotubes are reported. The crystal structure is the NaCl type with the lattice parameter a 0 =4.455±0.003 Å. The typical crystalline size is ∼7 nm. The epitaxial growth of carbon nanotube on the...
The first observation of band structure phenomena arising from the degeneracy of barrier and well resonances in suitably designed superlattices is reported. These effects are characterized by the formation of new minibands and the suppression of a minigap at a Brillouin zone boundary leading to...
Cadmium fluoride single crystal layers have been grown on CaF 2 /Si(111) or Si(111) substrates by molecular beam epitaxy. The structures are expected to have attractive electronic properties. The growth was monitored by reflections high energy electron diffraction (RHEED) techniques. A distinct...
Near diffraction limited output from a slab waveguide carbon monoxide gain medium using a hybrid confocal unstable resonator is described. A device producing a cw output of 80 W in a beam with M 2 =1.5 has been demonstrated operating with 12% efficiency at −30 °C.
Chemical vapor deposition of SiC on Si (111) from silacyclobutane ( c ‐C 3 H 6 SiH 2 , SCB) has been carried out on propane carbonized and on virgin Si substrates. The carbonization was performed at 760 Torr and the SiC growth at 5 Torr. Transmission electron diffraction (TED) and x‐ray...
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