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A lithographic VCSEL approach is used in GaAs-based VCSELs to eliminate the oxide aperture. Record low voltage drive and differential resistance are demonstrated.
Single mode lithographic VCSELs are shown to be capable of unprecedented dense packing into arrays for high pulse power to improve spectral control and beam quality.
Modal properties of single mode lithographic VCSELs are studied for use in densely packed 2-D arrays for improved spectral control, improved beam quality, and high pulse power.
The origin of the deformation in metallic glasses is attributed to rearrangements of atoms in some structurally weak spots behaving as flow units, which are associated with free volumes. In the present study, Xe-ion beam is used to manipulate the free-volume fraction, and influence on the mechanical behavior of a Zr-based metallic glass. The irradiation at low dosages can change the structure by increasing...
Data are presented on 901 nm lithographic vertical-cavity surface-emitting lasers (VCSELs) demonstrating high efficiency for small VCSEL sizes, and stable beam patterns. Power conversion efficiency >40% is obtained for VCSELs ranging in size from 6 to 2 µm diameter. The 2 µm diameter VCSELs produce output powers in excess of 6.5 mW, and produce single-lobed far-field radiation patterns over the...
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