摘要:
Structures and methods for reducing wafer bow during heteroepitaxial growth are described. Micro-trenches may be formed across a surface of a substrate and filled with polycrystalline material. Stress-relieving regions of material can be grown over the polycrystalline material in a layer of semiconductor material during heteroepitaxy.
摘要:
Hybrid plasmonic waveguides are described that employ a high-gain semiconductor nanostructure functioning as a gain medium that is separated from a metal substrate surface by a nanoscale thickness thick low-index gap. The waveguides are capable of efficient generation of sub-wavelength high intensity light and have the potential for large modulation bandwidth >1THz.
摘要:
It is provided a transistor vertical-cavity surface-emitting laser, T-VCSEL comprising: a collector section (13) comprising a bottom substrate (11) and a base contacting layer (172), defining the collector region, an emitter section (14) and a base section (16), arranged between the emitter section (14) and the collector section (13), and comprising a collector contacting layer (171) and a light emitting active layer (17), arranged between layers (15, 15') of a base material. The emitter section (14) comprises a current confining blocking layer (110) that comprises a first material layer (112), having a first type of doping and comprising a current confining means (111, 21 1) and a second material layer (19), defining the emitter region, having a second type of doping and being provided on the base side of the material layer (112). This design allows electrical carriers injected from the emitter (14) to flow through the current confining blocking layer (110) confined by the current confining means (111) to arrive at the base (16) and activate the light emitting active layer (17). Methods for fabricating T-VCSELs according to these designs are also provided.
摘要:
A substrate including a body comprising a Group III-V material and having an upper surface, the body comprising an offcut angle defined between the upper surface and a crystallographic reference plane, and the body further having an offcut angle variation of not greater than about 0.6 degrees.
摘要:
Hybrid plasmonic waveguides are described that employ a high-gain semiconductor nanostructure functioning as a gain medium that is separated from a metal substrate surface by a nanoscale thickness thick low-index gap. The waveguides are capable of efficient generation of sub-wavelength high intensity light and have the potential for large modulation bandwidth >1THz.