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Vi Systems Gmbh patents


Recent patent applications related to Vi Systems Gmbh. Vi Systems Gmbh is listed as an Agent/Assignee. Note: Vi Systems Gmbh may have other listings under different names/spellings. We're not affiliated with Vi Systems Gmbh, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "V" | Vi Systems Gmbh-related inventors


Optoelectronic device with resonant suppression of high order optical modes and method of making same

Optical beam quality of an optoelectronic device is improved by suppression of high-order transverse optical modes by their resonant interaction with the continuum of modes in the surrounding regions, such continuum being realized by replacement of one or several layers by layers having a lower refractive index. In particular, selective oxidation of gaalas-based vertical cavity surface emitting laser results in (ga)alo layers surrounding the aperture and having a lower refractive index than the original (ga)alas layers. ... Vi Systems Gmbh

Three-dimensional semiconductor nanoheterostructure and method of making same

A method for fabrication of three-dimensional nanostructures on top of the surface of a first solid state material is disclosed, which includes steps of (i) deposition of a layer of a second solid state material forming a stable layer-like coverage of the surface, (ii) the subsequent deposition of a third solid state material, having a stronger binding energy with the first solid state material than the second solid state material, (iii) wherein the third solid state material replaces the second solid state material forming an interface with the first material and thus reduces the energy of the system, and (iv) where the resulting excess second solid state material forms three-dimensional nanostructures. The structure can be covered with another (fourth) solid state material, which eventually can be the same as the first material or a different one, and the three dimensional nanostructures form capped quantum dots or quantum wires. ... Vi Systems Gmbh

Low capacitance optoelectronic device

An optoelectronic semiconductor device is disclosed wherein the device is a vertical-cavity surface-emitting laser or a photodiode containing a section, the top part of which is electrically isolated from the rest of the device. The electric isolation can be realized by etching a set of holes and selective oxidation of algaas layer or layers such that the oxide forms a continuous layer or layers everywhere beneath the top surface of this section. ... Vi Systems Gmbh

Reliable high-speed oxide-confined vertical-cavity surface-emitting laser

An oxide-confined vertical cavity surface emitting laser including a distributed bragg reflector (dbr) wherein the layers of the (dbr) includes a multi-section layer consisting of a first section having a moderately high aluminum composition, an second section which is an insertion having a low aluminum composition, and a third section which is an oxide-confined aperture formed by partial oxidation of a layer having a high aluminum composition (95% and above). A difference in aluminum composition between a high value in the aperture layer and a moderately high value in the first section prevents non-desirable oxidation of the first section from the mesa side while the aperture layer is being oxidized. ... Vi Systems Gmbh








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