Abstract: The present invention relates integrated optoelectronic devices comprising light emitting field-effect transistors. We describe an optoelectronic device comprising a light-emitting field effect transistor (LFET) with an organic semiconductor active layer and a waveguide integrated within the channel of the light-emitting field effect transistor, wherein said waveguide comprises a material which has a higher refractive index than said organic semiconductor. We also describe a light-emitting organic field transistor integrated with a ridge or rib waveguide incorporated within the channel of the LFET; and a similar light-emitting organic field effect transistor in which the waveguide incorporates an optical feedback mechanism.

Abstract: A metamaterial having a negative refractive index is presented, which has a dielectric carrier material (12; 48), first electrically conductive sections (14.1, 14.2, 14.3, 14.4) and second electrically conductive sections (16.1, 16.2). The metamaterial is distinguished by the fact that the dielectric carrier material (12; 48) is realized as a volume which consists of one piece and which has at least one inner area which is prestructured by positive or negative rib or mesa structures (52.1, 52.2) in the dielectric carrier material (48) and is covered with first sections (14.1, 14.2, 14.3, 14.4) and second sections (16.1, 16.2) in such a way that the first sections form capacitive series impedances upon illumination with an electromagnetic wave having a specific propagation direction and polarization, while the second sections are arranged in such a way that they form inductive shunt impedances upon the illumination.

Abstract: A metamaterial having a negative refractive index is presented, which has a dielectric carrier material (12; 48), first electrically conductive sections (14.1, 14.2, 14.3, 14.4) and second electrically conductive sections (16.1, 16.2). The metamaterial is distinguished by the fact that the dielectric carrier material (12; 48) is realized as a volume which consists of one piece and which has at least one inner area which is prestructured by positive or negative rib or mesa structures (52.1, 52.2) in the dielectric carrier material (48) and is covered with first sections (14.1, 14.2, 14.3, 14.4) and second sections (16.1, 16.2) in such a way that the first sections form capacitive series impedances upon illumination with an electromagnetic wave having a specific propagation direction and polarization, while the second sections are arranged in such a way that they form inductive shunt impedances upon the illumination.

Abstract: A radiation-emitting semiconductor component having a semiconductor body (1), which has a radiation-generating active layer (9) and a p-conducting contact layer (2), which contains InGaN or AlInGaN and to which a contact metalization (3) is applied.

Abstract: A radiation-emitting semiconductor component having a semiconductor body (1), which has a radiation-generating active layer (9) and a p-conducting contact layer (2), which contains InGaN or AlInGaN and to which a contact metalization (3) is applied.

Abstract: A holding element serves for the vertical fixation of a pane of glass to be glued in the frame of a motor vehicle. It consists of a holding part made of a hard elastic plastic inserted in a lower cross frame and a number of elastically insertable supporting steps connected to it with supporting faces arranged at equal distances one above the other to support the lower edge of the pane. In order to achieve the finest possible gradation of the individual supporting steps and simultaneously a no-play mounting, the supporting steps are designed to engage one another in a lamellar manner and are connected in each case to the holding part on both sides of the support area via elastically flexible cross members on their lamellar ends.

Abstract: A semiconductor laser that is monolithically integrated on a substrate and whose cavity has a branched structure that is simply contiguous in a topological sense, and which includes a plurality of regions that enclose the cavity, is operated as a mode-locked semiconductor laser, with an alternating current flowing through at least one region in addition to a direct current. The frequency of the alternating current is related to the reciprocal of the round-trip time or an integral multiple of this reciprocal of light pulses generated by the alternating current in the semiconductor laser.

Abstract: A holding device for vertically positioning a windshield or rear window so that it can be bonded into the frame of a motor vehicle. It has a holding part which can be inserted into a lower transverse part of the frame and a series of support steps transversely spaced from one another in a direction parallel to the transverse part of the frame and pivotally connected to the holding part so that they can individually and elastically pivot out to a holding position or be pressed into an out-of-the way position. The steps each have a support face, the faces being arranged in step wise fashion at an equal vertical distance from each other.

Abstract: A semiconductor laser which includes a controllable beam splitter has three segments including laser-active zones and a monitor diode forming a cross-shaped laser connected with one another by way of the beam splitter. The beam splitter is equipped with electrodes for controlling optical coupling between the segments.

Abstract: A semiconductor laser in which the photons injected from its waveguide region into the laser active region are those whose energies differ from the energy sum of the chemical potential of the electron-hole pairs and the energy of the longitudinal acoustic phonons by less than one-half the thermal energy is described. A current directed into the photon emission region in the area of the Bragg grating causes photons of this energy to be injected into the laser active region which is constituted of a layer of indium gallium arsenide phosphide.

Abstract: The disclosure concerns a multiple-spline hub that is particularly useful for a telescopic shaft for transmitting torque. There is a thin-walled tube section which is developed as a toothed profile tube having teeth of trapezoidal cross-section. There is a thicker-walled tube to which the connecting element of the telescopic shaft, such as a joint fork, is attached. The toothed tube section is inserted in the bore of the thicker-walled tube and the crests of the teeth of the tube section engage the interior surface of the bore of the tube. The crests of the teeth are bonded by brazing to the bore of the thicker-walled tube.

Abstract: A coupling having two coupling members with engaging faces; each face has a plurality of annular, concentric ribs of trapezoidal cross-section and grooves correspondingly shaped to receive the ribs on the other face; less than the entire contact area of each face is ribbed; a spigot on one in a recess coupling member is received for initially positioning the coupling members; devices for clamping the coupling members together.

Abstract: A holding device for vertically positioning a windshield or rear window so that it can be bonded into the frame of a motor vehicle. It has a holding part which can be inserted into a lower transverse part of the frame and a series of support steps transversely spaced from one another in a direction parallel to the transverse part of the frame and pivotally connected to the holding part so that they can individually and elastically pivot out to a holding position or be pressed into an out-of-the way position. The steps each have a support face, the faces being arranged in step wise fashion at an equal vertical distance from each other.