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Threshold Voltage Engineering in GaN-Based HFETs: A Systematic Study With the Threshold Voltage Reaching More Than 2 V
/forschung/publikationen/kinetics-of-algan-metal-organic-vapor-phase-epitaxy-for-deep-uv-applications
AlxGa1-xN layers with high aluminum content of x ∼ 0.68-0.73 were grown in an 11 × 2-in. AIX 2400 G3 HT planetary reactor by metal-organic vapor phase epitaxy. Growth trends are analyzed by…
DBR tapered diode laser with 12.7 W output power and nearly diffraction-limited, narrowband emission at 1030 nm
/forschung/publikationen/dbr-tapered-diode-laser-with-127-w-output-power-and-nearly-diffraction-limited-narrowband-emission-at-1030-nm
A 1030 nm distributed Bragg reflector (DBR) tapered diode laser with nearly diffraction-limited emission is presented. The laser provides an optical output power of 12.7 W with an…
Multifinger Indium Phosphide Double-Heterostructure Transistor Circuit Technology With Integrated Diamond Heat Sink Layer
/forschung/publikationen/multifinger-indium-phosphide-double-heterostructure-transistor-circuit-technology-with-integrated-diamond-heat-sink-layer
The RF power output of scaled subterahertz and terahertz indium phosphide double-heterostructure bipolar transistors (InP DHBTs) is limited by the thermal device resistance, which increases with the…
Benzocyclobutene dry etch with minimized byproduct redeposition for application in an InP DHBT process
/forschung/publikationen/benzocyclobutene-dry-etch-with-minimized-byproduct-redeposition-for-application-in-an-inp-dhbt-process
In this article we report on the reduction of redeposition during inductively coupled plasma (ICP) etching of benzocyclobutene (BCB) with a soft mask in a sulfur hexafluoride/oxygen (SF6/O2) plasma.…
Correlation of sapphire off-cut and reduction of defect density in MOVPE grown AlN
/forschung/publikationen/correlation-of-sapphire-off-cut-and-reduction-of-defect-density-in-movpe-grown-aln
X-ray diffraction and TEM investigations of MOVPE grown AlN on sapphire with small off-cuts to a- and m-plane reveal the influence of the off-cut direction and angle on the reduction of threading…
Freely Triggerable Picosecond Pulses From a DBR Ridge Waveguide Diode Laser Near 1120 nm
/forschung/publikationen/freely-triggerable-picosecond-pulses-from-a-dbr-ridge-waveguide-diode-laser-near-1120-nm
In this letter, we present results on the pulsed operation of a distributed Bragg reflector ridge waveguide diode laser with wavelength close to 1120 nm. Picosecond optical pulses were generated…
0.25-µm GaN TeraFETs Optimized as THz Power Detectors and Intensity-Gradient Sensors
/forschung/publikationen/025-um-gan-terafets-optimized-as-thz-power-detectors-and-intensity-gradient-sensors
This letter reports on the influence of illumination conditions on the detector response of three-terminal devices. Antenna-coupled field-effect transistors for the plasmonic detection of THz…
Terahertz wave generation from dual wavelength monolithic integrated Distributed Bragg Reflector semiconductor laser diode
/forschung/publikationen/terahertz-wave-generation-from-dual-wavelength-monolithic-integrated-distributed-bragg-reflector-semiconductor-laser-diode
THz wave generation from a dual wavelength distributed Bragg reflector (DBR) semiconductor diode laser connected by an Y-shaped waveguide with photoconductive antennas is demonstrated. Two fibre…
A 56 W Power Amplifier with 2-Level Supply and Load Modulation
/forschung/publikationen/a-56-w-power-amplifier-with-2-level-supply-and-load-modulation
Dynamic load modulation is proposed to improve the efficiency of an RF power amplifier with discrete supply modulation. A 47.5 dBm, 2.7 GHz power amplifier is realized to show the potential…
Challenges in the Design of Wideband GaN-HEMT based Class-G RF-Power Amplifiers
/forschung/publikationen/challenges-in-the-design-of-wideband-gan-hemt-based-class-g-rf-power-amplifiers
In GaN-based power amplifiers (PA) the gain under continuous wave (CW) excitation compresses slowly over a wide power range. Also, due to memory-effects in the GaNHEMT, the gain for modulated…