Quantum Cascade Lasers (QCLs) are currently the best electrically-pumped sources of Terahertz (THz) radiation regarding output power, linewidth, operating temperatures and efficiency. THz QCLs offer a wide field of applications ranging from astrophysics and security screening to ultrafast spectroscopy in chemistry or biology. For all these applications THz QCLs which can operate at moderate temperature are desired.<br><br> <p><strong>Technology</strong><br> The invention is a THz Quantum Cascade Laser with improved temperature performance. The THz QCL uses a strain-compensated (Al, Ga, In)As material grown on InP substrates.<br> <br>
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For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
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Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
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