Innovative remotely-controlled bending device for thin silicon and germanium crystals

Strained germanium thin film membrane on silicon substrate for optoelectronics.

This work presents a novel method to introduce a sustainable biaxial tensile strain larger than 1% in a thin Ge membrane using a stressor layer integrated on a Si substrate. Raman spectroscopy confirms 1.13% strain and photoluminescence shows a direct band gap reduction of 100meV with enhanced light emission efficiency. Simulation results predict that a combination of 1.1% strain and heavy n(+)...

Device Parameter Optimization of Silicon Germanium HBT for THz Applications

Now-a-days SiGe HBTs are surpassing even the fastest III-V production devices in the high–speed orbit. The state-of-art in simulation of silicon germanium semiconductor devices is presented in this paper. A comprehensive course of action to model the device parameter characterization of High Frequency 0.1μm SiGe HBT is depicted which is based on the technique of direct parameter extraction. Wit...

Photoresponsive rolling and bending of thin crystals of chiral diarylethenes.

Dithienylhexafluorocyclopentene with (R)- or (S)-N-phenylethylamide substituents formed rod-like and 0.2-1.0 microm-thick platelike crystals by sublimation; upon UV irradiation, the crystals bent concavely to the incident light and finally rolled crystals were obtained; the bent crystals were reconverted to flat crystals by visible light irradiation.

Crystallization of Electrodeposited Germanium Thin Film on Silicon (100)

We report the crystallization of electrodeposited germanium (Ge) thin films on n-silicon (Si) (100) by rapid melting process. The electrodeposition was carried out in germanium (IV) chloride: propylene glycol (GeCl₄:C₃H₈O₂) electrolyte with constant current of 50 mA for 30 min. The measured Raman spectra and electron backscattering diffraction (EBSD) images show that the as-deposited Ge thin fi...

Thermopower of nanocrystalline germanium/hydrogenated amorphous silicon composite thin films