Past Reseach

Magnetic sensors, especially, Hall effect sensors are ubiquitous, being used in the electronics industry for monitoring rotation in optical memory disks, banknote authentication in vending machines, and for sensing currents in cables. Recent industrial trends indicate increasing demand for magnetic sensors for monitoring magnetic fields in outer space and nuclear power stations, which is extremely challenging because sensors for such applications must withstand extreme fluctuations in temperature as well as harmful radiation in these environments.

In order to resolve these issues, we studied HEMTs structures and Hall effect sensors based on two-dimensional electron gas (2DEG), such as AlGaN/GaN and AlGaAs/GaAs heterostructure, and AlInSb/InAsSb/AlInSb quantum wells, under high temperature and high proton irradiation. (See more).

Thin films are widely used in electronic semi-conductor devices and optical coatings. The chemical techniques used for thin films deposition, unlike physical techniques, are inexpensive; however, the thin films obtained are of poor quality compared with those obtained by physical methods. The successive ionic layer adsorption and reaction (SILAR) method, one of the newest techniques for the thin films’ deposition, is low-cost, low-temperature, and eco-friendly, where neither sophistical equipment nor a high vacuum chamber are needed. SILAR proceeds via a layer-by-layer fabrication of a thin film (See more).