The papers published in this special issue will report original results of both theory and experiment from a broad field research on devices, systems and subsystem that are intended to combat the ultimate sensing limits or improve their operational safety. The accepted papers should clearly show the originality above the current state of the art. The manuscript is expected to either successfully demonstrate a novel idea or to add the understanding of the previous work. We anticipate the groundbreaking contributions in detecting ultra-weak magnetic field intensities; optical signal that is as weak as the single photon levels, single electron charges. The significant advancement in the detection of high energy radiations such as X-rays and gamma rays via nano science and technologies is also of interest in this special issue. The instrumentation oriented manuscripts should focus on the principles and key physical theory. Such kind of paper should report as simple as possible implementation of those scientific principles that outperforms the existing ones.

A Special issue on International Journal of Optoelectronic Engineering will contain papers and invited review articles on the fundamental and applied aspects of physics in low-dimensional systems (micro and nanostructures), electronic devices including III-V and II-VI based semiconductor heterostructures, quantum wells and superlattices, two-dimensional electron systems, and quantum wires and dots. Both theoretical and experimental contributions are invited. Topics suitable for publication in this journal include spin related phenomena, optical and transport properties, many-body effects, integer and fractional quantum Hall effects, single electron effects and devices, and other novel phenomena. Moreover, this issue will be devoted to the dissemination of the science and technology of synthetic heterostructures, including individual and collective use of semiconductors, metals and insulators for the exploitation of their unique properties.