ABSTRACT
Electronic spin has been widely investigated and used in many areas of research such as electronic and optical spin coherence manipulations with semiconductors [1], spin transport electronics in metals [2], and electronic spin distributions and magneto-electronic properties [3]. However, the limitation of long-distance links has become a problem for electronic spin; therefore, the search for a new technique remains. In practice, optical spin is recommended as a good candidate, because it has shown an advantage over electronic spin, especially for long-distance transportation without electromagnetic interference in the propagating media. Optical spin is recognized as the promising key for future digital and computing technologies, as it can be used for many applications such as semiconductors [4], magnetic tunnel junctions [5], nano-antenna [6], thin-film nanomagnets [7], and cell communication [8]. Several techniques for optical spin generation have been proposed, where the use of nanoparticle optical excitation with circular light is an interesting idea, in which light pulse is used for spin generation and detection [9]. By using the optical orientation, the angular momentum of light is conversed to electronic spin and vice versa [10], which is very efficient in semiconductors. The consequence of this effect assists an important aspect of spintronics, where it is used to spinpolarize electrons, where the optical spin resonance and transverse spin relaxation in magnetic semiconductor quantum wells is achieved. These techniques were used to study the dynamic spin behavior of photo-injected exactions in the embedded magnetic sublattice [11]. Moreover, the optical spin manipulation in electrically pumped vertical-cavity surface-emitting lasers is analyzed [12], which demonstrated the output polarization mix of electrical and optical excitations. After that, the spin magnetic state and the static magnetic field were used to build the AND, OR, XOR (CNOT), and NAND gates by optical spin manipulation [13].
