This project is within the field of semiconductor spintronics that promises realization of spin-based active components for electronic circuits. The objective of the present project, supported by the Carl Trygger Foundation for the years 2022-2024, is to investigate theoretically spin polarization and spin-dependent electron transport through electronic lens embedded in a wide quantum wire (QW) fabricated in GaAs/AlGaAs heterostructure. The experimental setup consists of three quantum point contacts (QPCs), with two of them functioning as spin injectors and the third acting as a spin detector. The main aim of this research is to study the possibility of implementing an electronic lens within a QW with shallow confinement, using an experimentally proposed electron focusing device that incorporates an asymmetrically loaded QPC. Spin-dependent transport through this asymmetrically loaded QPC is tested by the electronic lens and the spin detector QPC.