By providing an asymmetric design of a halo region and extension regions of a field effect transistor, the transistor performance may significantly be enhanced for a given basic transistor architecture. In particular, a large overlap area may be created at the source side with a steep concentration gradient of the PN junction due to the provision of the halo region, whereas the drain overlap may be significantly reduced or may even completely be avoided, wherein a moderately reduced concentration gradient may further enhance the transistor performance.