Improving the Spatial Resolution of Silicon Pixel Detectors through Sub-pixel Cross-coupling

Abstract

We present a concept to improve the spatial resolution of silicon pixel-detectors via the implementation of position dependent inter-pixel cross-coupling. By segmenting the readout implantations and AC-coupling the sub-pixels, a part of the pixel charge is shared with neighboring pixels. For example, such a sensor can be realized in radiation tolerant high-voltage CMOS processes facilitating its application in modern particle colliders. Simulations to study the impact of different coupling capacitances on the spatial resolution are presented and an improvement of the spatial resolution by approximately 40 % is demonstrated.