Large lateral photovoltaic effect in metal-(oxide-) semiconductor structures

Area of Science:

• Physics
• Materials Science
• Electrical Engineering

Background:

• The lateral photovoltaic effect (LPE) offers high sensitivity for position-sensitive detectors.
• LPE output voltage correlates linearly with the position of the incident light spot.
• Applications include detecting extremely small displacements.

Purpose of the Study:

• To review recent research on LPE in metal-semiconductor (MS) and metal-oxide-semiconductor (MOS) structures.
• To present a theoretical model explaining LPE in these specific material systems.

Main Methods:

• Experimental investigations of LPE in fabricated MS and MOS devices.
• Development and application of a theoretical framework for LPE analysis.
• Characterization of photovoltage response to varying light spot positions.

Main Results:

• Demonstrated linear relationship between lateral photovoltage and light spot position in MS and MOS structures.
• Validation of the proposed theoretical model against experimental data.
• Quantification of displacement detection capabilities using LPE.

Conclusions:

• LPE is a viable and sensitive mechanism for high-precision position sensing.
• The theoretical model provides a robust understanding of LPE in MS and MOS systems.
• Further development of LPE-based detectors holds significant potential for advanced applications.