Self-Powered Filterless On-Chip Full-Stokes Polarimeter.

Area of Science:

• Photonics and Optoelectronics
• Materials Science
• Nanotechnology

Background:

• Polarization detection is crucial for photonic and optoelectronic devices.
• Existing polarimeters often involve complex fabrication with waveplates or metasurfaces, leading to energy loss.
• There is a need for compact, efficient, and filterless on-chip polarimeters.

Purpose of the Study:

• To demonstrate a self-powered, filterless on-chip full-Stokes polarimeter.
• To utilize a single-layer MoS₂/few-layer MoS₂ homojunction for polarization sensing.
• To overcome the limitations of current polarimeter designs.

Main Methods:

• Fabrication of a single-layer MoS₂/few-layer MoS₂ homojunction.
• Exploitation of the circular photogalvanic effect and optical anisotropy of MoS₂.
• Operation at zero bias without external filtering layers.

Main Results:

• Successful demonstration of a self-powered, filterless on-chip full-Stokes polarimeter.
• Sensing of four Stokes parameters for incident light in the 650-690 nm range with acceptable accuracy.
• Device integration compatibility with silicon-based chips.

Conclusions:

• The MoS₂ homojunction offers a high-performance, compact, and filterless solution for on-chip polarimetry.
• This approach simplifies polarimeter design and reduces energy consumption.
• The study presents a new paradigm for advanced photonic and optoelectronic devices.