研究目的
Investigating the optical properties and photocurrent generation in helical edge channels of two-dimensional topological insulators based on zinc-blende-type quantum wells.
研究成果
The lack of space inversion symmetry in zinc-blende-type quantum wells enables electro-dipole optical transitions between spin branches of topological edge states, leading to linear and circular dichroism and the generation of polarization-controlled edge photocurrents. The study provides a foundation for understanding and manipulating optical properties of helical edge channels in topological insulators.
研究不足
The study is theoretical and relies on the extended Bernevig-Hughes-Zhang model with interface terms included. Experimental validation is required to confirm the predictions. The analysis is limited to HgTe/CdHgTe quantum wells, and applicability to other materials needs further investigation.
