Dynamically Reconfigurable Polarization in Elastomeric Semiconductors for Stretchable Chiroptoelectronics

Stretchable optoelectronics capable of dynamically controlling and detecting circularly polarized light offer transformative potential for wearable optoelectronic computing, biomimetic sensing, and photonic communication. However, conventional polarization-sensitive materials based on rigid birefringent optical crystals or chiral organic compounds inherently lack mechanical adaptability and reversible polarization tunability. Here, we introduce a mechanically robust, stretchable composite based on alignment-controllable semiconducting polymer nanofibers embedded in an elastomer matrix, which exhibits dynamically tunable optical activity through mechanical deformation and/or angular layer assembly. By stacking individual layers at controlled twist angles, we achieve highly sensitive chiroptical detection in the near-infrared range even under mechanical deformation (up to 50 % uniaxial and 30 % biaxial strain) for stretchable optoelectronics. Furthermore, our devices demonstrate reliable optoelectrical performance with high reproducibility under repeated stretching cycling, maintaining polarization-selective transistor functionality and enabling mechanically programmable optical logic gates (AND, XNOR). Our findings establish a transformative paradigm for mechanically adaptive chiroptoelectronics, enabling skin-integrated photonic sensing and computing.