2025/08/30 by Rodriguez-Barrios, Gustavo M., Baydin, Andrey, Doumani, Jacques +3 · 1 citation
#FOS: Physical sciences #Optics (physics.optics)
paper · doi:10.48550/arxiv.2509.00330
Chiral optical terahertz (THz) devices have significant technological implications for telecommunications, spectroscopy, and sensing. Engineering tunable, broadband, and cost-effective THz chiral materials has long been recognized as a challenging endeavor and has been the bottleneck hindering the full exploitation of the THz spectrum. Here, we present an artificial structure based on aligned carbon nanotube films that exhibit a tunable broadband circular dichroism (CD) up to 2.8 degrees. Its behavior is reciprocal. The developed theoretical simulations are in agreement with the experiments and predict a further increase of CD signal up to ~30 degrees when more CNT layers are added.