Journal
NANOPHOTONICS
Volume 11, Issue 10, Pages 2341-2348Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2022-0036
Keywords
metamaterials; nematic liquid crystals; optical nonlinearity; terahertz
Categories
Funding
- UK Engineering and Physical Sciences Research Council [EP/R024421/1]
- Military University of Technology of Warsaw [22-793/2022]
Ask authors/readers for more resources
This study investigates the Babinet complementary patterns of a liquid crystal-loaded metamaterial and finds that the sensitivity to refractive index variations differs for the two complementary patterns. Furthermore, the experimental data show that it is possible to shift the resonance beyond the alignment mismatch limit.
Babinet complementary patterns of a spectrally tunable metamaterial incorporating a nematic liquid crystal is normally assumed to exhibit the same tuning range. Here we show that for a hybrid, liquid crystal-loaded metamaterial, the sensitivity of its terahertz resonances to the variations of the refractive index differs substantially for the two complementary patterns. This is due to a mismatch between the alignment of the liquid crystal and the direction of the local electric field induced in the metamaterial patterns. Furthermore, and more intriguingly, our experimental data indicate that it is possible to shift the resonance of the positive metamaterial pattern beyond the limit imposed by the alignment mismatch. Our analysis suggests that the observed anomalous frequency shift results from the orientational optical nonlinearity of a nematic liquid crystal.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available