27 February 2015 The circular Bragg phenomenon for oblique incidence
Author Affiliations +
Structurally chiral materials exhibit the circular Bragg phenomenon (CBP). These materials preferentially reflect circularly polarized light of the same handedness while transmitting circularly polarized light of the opposite handedness within a range of wavelengths called the circular Bragg regime. The CBP has been extensively investigated experimentally for normal incidence, but not for oblique incidence. After fabricating a 20-periodthick chiral sculptured thin film, we measured all of its circular remittances over a 60◦ range of the angle of incidence and a 300-nm range of the free-space wavelength. Provided the incidence is not very oblique, the obtained dependencies of the center wavelength and the bandwidth of the CBP on the angle of incidence match theoretical estimates.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sema Erten, Sema Erten, Akhlesh Lakhtakia, Akhlesh Lakhtakia, Greg D. Barber, Greg D. Barber, } "The circular Bragg phenomenon for oblique incidence", Proc. SPIE 9371, Photonic and Phononic Properties of Engineered Nanostructures V, 93710J (27 February 2015); doi: 10.1117/12.2084970; https://doi.org/10.1117/12.2084970

Back to Top