The circular Bragg phenomenon

M Faryad, A Lakhtakia - Advances in Optics and Photonics, 2014 - opg.optica.org
Exhibited by structurally chiral materials—such as Reusch piles, cholesteric liquid crystals
(CLCs), and chiral sculptured thin films (STFs)—due to their helical nonhomogeneity along a …

Chiral mirror and optical resonator designs for circularly polarized light: suppression of cross-polarized reflectances and transmittances

IJ Hodgkinson, M Arnold, MW McCall, A Lakhtakia - Optics …, 2002 - Elsevier
A left-handed chiral sculptured thin film (STF) that reflects strongly at the wavelength of the
circular Bragg resonance tends to partially convert the handedness of incident LCP (left …

On temporally periodic physical vapor deposition on random rough surfaces

RA Fiallo, C Li, A Lakhtakia… - Journal of …, 2023 - spiedigitallibrary.org
Temporally periodic physical vapor deposition (TP-PVD) is commonly used to fabricate
Bragg mirrors on planar surfaces. These devices are notionally of infinite transverse extent …

Experimental investigation of circular Bragg phenomenon for oblique incidence

S Erten, A Lakhtakia, GD Barber - JOSA A, 2015 - opg.optica.org
A 20-period-thick chiral sculptured thin film (STF) of zinc selenide was fabricated on a glass
slide by thermal evaporation. A variable-angle spectroscopic system was devised and used …

Specular and nonspecular, thickness-dependent, spectral holes in a slanted chiral sculptured thin film with a central twist defect

F Wang, A Lakhtakia - Optics communications, 2003 - Elsevier
We demonstrate analytically that two types of spectral holes located approximately in the
center of the Bragg regime could be exhibited by a slanted chiral sculptured thin film (STF) …

Pseudo‐isotropic and maximum‐bandwidth points for axially excited chiral sculptured thin films

A Lakhtakia - Microwave and Optical Technology Letters, 2002 - Wiley Online Library
Chiral sculptured thin films (STFs) are periodically anisotropic, and exhibit the circular Bragg
phenomenon over a certain wavelength regime on axial excitation. Among the key …

Explicit expressions for spectral remittances of axially excited chiral sculptured thin films

MW McCall, A Lakhtakia - Journal of Modern Optics, 2004 - Taylor & Francis
A theory of reflection and transmission of normally incident plane waves to a chiral
sculptured thin film (CSTF) is presented. It is based on a coupled wave approach, in which …

Multiple Bragg regimes exhibited by a chiral sculptured thin film half-space on axial excitation

J Wang, A Lakhtakia, JB Geddes III - Optik, 2002 - Elsevier
Axially excited chiral sculptured thin films (STFs) are shown to display the circular Bragg
phenomenon in more than one wavelength-regime, owing to the dispersion inherent in their …

Simple expressions for Bragg reflection from axially excited chiral sculptured thin films

A Lakhtakia, M McCALL - Journal of Modern Optics, 2002 - Taylor & Francis
Reported here is the derivation of analytic expressions for the reflection coeffcients of a
halfspace filled by a chiral sculptured thin film (STF) that is axially excited by a normally …

Numerical investigation of reflection, refraction, and diffraction of pulsed optical beams by chiral sculptured thin films

JB Geddes III, A Lakhtakia - Optics communications, 2005 - Elsevier
We study the scattering of pulsed optical beams from chiral sculptured thin films (STFs). The
spatiotemporal anatomy of the circular Bragg phenomenon (CBP) exhibited by chiral STFs is …