Birefringent Thin Films and Polarizing Elements

McCall, Martin W.; Hodgkinson, Ian J.; Wu, Qihong

doi:10.1142/p962

Cited by 40 publications

(46 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dispersion in the middle of the stop band is moderate. Thus, we believe the set of linear differential equations, Equation (26), provides an adequate description of the model when L ≥ 5p and δ = 0.1. Beyond this approximation, the eigenfrequency depends on the cholesteric layer thickness and is possible to describe through the approach proposed in [10].…”

Section: Tcmt Applicability Limitsmentioning

confidence: 99%

See 1 more Smart Citation

Chiral Optical Tamm States: Temporal Coupled-Mode Theory

et al. 2017

View full text Add to dashboard Cite

Abstract:The chiral optical Tamm state (COTS) is a special localized state at the interface of a handedness-preserving mirror and a structurally chiral medium such as a cholesteric liquid crystal or a chiral sculptured thin film. The spectral behavior of COTS, observed as reflection resonances, is described by the temporal coupled-mode theory. Mode coupling is different for two circular light polarizations because COTS has a helical structure replicating that of the cholesteric. The mode coupling for co-handed circularly polarized light exponentially attenuates with the cholesteric layer thickness since the COTS frequency falls into the stop band. Cross-handed circularly polarized light freely goes through the cholesteric layer and can excite COTS when reflected from the handedness-preserving mirror. The coupling in this case is proportional to anisotropy of the cholesteric and theoretically only anisotropy in magnetic permittivity can ultimately cancel this coupling. These two couplings being equal result in a polarization crossover (the Kopp-Genack effect) for which a linear polarization is optimal to excite COTS. The corresponding cholesteric thickness and scattering matrix for COTS are generally described by simple expressions.

show abstract

Section: Tcmt Applicability Limitsmentioning

confidence: 99%

“…The quality factor saturates with increasing cholesteric thickness and circular polarization of the transmitted light changes from co-handed to cross-handed. This polarization crossover [17] is termed the Kopp-Genack effect [26]. Unlike the Fabry-Perot resonator, the twist defect generates a single localized state.…”

Section: Introductionmentioning

confidence: 99%

Chiral Optical Tamm States: Temporal Coupled-Mode Theory

et al. 2017

View full text Add to dashboard Cite

show abstract

“…These in turn may be folded into tertiary structures of another distinct handedness. Equally, for finely layered chiral structures such as smectic or nematic (cholesteric) liquid crystals [19], or chiral sculptured thin films [20], the relative handedness of adjacent layers can be evinced in more than one sense [21], as schematically indicated in figure 2.…”

Section: Structure and Scalementioning

confidence: 99%

Quantum formulation for nanoscale optical and material chirality: symmetry issues, space and time parity, and observables

Andrews

2018

J. Opt.

View full text Add to dashboard Cite

To properly represent the interplay and coupling of optical and material chirality at the photonmolecule or photon-nanoparticle level invites a recognition of quantum facets in the fundamental aspects and mechanisms of light-matter interaction. It is therefore appropriate to cast theory in a general quantum form, one that is applicable to both linear and nonlinear optics as well as various forms of chiroptical interaction including chiral optomechanics. Such a framework, fully accounting for both radiation and matter in quantum terms, facilitates the scrutiny and identification of key issues concerning spatial and temporal parity, scale, dissipation and measurement. Furthermore it fully provides for describing the interactions of structured or twisted light beams with a vortex character, and it leads to the complete identification of symmetry conditions for materials to provide for chiral discrimination. Quantum considerations also lend a distinctive perspective to the very different senses in which other aspects of chirality are recognized in metamaterials. Duly attending to the symmetry principles governing allowed or disallowed forms of chiral discrimination supports an objective appraisal of the experimental possibilities and developing applications.

show abstract

“…Thus subsequent Figures will display a matrix that is not formally a Mueller matrix but is convenient for displaying the separate effects of transmission, retardance and diattenuation in simple forms. In this work we assume basic familiarity with the MHW textbook 44 and the basic thin film calculations by Abeles and Heavens matrices. 46 We will first show fringe predictions for a simple isotropic anti-reflection coating and make comparisons with traditional optical modeling tools.…”

Section: Dkist Opticsmentioning

confidence: 99%

Polarization modeling and predictions for DKIST part 2: application of the Berreman calculus to spectral polarization fringes of beamsplitters and crystal retarders

Harrington

Snik

Keller

et al. 2017

Polarization Science and Remote Sensing VIII

View full text Add to dashboard Cite

We outline polarization fringe predictions derived from a new application of the Berreman calculus for the Daniel K. Inouye Solar Telescope (DKIST) retarder optics. The DKIST retarder baseline design used 6 crystals, singlelayer anti-reflection coatings, thick cover windows and oil between all optical interfaces. This new tool estimates polarization fringes and optic Mueller matrices as functions of all optical design choices. The amplitude and period of polarized fringes under design changes, manufacturing errors, tolerances and several physical factors can now be estimated. This tool compares well with observations of fringes for data collected with the SPINOR spectropolarimeter at the Dunn Solar Telescope using bi-crystalline achromatic retarders as well as laboratory tests. With this new tool, we show impacts of design decisions on polarization fringes as impacted by antireflection coatings, oil refractive indices, cover window presence and part thicknesses. This tool helped DKIST decide to remove retarder cover windows and also recommends reconsideration of coating strategies for DKIST. We anticipate this tool to be essential in designing future retarders for mitigation of polarization and intensity fringe errors in other high spectral resolution astronomical systems.

show abstract

Birefringent Thin Films and Polarizing Elements

Cited by 40 publications

References 0 publications

Chiral Optical Tamm States: Temporal Coupled-Mode Theory

Chiral Optical Tamm States: Temporal Coupled-Mode Theory

Quantum formulation for nanoscale optical and material chirality: symmetry issues, space and time parity, and observables

Polarization modeling and predictions for DKIST part 2: application of the Berreman calculus to spectral polarization fringes of beamsplitters and crystal retarders

Contact Info

Product

Resources

About