Chiral mirror and optical resonator designs for circularly polarized light

Suppression of cross-polarized reflectances and transmittances

Ian J. Hodgkinson, Qi H. Wu, Matthew Arnold, Martin W. McCall, Akhlesh Lakhtakia

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

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-circularly-polarized) light to RCP (right-circularly-polarized). We show that the cross-polarized component of the reflected RCP beam can be eliminated by interference with an additional RCP beam that is reflected at the interface of an isotropic cover and an AR (antireflecting) layer. For best results the refractive index and thickness of the AR layer need to accommodate a phase change on reflection that occurs at the chiral film. Effective suppression of the reflectances RRR, RRL, RLR and the transmittances TRL, TLR can be achieved by sandwiching the chiral reflector between such amplitude and phase-matched AR coatings. Co-polarized chiral reflectors of this type may form efficient handed optical resonators. For LCP light the optical properties of such a handed resonator are formally the same as the properties of the isotropic passive or active Fabry-Perot resonators, but the handed resonator is transparent to RCP light.

Original languageEnglish (US)
Pages (from-to)201-211
Number of pages11
JournalOptics Communications
Volume210
Issue number3-6
DOIs
StatePublished - Sep 15 2002

Fingerprint

Optical resonators
optical resonators
Light polarization
polarized light
Resonators
transmittance
Mirrors
resonators
retarding
mirrors
reflectance
reflectors
handedness
Refractive index
Optical properties
refractivity
interference
coatings
optical properties
Thin films

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

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abstract = "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-circularly-polarized) light to RCP (right-circularly-polarized). We show that the cross-polarized component of the reflected RCP beam can be eliminated by interference with an additional RCP beam that is reflected at the interface of an isotropic cover and an AR (antireflecting) layer. For best results the refractive index and thickness of the AR layer need to accommodate a phase change on reflection that occurs at the chiral film. Effective suppression of the reflectances RRR, RRL, RLR and the transmittances TRL, TLR can be achieved by sandwiching the chiral reflector between such amplitude and phase-matched AR coatings. Co-polarized chiral reflectors of this type may form efficient handed optical resonators. For LCP light the optical properties of such a handed resonator are formally the same as the properties of the isotropic passive or active Fabry-Perot resonators, but the handed resonator is transparent to RCP light.",
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Chiral mirror and optical resonator designs for circularly polarized light : Suppression of cross-polarized reflectances and transmittances. / Hodgkinson, Ian J.; Wu, Qi H.; Arnold, Matthew; McCall, Martin W.; Lakhtakia, Akhlesh.

In: Optics Communications, Vol. 210, No. 3-6, 15.09.2002, p. 201-211.

Research output: Contribution to journalArticle

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