Spectral Stokesmeter 1 Implementation of the device

Тодоров, Т.; Nikolova, L.; Stoilov, Georgi; Hristov, Boian A.

doi:10.1364/ao.46.006662

Cited by 19 publications

(5 citation statements)

References 18 publications

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“…The polarization state of the incident beam is determined by four diffraction intensities (detected by D1, D2, D3, and D4) through the calculation of each Stokes parameter using a computer. Using the wavelength-dependence of the angular dispersion of diffraction angle, the system was expanded into spectral Stokesmeters [90]. Crossed gratings that include the two gratings for polarization determination have been fabricated in a photocontrollable LCP film [91].…”

Section: Applicationsmentioning

confidence: 99%

Optical and Physical Applications of Photocontrollable Materials: Azobenzene-Containing and Liquid Crystalline Polymers

2012

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Photocontrol of molecular alignment is an exceptionally-intelligent and useful strategy. It enables us to control optical coefficients, peripheral molecular alignments, surface relief structure, and actuation of substances by means of photoirradiation. Azobenzene-containing polymers and functionalized liquid crystalline polymers are well-known photocontrollable materials. In this paper, we introduce recent applications of these materials in the fields of mechanics, self-organized structuring, mass transport, optics, and photonics. The concepts in each application are explained based on the mechanisms of photocontrol. The interesting natures of the photocontrollable materials and the conceptual applications will stimulate novel ideas for future research and development in this field.

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Section: Applicationsmentioning

confidence: 99%

Optical and Physical Applications of Photocontrollable Materials: Azobenzene-Containing and Liquid Crystalline Polymers

2012

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“…Azobenzene-containing materials are often the preferred recording media for polarization holography due to their high values of photoinduced birefringence, allowing for the inscription of highly efficient polarizationselective holographic gratings. These gratings have specific polarization properties [54][55][56][57] that enable various applications in the fields of polarization-selective optical elements, high-capacity data storage, and many others [58][59][60][61][62]. A polarization diffraction grating is the key component in the design of a spectrophotopolarimeter, which can measure simultaneously in real time the spectra of all four Stokes parameters of light, as reported by Todorov and Nikolova [58,60].…”

Section: Introductionmentioning

confidence: 98%

“…These gratings have specific polarization properties [54][55][56][57] that enable various applications in the fields of polarization-selective optical elements, high-capacity data storage, and many others [58][59][60][61][62]. A polarization diffraction grating is the key component in the design of a spectrophotopolarimeter, which can measure simultaneously in real time the spectra of all four Stokes parameters of light, as reported by Todorov and Nikolova [58,60]. Provenzano et al reported the application of anisotropic gratings for circular dichroism measurements using a new configuration that is simpler than the conventional one [63].…”

Section: Introductionmentioning

confidence: 99%

Nanocomposite Photoanisotropic Materials for Applications in Polarization Holography and Photonics

Nazarova,

Nedelchev,

Berberova-Buhova

et al. 2023

Nanomaterials

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Photoanisotropic materials, in particular azodyes and azopolymers, have attracted significant research interest in the last decades. This is due to their applications in polarization holography and 4G optics, enabling polarization-selective diffractive optical elements with unique properties, including circular polarization beam-splitters, polarization-selective bifocal lenses, and many others. Numerous methods have been applied to increase the photoinduced birefringence of these materials, and as a result, to obtain polarization holographic elements with a high diffraction efficiency. Recently, a new approach has emerged that has been extensively studied by many research groups, namely doping azobenzene-containing materials with nanoparticles with various compositions, sizes, and morphologies. The resulting nanocomposites have shown significant enhancement in their photoanisotropic response, including increased photoinduced birefringence, leading to a higher diffraction efficiency and a larger surface relief modulation in the case of polarization holographic recordings. This review aims to cover the most important achievements in this new but fast-growing field of research and to present an extensive comparative analysis of the result, reported by many research groups during the last two decades. Different hypotheses to explain the mechanism of photoanisotropy enhancement in these nanocomposites are also discussed. Finally, we present our vision for the future development of this scientific field and outline its potential applications in advanced photonics technologies.

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“…Polarization holography using polarization-sensitive materials is one of the principal strategy for fabricating polarization gratings [1]. Advanced applications that use the diffraction characteristics have been proposed such as image holograms [2][3][4][5][6], logic operations [7], photopolarimeters [8][9][10][11][12][13][14], diffractive waveplates [15], and beam controller [16]. Nersisyan and coworkers reported the potentials of optical axis gratings as a subclass of polarization gratings for optical switching applications, intensively and extensively [17].…”

Section: Introductionmentioning

confidence: 99%

Formation of positive and negative anisotropic holographic gratings depending on recording energy in photoreactive liquid crystalline copolymer films

et al. 2012

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Anisotropic diffractive gratings formed by birefringent molecular alignment are fabricated by a holographic technique using a photo-cross-linkable liquid crystalline copolymer (PLCCP). Depending on the exposure energy used for holographic recording, bright or dark regions of the interference fringe can be chosen for the molecularaligned region, analogous to positive-and negative-type photoresist processing in photolithography. In conjunction with simultaneously generated surface relief gratings, the anisotropic refractive index modulation inherent in the PLCCP film exhibits different diffraction properties depending on the incident beam polarization. The anisotropic refractive index grating profiles are quantitatively presented for two cases determined by the exposure energy, based on the Fourier analysis of diffractive optics. The selection of different grating formations selected by varying only the ex-A. Emoto ( ) posure energy could provide a strategy for the fabrication of functionalized diffractive optical elements.

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Spectral Stokesmeter 1 Implementation of the device

Cited by 19 publications

References 18 publications

Optical and Physical Applications of Photocontrollable Materials: Azobenzene-Containing and Liquid Crystalline Polymers

Optical and Physical Applications of Photocontrollable Materials: Azobenzene-Containing and Liquid Crystalline Polymers

Nanocomposite Photoanisotropic Materials for Applications in Polarization Holography and Photonics

Formation of positive and negative anisotropic holographic gratings depending on recording energy in photoreactive liquid crystalline copolymer films

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