Achromatic and super-achromatic zero-order waveplates

Samoylov, A.V.; Samoylov, V.S.

doi:10.1109/lfnm.2003.1246095

Cited by 6 publications

(8 citation statements)

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“…These colors mean the LC helixes whose initial orientations are 0 • (blue) and 90 • (cyan), respectively, with respect to the x axis. Here, instead of discrete wavelength compensation with birefringent phase retarders [23], the same starting and ending polarization with wavelength-dependent, different polarization revolution processes are introduced to overcome the dispersion [24,25].…”

Section: Design and Principlementioning

confidence: 99%

Broadband Multichannel Optical Vortex Generators via Patterned Double-Layer Reverse-Twist Liquid Crystal Polymer

et al. 2020

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The capacity of an optical communication system can be greatly increased by using separate orbital angular momentum (OAM) modes as independent channels for signal transmission and encryption. At present, a transmissive OAM mode generator compatible with wavelength division multiplexing is being highly pursued. Here, we introduce a specific double-layer reverse-twist configuration into liquid crystal polymer (LCP) to overcome wavelength dependency. With this design, broadband-applicable OAM array generators are proposed and demonstrated. A Damman vortex grating and a Damman q-plate were encoded via photopatterning two subsequent LCP layers adopted with oppositely handed chiral dopants. Rectangular and hexagonal OAM arrays with mode conversion efficiencies exceeding 40.1% and 51.0% in the ranges of 530 to 930 nm, respectively, are presented. This provides a simple and broadband efficient strategy for beam shaping.

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Section: Design and Principlementioning

confidence: 99%

Broadband Multichannel Optical Vortex Generators via Patterned Double-Layer Reverse-Twist Liquid Crystal Polymer

et al. 2020

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“…Wave plates are fabricated from optically perfect polimer films (3MPP2500 TM polyester [7]), polyethelene tetraftalate [7], polymethylmethacrylate [8] and uniaxial crystals (e.g., quartz, MgF 2 , CdS). The operating spectral range for polymeric wave plates is 360-1400 nm [8,9].…”

Section: Phase (Wave) Platesmentioning

confidence: 99%

“…The operating spectral range for polymeric wave plates is 360-1400 nm [8,9]. The light energy density for the pulses of 10 ns duration must not exceed 300 mJ/cm 2 within the visible range, while for infrared range it must not exceed 500 mJ/cm 2 [10].…”

Section: Phase (Wave) Platesmentioning

confidence: 99%

Comparison of properties inherent to wave plates and Fresnel rhomb

Virko¹,

Lashkaryov²

2013

Semicond. Phys. Quantum Electron. Optoelectron.

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“…Representative prior achromatic retarder approaches. Some use homogenous plates with (a) different materials [4], and others use a single material in designs with (b) two [8] (DP), (c) three [9] (Pancharatnam), and (d) five [11] (APSAW) elements. Some others use two twisted liquid crystal (LC) elements, (e) with [16] and (f) without [19] an additional element, having six and four substrates with LC alignment layers, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…1(c)). The principle can be extended further [6,11,12], so that additional retarders ( Fig. 1(d)) allow for almost arbitrarily wide achromatic bandwidths in principle.…”

Section: Introductionmentioning

confidence: 99%

Multi-twist retarders: broadband retardation control using self-aligning reactive liquid crystal layers

Komanduri¹,

Lawler²,

Escuti³

2013

Opt. Express

135

100

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We report on a family of complex birefringent elements, called Multi-Twist Retarders (MTRs), which offer remarkably effective control of broadband polarization transformation. MTRs consist of two or more twisted liquid crystal (LC) layers on a single substrate and with a single alignment layer. Importantly, subsequent LC layers are aligned directly by prior layers, allowing simple fabrication, achieving automatic layer registration, and resulting in a monolithic film with a continuously varying optic axis. In this work, we employ a numerical design method and focus on achromatic quarter- and half-wave MTRs. In just two or three layers, these have bandwidths and general behavior that matches or exceeds all traditional approaches using multiple homogenous retarders. We validate the concept by fabricating several quarter-wave retarders using a commercial polymerizeable LC, and show excellent achromaticity across bandwidths of 450-650 nm and 400-800 nm. Due to their simple fabrication and many degrees of freedom, MTRs are especially well suited for patterned achromatic retarders, and can easily achieve large bandwidth and/or low-variation of retardation within visible through infrared wavelengths.

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Achromatic and super-achromatic zero-order waveplates

Cited by 6 publications

References 0 publications

Broadband Multichannel Optical Vortex Generators via Patterned Double-Layer Reverse-Twist Liquid Crystal Polymer

Broadband Multichannel Optical Vortex Generators via Patterned Double-Layer Reverse-Twist Liquid Crystal Polymer

Comparison of properties inherent to wave plates and Fresnel rhomb

Multi-twist retarders: broadband retardation control using self-aligning reactive liquid crystal layers

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