Liquid Crystal Devices for the Reconfigurable Generation of Optical Vortices

Albero, Jorge; García‐Martínez, Pascuala; Bennis, N.; Otón, Eva; Cerrolaza, B.; Moreno, Ignacio; Davis, Jeffrey A.

doi:10.1109/jlt.2012.2211567

Cited by 35 publications

(22 citation statements)

References 23 publications

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“…In recent years, a number of different methods and systems have been developed to create such 2D polarization patterns, including interferometric systems [10], specially designed subwavelength structures [11], radially patterned polarizers [12], liquid crystal devices with specially designed shaped electrodes [13,14], and inhomogeneous birefringent elements named q-plates [15]. For simplicity, we will concentrate here on those techniques that utilize SLMs [16][17][18][19][20][21][22][23][24][25][26][27][28], since they allow the greatest freedom.…”

Section: Introductionmentioning

confidence: 99%

Encoding high-order cylindrically polarized light beams

et al. 2014

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In this work we present a setup for the experimental production of cylindrically polarized beams, as well as other variations of polarized light beams. The optical system uses a single transmissive phase-only spatial light modulator, which is used to apply different spatial phase modulation to two output collinear R and L circularly polarized components. Different cylindrically polarized light beams can be obtained by applying different phase shifts to these two circularly polarized components. The system is very efficient since modulation is directly applied to the light beam (as opposed to other common methods operating in the first order of encoded diffraction gratings). Different variations to the cylindrically polarized light beams are also reported, obtained by adding linear or quadratic relative phase shifts between the two circular polarization components of the light beam. Experimental results are provided in all cases.

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Section: Introductionmentioning

confidence: 99%

Encoding high-order cylindrically polarized light beams

et al. 2014

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“…Here A e=o ¼ a 2 e=o is the absorbance, and T e=o ¼ jt e=o j 2 is the FP normalized transmittance in the E and O axis, as defined in Eq. (5). Note that Eq.…”

Section: Jones Matrix Modelmentioning

confidence: 99%

“…1 Such a simple system, when illuminated with a continuous broadband light source, presents a spectral transmission with sinusoidal oscillations, since the spectral retardance / k ð Þ is approximately proportional to k À1 . This oscillating spectrum can be employed to characterize the / k ð Þ function of wave-plates with fixed retardation, [2][3][4] as well as of liquid crystal retarders, 5,6 and related tunable wavelength filters. 7 However, multireflection Fabry-Perot (FP) interference effects in wave-plates might become relevant.…”

Section: Introductionmentioning

confidence: 99%

Highly accurate spectral retardance characterization of a liquid crystal retarder including Fabry-Perot interference effects

Vargas

Sánchez-López

García‐Martínez

et al. 2014

Journal of Applied Physics

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Multiple-beam Fabry-Perot (FP) interferences occur in liquid crystal retarders (LCR) devoid of an antireflective coating. In this work, a highly accurate method to obtain the spectral retardance of such devices is presented. On the basis of a simple model of the LCR that includes FP effects and by using a voltage transfer function, we show how the FP features in the transmission spectrum can be used to accurately retrieve the ordinary and extraordinary spectral phase delays, and the voltage dependence of the latter. As a consequence, the modulation characteristics of the device are fully determined with high accuracy by means of a few off-state physical parameters which are wavelength-dependent, and a single voltage transfer function that is valid within the spectral range of characterization.

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“…Исследования последнего десятилетия привели к созданию новых устройств модального типа, таких как двумерные матрицы управляемых микроаксиконов, параметрами которых можно управлять за счет прикладываемых напряжений [3][4][5], ЖК спиральные фазовые пластинки для реализации оптических вихрей с высокой энергетической эффективностью [6,7] и других.…”

Section: Introductionunclassified

Возможность Формирования Двухлепестковых Вихревых Световых Полей С Помощью Модифицированного ЖК Фокусатора-=sup=-*-=/Sup=-

Котова¹,

Майорова²,

Самагин³

2019

Журнал Технической Физики

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Поступила в редакцию 24.09.2018 г.Проанализированы возможности формирования световых полей с распределением интенсивности в виде двух максимумов, вращающихся в процессе распространения, с помощью жидкокристаллического модального устройства. Оцениваются скорости поворота распределения интенсивности в зависимости от радиуса кривизны падающей на модулятор волны, а также энергетическая эффективность сформированных полей.Рис. 3. Распределения интенсивности светового поля, формируемого ЖК фокусатором в плоскости наблюдения в зависимости от ее положения. Расстояние от ЖК фокусатора до плоскости наблюдения 20 (а), 22 (b), 24 (c), 26 (d) и 28 сm (е).Оптика и спектроскопия, 2019, том 126, вып. 1

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Liquid Crystal Devices for the Reconfigurable Generation of Optical Vortices

Cited by 35 publications

References 23 publications

Encoding high-order cylindrically polarized light beams

Encoding high-order cylindrically polarized light beams

Highly accurate spectral retardance characterization of a liquid crystal retarder including Fabry-Perot interference effects

Возможность Формирования Двухлепестковых Вихревых Световых Полей С Помощью Модифицированного ЖК Фокусатора-=sup=-*-=/Sup=-

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