Vanadium dioxide as a material to control light polarization in the visible and near infrared

Cormier, Patrick; Son, Tran Vinh; Thibodeau, Jacques; Doucet, Alexandre; Truong, Vo‐Van; Haché, Alain

doi:10.1016/j.optcom.2016.07.070

Cited by 37 publications

(21 citation statements)

References 16 publications

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“…By increasing heat, the metallic portion of VO 2 increases and becomes fully metallic above 68˚C. The temperature-dependent refractive index at telecommunication wavelength is extracted from reference [37]. Consequently, the coupling and extinction ratio versus temperature is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Thermally Controllable High-Efficiency Unidirectional Coupling in a Double-Slit Structure Filled With Phase Change Material

Afshari-Bavil

Dong

et al. 2019

IEEE Photonics J.

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We present the realization of a high-efficiency, compact, and thermally tunable unidirectional launcher of surface plasmon polaritons (SPPs) in a double-slit structure filled with phase change materials (PCMs). PCMs such as VO 2 provide a feasible way for tailoring optical properties, particularly refractive index as a function of heat. By introducing a narrow hybrid dielectric layer beneath the slits, SPPs couple efficiently into waveguide mode and propagate within the slot waveguide with considerably high intensity. Our simulation results revealed up to 80% coupling efficiency into the slot waveguide with extinction ratio of 1:800 between the left and the right slots can be achieved at telecommunication wavelength for normally incident P-polarized light. By heating the coupler above the VO 2 phase transition temperature, the coupling and consequently the crosstalk approaches zero. Propagation length and other properties of the structure are characterized to confirm the feasibility of the coupler. This approach of unidirectional coupling into slot waveguides may lead to the development of integrated plasmonic circuits and on-chip applications.

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Section: Resultsmentioning

confidence: 99%

Thermally Controllable High-Efficiency Unidirectional Coupling in a Double-Slit Structure Filled With Phase Change Material

Afshari-Bavil

Dong

et al. 2019

IEEE Photonics J.

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“…VO2 is another PCM which can be considered. VO2 transitions from a low temperature semiconducting monoclinic phase to a high temperature rutile metallic phase at 68 o C [23], significantly lower than the 170 o C and 145 o C required for AIST [3] and GST [10], respectively. This phase transition can be achieved by heating [5] or it can be electrically triggered [8] with lower power consumption than for AIST or GST.…”

Section: Introductionmentioning

confidence: 88%

Dynamic structural colour using vanadium dioxide thin films

Wilson¹,

Marocico²,

Bradley³

2018

J. Phys. D: Appl. Phys.

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A thin film stack consisting of layers of Indium Tin Oxide (ITO) with an intermediate Vanadium Oxide (VO2) layer on an optically thick silver film has been investigated for dynamic structural colour. The structure benefits from the phase change properties of VO2. Compared with other phase change materials, such as Germanium Antimony Telluride (GST), VO2 can be offered as a lower power consumption alternative. It has been overlooked in the visible spectral range due to its smaller refractive index change below 700 nm. We demonstrate that the sensitivity of the visible reflectance spectrum to the change in phase of a 30 nm VO2 layer is increased after it is incorporated in a thin film stack, with performance comparable to other phase change materials. The extent to which dynamic tuning of the reflectance spectra of ITO-VO2-ITO-Ag thin film stacks can be exploited for colour switching is reported, with approximately 25% change in reflectance demonstrated at 550 nm. Inclusion of a top ITO layer is also shown to improve the chromaticity change on phase transition.

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“…During the transition, the electrical resistivity has dramatic changes and can vary up to four orders of magnitude across the two phases [24]. Due to an ultrafast switching time, near room critical temperature and beneficial structural transition characteristics, VO2 has identified as considerable material in reconfigurable metamaterial devices over a broad spectral range from GHz [25] to optics [26] and has numerous functional applications at terahertz frequency region suchlike reconfigurable digital metasurface [27], polarization converter [28], reflection/transmission THz waves modulator [29] and tunable antennas [30]. Nowadays, with the rapid development of modern high data rate THz wireless communication, current applications in terahertz region are in dire need of high speed/quality communication and large data storage capacity [31].…”

Section: Introductionmentioning

confidence: 99%

Programmable anisotropic digital metasurface for independent manipulation of dual-polarized THz waves based on a voltage-controlled phase transition of VO₂microwires

Shabanpour

2020

J. Mater. Chem. C

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Programmable metasurfaces incorporated with tunable materials controlled by external stimuli can provide an unprecedented degree of freedom in dynamical wave manipulation in real-time.Beyond the scope of isotropic reconfigurable metasurfaces that only support unique tunable responses for excitation with a certain single-polarization, here, for the first time a new generation of ultrafast reprogrammable multi-functional anisotropic metasurface is reported to enable interchangeable missions independently for two orthogonal linearly polarized THz wavefront excitations. The reconfigurability of the proposed anisotropic meta-device was guaranteed by elaborately designed meta-particle composed of two perpendicular VO2 microwires whose operational statuses can be arbitrarily and dynamically tuned among two digital states of "0" and "1" independent for dual-polarization channels by mere changing the biasing voltage via two independent computer-programmed multichannel DC network. Capitalizing on such meta-particle design, single/multiple focused THz beam into a pre-determined focal spot and single/multiple focused vortex beams with interchangeable OAM modes satisfactorily generated by encoding a metasurface with different parabola and spiral-parabola-like coding sequences respectively.Besides controlling the near field behaviors, the versatility and flexibility of the proposed anisotropic metasurface also can furnish an inspiring platform to manipulate the far-field scattering patterns in each desired polarization channel. Consequently, two/four arbitrary oriented pencil beams, twin vortex beams with opposite OAM modes and random diffusion of terahertz wave are also realized by the proposed structure. Anisotropic meta-device bringing new degrees of freedom in achieving versatile tunable control of differently polarized electromagnetic waves which will significantly enhance storage density and data capacities and has the potential for complicated wave manipulation such as ultrafast THz communication and dynamic holography.

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Vanadium dioxide as a material to control light polarization in the visible and near infrared

Cited by 37 publications

References 16 publications

Thermally Controllable High-Efficiency Unidirectional Coupling in a Double-Slit Structure Filled With Phase Change Material

Thermally Controllable High-Efficiency Unidirectional Coupling in a Double-Slit Structure Filled With Phase Change Material

Dynamic structural colour using vanadium dioxide thin films

Programmable anisotropic digital metasurface for independent manipulation of dual-polarized THz waves based on a voltage-controlled phase transition of VO₂microwires

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Vanadium dioxide as a material to control light polarization in the visible and near infrared

Cited by 37 publications

References 16 publications

Thermally Controllable High-Efficiency Unidirectional Coupling in a Double-Slit Structure Filled With Phase Change Material

Thermally Controllable High-Efficiency Unidirectional Coupling in a Double-Slit Structure Filled With Phase Change Material

Dynamic structural colour using vanadium dioxide thin films

Programmable anisotropic digital metasurface for independent manipulation of dual-polarized THz waves based on a voltage-controlled phase transition of VO2microwires

Contact Info

Product

Resources

About

Programmable anisotropic digital metasurface for independent manipulation of dual-polarized THz waves based on a voltage-controlled phase transition of VO₂microwires