Pure optical phase control with vanadium dioxide thin films

Son, Tran Vinh; Zongo, K.; Ba, C.; Beydaghyan, Gisia; Haché, Alain

doi:10.1016/j.optcom.2014.01.037

Cited by 28 publications

(7 citation statements)

References 20 publications

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“…Closely related, VO 2 nanocrystals (NCs) in their high-temperature phase feature near-infrared plasmonic resonances with properties depending on their size, shape and the host matrix material. VO 2 based structures in general are envisioned for applications such as switchable optical elements [2,3] and the optical control of the phase of light [4]. More recent work incorporates VO 2 into hybrid structures involving, e.g., photonic crystals and waveguides [5,6].…”

Section: Introductionmentioning

confidence: 99%

Near-infrared saturable and reverse saturable absorption of ion beam synthesized VO₂ nanocrystals

Mundry¹,

Krenner²,

Karl³

et al. 2020

Opt. Mater. Express

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We investigate the nonlinear optical response of a thin film of ion-implanted VO 2 nanocrystals with open aperture z-scans involving femtosecond near-infrared pulses. Beyond the established nonlinearity related to the insulator-metal phase transition of VO 2 , the metallic state features a pronounced saturable absorption for 100 fs pulses from a modelocked Yb:fiber source at λ = 1036 nm. In contrast, we find a pronounced reverse saturable absorption for 90 fs pulses in the telecom window at λ = 1550 nm. We attribute these nonlinearities to a transient red-shift of the plasmonic resonance of the nanocrystals, in line with the temperature dependence of the linear absorption and the theoretical expectation for electronic heating. Details of the transmissivity characteristics can be tailored by the lattice temperature and/or the size of the nanocrystals. The results hold promise for the use of VO 2 nanocrystals as a saturable absorber, e.g., to mode-locked near-infrared lasers.

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Section: Introductionmentioning

confidence: 99%

Near-infrared saturable and reverse saturable absorption of ion beam synthesized VO₂ nanocrystals

Mundry¹,

Krenner²,

Karl³

et al. 2020

Opt. Mater. Express

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show abstract

“…Changes in optical properties have been useful mostly for applications of spectral filtering and fieldamplitude modulation of infrared light, but recently, applications have also been found for phase and polarization modulation of visible and infrared light [6][7][8][9][10]. Phase and polarization modulations rely on the principle that in a material with complex-valued refractive indices like VO 2 , optical phase shifts are generally unequal in s-and p-polarizations.…”

Section: Introductionmentioning

confidence: 99%

Polarization modulation by vanadium dioxide on metallic substrates

Son

Anh

Truong

et al. 2018

Optics Communications

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Vanadium dioxide (VO 2 ) undergoing phase transition is known alters the polarization state of light in reflection owing to large changes in complex refractive indices. While this effect is promising for optical modulation applications, the usual VO 2 films on dielectric substrates tend to offer limited tunability for polarization modulation. In this paper, we show that metallic under-layers greatly enhance the performance by widening the spectral range and include visible wavelengths, by increasing the polarization modulation amplitude, and by widening the range of workable incidence angles. The imaginary part of the refractive index in the metallic layer is found to increase the relative phase shifts between s-and p-components of polarization as well as increasing the reflectance.

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“…Although the material properties of VO 2 have been studied extensively, argu-ment on the exact mechanism behind phase transition still exists. Various applications utilizing its optically induced refractive index modulation (Δn) have been reported, such as tunable resonators [4], filters and modulators [11,12], optical phase controllers [13], switches, and photodetectors [14]. However, a major drawback of VO 2 is the relatively long recovery time of the transition back from the metal state to the dielectric state, which is usually longer than 10 ns.…”

mentioning

confidence: 99%

All-optical short pulse translation through cross-phase modulation in a VO_2 thin film

et al. 2016

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VO2 is a promising material for reconfigurable photonic devices due to the ultrafast changes in electronic and optical properties associated with its dielectric-to-metal phase transition. Based on a fiber-optic, pump-probe setup at 1550 nm wavelength window, and by varying the pump-pulse duration, we show that the material phase transition is primarily caused by the pump-pulse energy. For the first time, we demonstrate that the instantaneous optical phase modulation of probe during pump leading edge can be utilized to create short optical pulses at probe wavelength, through optical frequency discrimination. This circumvents the impact of long recovery time well known for the phase transition of VO2.

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Pure optical phase control with vanadium dioxide thin films

Cited by 28 publications

References 20 publications

Near-infrared saturable and reverse saturable absorption of ion beam synthesized VO₂ nanocrystals

Near-infrared saturable and reverse saturable absorption of ion beam synthesized VO₂ nanocrystals

Polarization modulation by vanadium dioxide on metallic substrates

All-optical short pulse translation through cross-phase modulation in a VO_2 thin film

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Pure optical phase control with vanadium dioxide thin films

Cited by 28 publications

References 20 publications

Near-infrared saturable and reverse saturable absorption of ion beam synthesized VO2 nanocrystals

Near-infrared saturable and reverse saturable absorption of ion beam synthesized VO2 nanocrystals

Polarization modulation by vanadium dioxide on metallic substrates

All-optical short pulse translation through cross-phase modulation in a VO_2 thin film

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Product

Resources

About

Near-infrared saturable and reverse saturable absorption of ion beam synthesized VO₂ nanocrystals

Near-infrared saturable and reverse saturable absorption of ion beam synthesized VO₂ nanocrystals