Ultrafast all-optical modulator for 1.5 μm controlled by Ti:Al2O3 laser

Ermolenko, M. V.; Буганов, О. В.; Тихомиров, С. А.; Станкевич, В. В.; Гапоненко, С. В.; Shulenkov, A. S.

doi:10.1063/1.3475415

Cited by 11 publications

(4 citation statements)

References 13 publications

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“…As an additional advantage, MIM resonators can be easily engineered to work in the NIR-MIR range, being this the spectral region of interest of this paper. The spectral modulation performances of a device can be evaluated in terms of the differential transmissivity , where T ( t ) is the transmittance at a time t after the application of the modulation stimulus that, in our case, is a variation of the chemical potential, and T ( t 0 ) is the reference transmissivity at the starting point. ,− It is worth noticing that analogous figures of merit can be considered, associated to the other scattering parameters (i.e., differential reflectivity and absorbance), but for our purposes, detecting transmissivity is very convenient since it allows one to minimize the insertion loss and maximize the extinction ratio. Therefore, by considering a time-dependent modulation of the applied chemical potential, we can redefine the differential transmissivity as a function of the chemical potential rather than time as , where μ c 0 is the starting chemical potential and μ ci is the chemical potential at the i th instant.…”

Section: Resultsmentioning

confidence: 99%

Near- and Mid-Infrared Graphene-Based Photonic Architectures for Ultrafast and Low-Power Electro-Optical Switching and Ultra-High Resolution Imaging

Caligiuri

Pianelli

Miscuglio

et al. 2020

ACS Appl. Nano Mater.

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Confining near-infrared (NIR) and mid-infrared (MIR) radiation (1–10 μm) at the nanoscale is one of the main challenges in photonics. Thanks to the transparency of silicon in the NIR-MIR range, optoelectronic systems like electro-optical modulators have been broadly designed in this range. However, the trade-off between energy-per-bit consumption and speed still constitutes a significant bottleneck, preventing such a technology to express its full potentialities. Moreover, the harmless nature of NIR radiation makes it ideal for bio-photonic applications. In this work, we theoretically showcase a new kind of electro-optical modulators in the NIR-MIR range that optimize the trade-off between power consumption, switching speed, and light confinement, leveraging on the interplay between graphene and metamaterials. We investigate several configurations among which the one consisting in a SiO2/graphene hyperbolic metamaterial (HMM) outstands. The peculiar multilayered configuration of the HMM allowed one also to minimize the equivalent electrical capacitance to achieve attoJoule electro/optical modulation at about 500 MHz switching speed. This system manifests the so-called dielectric singularity, in correspondence to which an HMM lens with resolving power of λ/1660 has been designed, allowing to resolve 3 nm-wide objects placed at an interdistance of 3 nm and to overcome the diffraction limit by 3 orders of magnitude. The imaging possibilities opened by such technologies are evident especially in bio-photonic applications, where the investigation of biological entities with tailored/broadband-wavelength radiation and nanometer precision is necessary. Moreover, the modulation performances demonstrated by the graphene-based HMM configure it as a promise for ultrafast and low-power opto-electronics applications.

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Section: Resultsmentioning

confidence: 99%

Near- and Mid-Infrared Graphene-Based Photonic Architectures for Ultrafast and Low-Power Electro-Optical Switching and Ultra-High Resolution Imaging

Caligiuri

Pianelli

Miscuglio

et al. 2020

ACS Appl. Nano Mater.

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“…This resonance is highly sensitive to structural parameters such as size and shape, as well as to the refractive index changes of the surrounding environment [14,15]. Because of its unique optical properties, fano resonance can be applied to light modulators, all-optical switches, sensors and other fields, which is why it has obtained a lot of attentions [16,17]. Multiple Fano resonances are caused by the collective behaviors of the total plasmonic systems, so it is difficult to be obtained and controled independently [18].…”

Section: Introductionmentioning

confidence: 99%

Multiple adjustable Fano resonance based on double half ring resonator and its application

He¹,

Huo²,

Guo³

et al. 2021

Phys. Scr.

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In this paper, a compact nanostructure is proposed that includes a metal insulator metal (MIM) waveguide with a metal wall and a side-coupled half-ring resonator. The transmission characteristics of the system are studied numerically by using the finite element method (FEM). The simulation results show that double Fano resonances can be produced in the structure, and the two Fano resonances can be controlled independently by two different half rings. The position and intensity of the Fano resonance peaks can be adjusted flexibly and easily by changing the refractive index of the filling medium. The waveguide is sensitive to the refractive index of the filling medium inside the resonator and the maximum sensitivity and figure of merit (FOM) are 1260 nm/RIU and 26,000 respectively. By adding two more half-rings below, four independently adjustable Fano resonances are obtained. The structure of this paper can be used as a sensor which can detect the glucose concentration, so it has a broad application prospect in biomedical and chemical sensing fields.

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“…Generally, the effect of the switching in photonic crystals is usually based on the bandgap shift effect. Such all‐optical modulators and switchers utilize Kerr nonlinear response of solid materials, especially semiconductors, such as GaAs, zinc chalcogenides, InGaAsP, and doped metal oxides . The dynamics of charge carriers in the semiconductors provide picosecond response times of such switching systems.…”

Section: Introductionmentioning

confidence: 99%

All‐Optical Transmission Modulation Due to Inelastic Interactions of Ultrashort Pulses in a Disordered Resonant Medium

Novitsky

Shalin

2019

Annalen der Physik

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Random resonant media being one of the possible realizations of disordered metamaterials open a room of opportunities for achieving new fundamental effects and designing advanced nanophotonic devices. Strongly nonlinear optical properties of such media attract ever increasing attention nowadays from both theoretical and experimental points of view. Hereinafter, the case of the photonic-crystal-like structure with a randomly varying light-matter coupling provided by the random density of quantum particles is considered. Using numerical solution of the Maxwell-Bloch equations, the effects of the pulse collisions in the medium are studied. It is shown that disorder enables the qualitative changes of the system's response for co-propagating pulses, whereas this is not the case for the counter-propagating ones. The scheme for an all-optical transmission modulation due to the disorder-induced inelasticity of collisions of co-propagating pulses is proposed. The ability of precise tuning the modulation via the inter-pulse distance and background refractive index adjustment is revealed. This novel approach for light control can be utilized for some high demand applications, such as modulation and switching of a pulsed radiation.

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Ultrafast all-optical modulator for 1.5 μm controlled by Ti:Al2O3 laser

Cited by 11 publications

References 13 publications

Near- and Mid-Infrared Graphene-Based Photonic Architectures for Ultrafast and Low-Power Electro-Optical Switching and Ultra-High Resolution Imaging

Near- and Mid-Infrared Graphene-Based Photonic Architectures for Ultrafast and Low-Power Electro-Optical Switching and Ultra-High Resolution Imaging

Multiple adjustable Fano resonance based on double half ring resonator and its application

All‐Optical Transmission Modulation Due to Inelastic Interactions of Ultrashort Pulses in a Disordered Resonant Medium

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