Control of EOT on sub-wavelength Au hole arrays via Fano resonances

Şahin, Ramazan

doi:10.1016/j.optcom.2019.124431

Cited by 6 publications

(4 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, we utilize an analytical model based on two coupled harmonic oscillators [18,29,30], describing the dynamics of propagating and localized plasmon modes induced in the EOT device. We investigate the time-dependent spatial and temporal dynamics of coupled plasmon modes and estimate the optical response of the system acting as a plasmon-induced EOT system.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…In the numerical simulations, we calculate the electric-field flux in the near-and far-field regimes using the FDTD method, which provides the time-dependent solutions of 3D Maxwell's equations and evaluates the power density spectra through the Poynting vector [18]. The frequency and time-domain spectra are obtained via standard Fourier transform of the timedependent field passing through the plane of the EOT structure.…”

Section: Computational Modelmentioning

confidence: 99%

“…The spatiotemporal dynamics of plasmon modes, including the nanoscale intense near field [15] and ultrafast damped oscillations [16], can be controlled through external stimuli, such as quantum objects and optical light sources. For instance, placing a quantum emitter inside the nanohole structure and its coupling with LSP resonances has demonstrated the spectral and spatial modulation of transmitted light and enables low dissipation of the signal during the evolution of the system [17,18].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

All-optical control of ultrafast plasmon resonances in the pulse-driven extraordinary optical transmission

Asif¹,

Tașgın²,

Şahin³

2023

J. Opt.

Self Cite

View full text Add to dashboard Cite

Understanding the ultrafast processes at their natural-time scale is crucial for controlling and manipulating nanoscale optoelectronic devices under light-matter interaction. Here, we demonstrate that ultrafast plasmon resonances, attributed to the phenomenon of Extraordinary Optical Transmission (EOT), can be significantly modified by tuning the spectral and temporal properties of the ultrashort light pulse. In this scheme, all-optical active tuning governs spatial and temporal enhancement of plasmon oscillations in the EOT system without device customization. We analyze the spectral and temporal evolution of the system through two approaches. First, we develop a theoretical framework based on the coupled harmonic oscillator model, which analytically describes the dynamics of plasmon modes in the coupled and uncoupled state. Later, we compare the evolution of the system under continuous wave and pulsed illumination. Further, we discuss time-resolved spectral and spatial dynamics of plasmon modes through 3D-FDTD simulation method and wavelet transform. Our results show that optical tuning of oscillation time, intensity, and spectral properties of propagating and localized plasmon modes yields a 3-fold enhancement in the EOT signal. The active tuning of the EOT sensor through ultrashort light pulses pave the way for the development of on-chip photonic devices employing high-resolution imaging and sensing of abundant atomic and molecular systems.

show abstract

Section: Theoretical Modelmentioning

confidence: 99%

Section: Computational Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

All-optical control of ultrafast plasmon resonances in the pulse-driven extraordinary optical transmission

Asif¹,

Tașgın²,

Şahin³

2023

J. Opt.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Fano resonance is analogous to Electromagnetic Induced Transparency (EIT) except for the external driving source [20,21]. Fano resonance [6,22] paves the way for controlling both linear [23][24][25][26] and non-linear [27][28][29][30] plasmonic processes [31] in many applications. Besides, it can be acquired by the coupling of dark plasmon modes or quantum objects (quantum emitter (QE), quantum dot (QD) or molecule, etc.)…”

Section: Introductionmentioning

confidence: 99%

Silent-enhancement of multiple Raman modes via tuning optical properties of graphene nanostructures

Gencaslan,

Aytas,

Asif

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

Raman scattering signal can be enhanced through localization of incident field into sub-wavelength hot-spots through plasmonic nanostructures (Surface-enhanced Raman scattering-SERS). Recently, further enhancement of SERS signal via quantum objects are proposed by [1] without increasing the hot-spot intensity (silent-enhancement) where this suggestion prevents the modification of vibrational modes or the breakdown of molecules. The method utilizes path interference in the non-linear response of Stokes-shifted Raman modes. In this work, we extend this phenomenon to tune the spectral position of silent-enhancement factor where the multiple vibrational modes can be detected with a better signal-to-noise ratio, simultaneously. This can be achieved in two different schemes by employing either (i) graphene structures with quantum emitters or (ii) replacing quantum emitters with graphene spherical nano-shell in [1]. In addition, the latter system is exactly solvable in the steady-state. These suggestions not only preserve conventional non-linear Raman processes but also provide flexibility to enhance (silently) multiple vibrational Raman modes due to the tunable optical properties of graphene.

show abstract

Metastructure-inspired ultraviolet and blue light filter

et al. 2020

View full text Add to dashboard Cite

Currently, many studies are being conducted to apply optical metamaterials to the transmittance control of visible light and near infrared wavelengths. In this study, a metastructure was fabricated with periodic metal holes that can reduce the transmittance of only ultraviolet (UV) and blue light in the wavelength band from UV to visible light. The connection structure of the metal-hole-patterns, with a hole size of tens to hundreds of μm, and the crystallinity of the metal could be controlled through the three-step process of polystyrene (PS) nanosphere array formation, using the air–water interface method, and size adjustment of the PS nanosphere, through the etching process, and through the adjustment of the metal film thickness. The glass substrate, with an Al-hole-patterned metastructure (an Al-hole-pattern size of ∼245 nm and an Al thickness of ∼60 nm), showed a low transmittance of 33% and 28% in the wavelength bands of 350 nm and 470 nm, respectively, and a high transmittance of 67% and 57% in the ranges of 540 nm and 670 nm, respectively, owing to the metacharacteristics manifested in periodically connected metal patterning structures. This Al-hole-patterned metastructure is expected to be applicable to various optical devices that require a reduction in the transmittance of only the UV and blue light wavelength band.

show abstract

Control of EOT on sub-wavelength Au hole arrays via Fano resonances

Cited by 6 publications

References 32 publications

All-optical control of ultrafast plasmon resonances in the pulse-driven extraordinary optical transmission

All-optical control of ultrafast plasmon resonances in the pulse-driven extraordinary optical transmission

Silent-enhancement of multiple Raman modes via tuning optical properties of graphene nanostructures

Metastructure-inspired ultraviolet and blue light filter

Contact Info

Product

Resources

About