Reconfigurable Optical Heptamer Disk Absorber Based on an Optical Switch

Zarrabi, Ferdows B.; Bazgir, Maryam; Hekmati, Reza

doi:10.1109/lpt.2019.2907651

Cited by 17 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This field has enabled the development of novel photonic devices at the nanoscale. Exciting applications include plasmonic waveguides for confining and routing light below the diffraction limit 2 , ultra-thin optical absorbers 3 , nanoantennas for enhancing light emission and detection 4 , optical switches controlled by external stimuli 3 , and logic gates for all-optical computing 5 . Many plasmonic structures can function as optical sensors by monitoring changes in the local refractive index, based on the high sensitivity of SPP resonances 6 .…”

Section: Introductionmentioning

confidence: 99%

Periodic stub implementation with plasmonic waveguide as a slow-wave coupled cavity for optical refractive index sensing

Tabatabaeian,

Kazemi,

Zarrabi

2024

Sci Rep

Self Cite

View full text Add to dashboard Cite

Optical biosensors based on plasmonic nanostructures have attracted great interest due to their ability to detect small refractive index changes with high sensitivity. In this work, a novel plasmonic coupled cavity waveguide is proposed for refractive index sensing applications. The structure consists of a metal–insulator–metal waveguide side coupled to an array of asymmetric H-shape element, designed to provide dual-band resonances. The sharp transmission dips and large field enhancements associated with dual-band resonances can enable sensitive detection of material under test. The resonator array creates a slow light effect to improve light-matter interactions. The structure was simulated using the finite integration technique as the full-wave technique, and the sensitivity and figure of merit were extracted for different ambient refractive indices. The maximum sensitivity of 1774 nm/RIU and high figure of merit of 2 × 104 RIU−1 for the basic model and 1.15 × 105 RIU−1 for the modified model were achieved, demonstrating the potential for high-performance sensing. The unique transmission characteristics also allow for combined spectral shaping and detection over a broad bandwidth. The simple, compact geometry makes the design suitable for on-chip integration. This work demonstrates a promising refractive index sensor based on coupled dual-band resonators in a plasmonic waveguide.

show abstract

Section: Introductionmentioning

confidence: 99%

Periodic stub implementation with plasmonic waveguide as a slow-wave coupled cavity for optical refractive index sensing

Tabatabaeian,

Kazemi,

Zarrabi

2024

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, these methods complicate the fabrication process and result in high costs. A reconfigurable absorber reported in reference [15] uses a combination of organic material in crystal form with gold disks. Here, the absorption frequency is reconfigured by selective switching of this organic material through biasing of gold disks.…”

Section: Introductionmentioning

confidence: 99%

Designing miniaturized metamaterial absorber with tunable multiband characteristics for THz applications

Ashvanth

Partibane²,

Idayachandran

2021

Bull Mater Sci

View full text Add to dashboard Cite

In this paper, a novel tunable metamaterial absorber having multiple bands is presented for solving sensing-related issues in THz applications. Initially, a zigzag shaped metamaterial absorber with multiband response is reported and then, a tunable absorber is proposed to cover a wide THz spectrum. The proposed tunable absorber has six 'V' shaped stubs with graphene at the edges to realize six absorption bands of 0.65, 1, 1.33, 1.45, 1.74 and 1.95 THz. The tuning of absorption bands is realized by varying the chemical potential of graphene by controlling the electrostatic gating and hence, provides tunable absorption characteristics in the optical regime. The absorber is designed with a polyimide substrate having a unit cell dimension of 0.14 9 0.14 ko, which is smaller when compared to similar literature. The simulation result shows a better absorption rate of [ 90% over most of the operating bands. The influence of material on the absorption peak is analysed by using different types of conductors and dielectric materials.

show abstract

“…In contrast to RF and microwave antennas, whose resonances occur when the size of the structure is on the order of a half‐wavelength in free space, the resonance in nano‐antennas is associated with plasmonic effects in the conducting parts of the antennas, especially at optical frequencies . In fact, the excitation of a nano‐antenna by an incident field induces the oscillations of free electrons in the conductors which in turn create surface plasmon polaritons (SPPs) …”

Section: Introductionmentioning

confidence: 99%

“…4 In fact, the excitation of a nano-antenna by an incident field induces the oscillations of free electrons in the conductors which in turn create surface plasmon polaritons (SPPs). [6][7][8][9][10] The concept of plasmonic resonance that occurs when an incident electromagnetic wave hits a metal surface inducing a SPPs has explained many physical phenomena giving arise to new applications in optical and IR ranges such as optical biosensors, absorbers, superlens, clocking, and energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

Parametric study of modified dipole nano‐antennas printed on thick substrates for infrared energy harvesting

Amara¹,

Oueslati

Eltresy

et al. 2019

Int J Numerical Modelling

View full text Add to dashboard Cite

Three efficient infrared-printed dipole nano-antennas are designed on a dielectric substrate for infrared energy harvesting. The three printed dipoles have different shapes, namely, rectangular, curved bowtie, and elliptical. These antennas are designed in to collect maximum electric field in the gap between the two poles in the frequency band of 28to 29THz, which is chosen because the received infrared power is maximum at 28.3 THz. A parametric study of the three proposed dipole shapes is performed to increase the localized electric field as well as modify to achieve resonance frequency at 28.3 THz. A parametric study is carried out to determine the dipole length, width, gap size, substrate thickness, and ground plane thickness. Next, the three dipoles are exposed to different polarizations incident plane waves in order to study the effect of the polarization of the incident wave on the electric field induced in the gap and to compare the performances of the three designs. The comparison study shows that at 28.3 THz, the curved bowtie dipole shape collects a larger electric field than the rectangular and elliptical shapesdo. K E Y W O R D Scurvature bowtie, electric field, elliptical dipole nano-antenna, infrared (IR), plane wave, rectangular dipole nano-antenna

show abstract

Reconfigurable Optical Heptamer Disk Absorber Based on an Optical Switch

Cited by 17 publications

References 21 publications

Periodic stub implementation with plasmonic waveguide as a slow-wave coupled cavity for optical refractive index sensing

Periodic stub implementation with plasmonic waveguide as a slow-wave coupled cavity for optical refractive index sensing

Designing miniaturized metamaterial absorber with tunable multiband characteristics for THz applications

Parametric study of modified dipole nano‐antennas printed on thick substrates for infrared energy harvesting

Contact Info

Product

Resources

About