An Ultrahigh Narrowband Absorber Close to the Information Communication Window

Ali, Wajid; Iqbal, Shahid; Ullah, Muhib; Wang, Xiaoli

doi:10.1007/s11468-021-01557-9

Cited by 5 publications

(2 citation statements)

References 29 publications

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“…Figure 1b presents the absorption (A), reflection (R), and transmission (T) spectra of the symmetric plasmonic nanostructure. It shows a near-perfect absorption for the plasmonic resonant peak at 1537 nm, which is in good agreement with similar studies [35]. The observed spectral position is located in the communication window of information, which is favorably suited for switching and optical modulation applications.…”

Section: Resultssupporting

confidence: 91%

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Near-Infrared Perfect Absorption and Refractive Index Sensing Enabled by Split Ring Nanostructures

Ali,

Liu,

Liu

et al. 2023

Nanomaterials

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Plasmonic nanostructures as narrowband perfect absorbers have garnered significant attention due to their potential applications in biosensing and environment detection. This study emphasizes the investigation of arrayed split ring nanostructures within the configuration of metal-insulator-metal (MIM) multilayers, resulting in a maximum light absorption of 99.94% in the near-infrared (NIR) spectral range. The exceptional absorption efficiency of the device is attributed to the strong resonance of electric and magnetic fields arising from the Fabry–Pérot cavity resonance. The resonant peak can be flexibly tuned by engineering the dielectric layer thickness, the period, and the geometric parameter of split rings. Remarkably, the device exhibits promising capabilities in sensing, demonstrating a sensitivity of 326 nm/RIU in visible wavelengths and 504 nm/RIU in NIR wavelengths when exposed to bio-analytes with varying refractive indices. This designed nanostructure can serve as a promising candidate for biosensors or environmental detection.

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Section: Resultssupporting

confidence: 91%

“…The split ring nanostructure has a common cut width of 50 nm. In contrast to unbroken resonators [35], our designed plasmonic nanostructure in Figure 1c offers two unique features resulting from its symmetry breaking. Firstly, it enables dual narrowband absorption, significantly expanding the device's absorption capabilities.…”

Section: Resultsmentioning

confidence: 99%