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Highly Flexible and Voltage Based Wavelength Tunable Biosensor
Author(s) -
Muhammad Naseer,
Liu Qiang,
Tang Xiaopin,
Fu Tao,
Daud Khan Adnan,
Ouyang Zhengbiao
Publication year - 2019
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201800633
Subject(s) - materials science , refractive index , absorption (acoustics) , optoelectronics , wavelength , optics , voltage , plasmon , raman spectroscopy , multispectral image , fabrication , infrared , physics , computer science , medicine , alternative medicine , pathology , quantum mechanics , composite material , computer vision
A plasmonic absorber as a biosensor based on the highly flexible electro‐optic material is numerically investigated. The structure demonstrates multispectral high absorption in visible and unity absorption in the near‐infrared range. The resonant wavelengths are extremely sensitive to the applied voltage, variation in geometric parameters, and the refractive index of the background material, resulting in wavelength‐tunable absorption that can be used for tunable sensors and filters. The refractive index based sensitivity is calculated on different voltages to adjust the resonances to the desired point in a wide waveband for detecting a large number of different biomaterials. The electro‐optic tunability can be used to reduce fabrication errors and use of scaling. In addition, strong field absorption, broad resonant peaks, and wide incident angle absorption versatility are found in the proposed structure which can be applied for energy harvesting, infra‐red detection, and surface‐enhanced Raman spectroscopy purposes.