Highly sensitive biochemical sensor based on nanostructured plasmonic interferometer

Khajemiri, Z.; Hamidi, Seyedeh Mehri; Suwal, O. K.

doi:10.1016/j.optcom.2018.06.032

Cited by 12 publications

(4 citation statements)

References 32 publications

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“…Employing the linear fits to the experimental data, the sensitivities for interferometer with L = 850 nm were obtained as 4923 (nm/RIU) and 2065 (nm/RIU) respectively at 729 nm and 605 nm which is in agreement with the observed simulation in the present study. These results are consistently greater than the reported values in the recent nanoplasmonic studies 9,11,13,19–25 in this visible spectral region and other reported plasmonic interferometers 5,30–32,39–41 .…”

Section: Resultscontrasting

confidence: 44%

“…As a function of the incident electrical fields, E Light , SPP field, E spp , an efective refractive index of SPP, n spp and an initial phase shift, φ 0 32,34 . The proposed sensing scheme is based on spectral shift of the recorded pattern in broadband illuminations by changing refractive index.…”

Section: Resultsmentioning

confidence: 99%

“…They showed that the design of their plasmonic interferometer allow a high flexibility in controlling the amplitude and phase of interfering SPPs as well as a narrow linewidth via the advantage of small size structure, however, the relatively low sensitivity (441.2 RIU/nm) limits its widespread application. Further, a recent work in the authors’ laboratory showed a high FOM in a small scale rectangular grooves-based plasmonic interferometer as compared with the aforementioned literatures, however, this structure also suffers from low sensitivity (500 nm/RIU) 32 . In this context, it is worthwhile to detect improved plasmonic interferometers that further enhance the sensitivity.…”

Section: Introductionmentioning

confidence: 81%

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Rectangular plasmonic interferometer for high sensitive glycerol sensor

Khajemiri

Lee

Hamidi

et al. 2019

Sci Rep

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A novel plasmonic interferometric sensor intended for application to biochemical sensing has been investigated experimentally and theoretically. The sensor was included a slit surrounded by rectangular grooves using a thick gold film. A three-dimensional finite difference time-domain commercial software package was applied to simulate the structure. The Focused ion beam milling has been used as a mean to fabricate series of rectangular plasmonic interferometer with varying slit-groove distance L. Oscillation behavior is shown by transmission spectra in a broadband wavelength range between 400 nm and 800 nm in the distance between slit and grooves. Red-shifted interference spectrum is the result of increasing refractive indices. The proposed structure is functional from visible to near-infrared wavelength range and yields a sensitivity of 4923 nm/RIU and a figure of merit as high as 214 at 729 nm wavelength. In conclusion, this study indicates the possibility of fabricating a low cost, compact, and real-time high-throughput plasmonic interferometer.

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Section: Resultscontrasting

confidence: 44%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 81%

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Rectangular plasmonic interferometer for high sensitive glycerol sensor

Khajemiri

Lee

Hamidi

et al. 2019

Sci Rep

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“…Recently, a new direction, plasmonic interferometry, − has started to actively develop. The plasma wave velocity in 2D materials is normally an order of magnitude larger than the electron drift velocity and is much smaller than the speed of light.…”

Section: Introductionmentioning

confidence: 99%

Helicity-Sensitive Plasmonic Terahertz Interferometer

et al. 2020

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Plasmonic interferometry is a rapidly growing area of research with a huge potential for applications in terahertz frequency range. In this Letter, we explore a plasmonic interferometer based on graphene Field Effect Transistor connected to specially designed antennas. As a key result, we observe helicity-and phase-sensitive conversion of circularly-polarized radiation into dc photovoltage caused by the plasmon-interference mechanism: two plasma waves, excited at the source and drain part of the transistor interfere inside the channel. The helicity sensitive phase shift between these waves is achieved by using an asymmetric antenna configuration. The dc signal changes sign with inversion of the helicity. Suggested plasmonic interferometer is capable for measuring of phase difference between two arbitrary phase-shifted optical signals. The observed effect opens a wide avenue for phase-sensisitve probing of plasma wave excitations in two-dimensional materials.

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