Plasmon-Waveguide Resonances with Enhanced Figure of Merit and Their Potential for Anisotropic Biosensing in the Near Infrared Region

Mahajna, Said; Neumann, Michal; Eyal, Ofer; Shalabney, Atef

doi:10.1155/2016/1898315

Cited by 7 publications

(3 citation statements)

References 27 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PWR was interrogated mainly in the angular mode [18]. Recently, a study for the spectral mode for both TE and TM polarization was published [19]. A comparison study of the SPR and PWR sensors has been performed showing less sensitivity in the PWR case; however, the FoM was improved because the FWHM was less than that in the SPR case by more than an order of magnitude [20].…”

Section: Introductionmentioning

confidence: 99%

Improved Detection of Plasmon Waveguide Resonance Using Diverging Beam, Liquid Crystal Retarder, and Application to Lipid Orientation Determination

Isaacs

Harté

Alves

et al. 2019

Sensors

View full text Add to dashboard Cite

Plasmon waveguide resonance (PWR) sensors exhibit narrow resonances at the two orthogonal polarizations, transverse electric (TE) and transverse magnetic (TM), which are narrower by almost an order of a magnitude than the standard surface plasmon resonance (SPR), and thus the figure of merit is enhanced. This fact is useful for measuring optical anisotropy of materials on the surface and determining the orientation of molecules with high resolution. Using the diverging beam approach and a liquid crystal retarder, we present experimental results by simultaneous detection of TE and TM polarized resonances as well as using fast higher contrast serial detection with a variable liquid crystal retarder. While simultaneous detection makes the system simpler, a serial one has the advantage of obtaining a larger contrast of the resonances and thus an improved signal-to-noise ratio. Although the sensitivity of the PWR resonances is smaller than the standard SPR, the angular width is much smaller, and thus the figure of merit is improved. When the measurement methodology has a high enough angular resolution, as is the one presented here, the PWR becomes advantageous over other SPR modes. The possibility of carrying out exact numerical simulations for anisotropic molecules using the 4 × 4 matrix approach brings another advantage of the PWR over SPR on the possibility of extracting the orientation of molecules adsorbed to the surface. High sensitivity of the TE and TM signals to the anisotropic molecules orientation is found here, and comparison to the experimental data allowed detection of the orientation of lipids on the sensor surface. The molecular orientations cannot be fully determined from the TM polarization alone as in standard SPR, which underlines the additional advantage of the PWR technique.

show abstract

Section: Introductionmentioning

confidence: 99%

Improved Detection of Plasmon Waveguide Resonance Using Diverging Beam, Liquid Crystal Retarder, and Application to Lipid Orientation Determination

Isaacs

Harté

Alves

et al. 2019

Sensors

View full text Add to dashboard Cite

show abstract

“…Surface plasmon coupled emission (SPCE) technique, based on the near‐field interaction between fluorophores and surface plasmons on metal surfaces, has attracted increasing attention in sensor technology, bioanalysis, and imaging technique . SPCE is considered as the reverse process of surface plasmon resonance (SPR) or plasmon waveguide resonance (PWR); both phenomena can occur in the same SPR planar substrate with dielectric layer of different thickness. Numerical simulations show an increase of the penetration depth by four times in PWR compared with SPR .…”

Section: Introductionmentioning

confidence: 99%

Influence of Sample Thickness on Surface Plasmon Coupled Emission (SPCE) over a Large Range in Water

Weng

Liu

et al. 2018

Phys. Status Solidi A

View full text Add to dashboard Cite

The distance dependence of surface plasmon coupled emission (SPCE) has not been intensively studied in water, though most biological events, biosensing, and chemical reactions happen in aqueous media. Taking Rhodamine B (RhB) in poly(methyl methacrylate) (PMMA) film as a model fluorescent sample, the authors characterize the optical properties of the SPCE in water using scanning angle fluorescence spectroscopy with Kretschmann (KR) excitation over a large sample thickness range up to 2000 nm. A big difference is observed between the distribution of the incident angle or the emission angle in water and that in air for films of the same thickness. The distance dependence of SPCE in water differes greatly from that in air, with fewer angular positions distributed in narrower angle range. A sound understanding of the influence of sample thickness on SPCE in different media could provide a guideline in experimental designs and reduce the cost of trial‐and‐error for the application of SPCE in sensor designing, bioanalysis, and in situ assessment.

show abstract

“…The Dielectric loaded waveguide (DLWGs) is the extension of conventional SPR sensor, when a thick dielectric layer such as silicon dioxide or some polymer like PMMA is deposited on the metal surface, this gives rise to the excitation of two additional guided modes that allow the measurement in both transverse magnetic (TM) and transverse electric (TE) polarization states. The presence of the WG modes excited by both TM and TE polarized light, make the DLWG spectroscopy particularly useful to probe the birefringence and optical dichroism of anisotropic materials such as lipid bilayer membranes, selfassembled monolayers and thin film [64,65]. The desired results were achieved from the four optical parameters (( , ) ( , )) rather than two in the conventional SPR platform.…”

Section: Dielectric Loaded Waveguide (Dlwgs)mentioning

confidence: 99%

Surface Plasmon Resonance Spectroscopy for the Characterization of Nanoparticles, Organic Thin Film and 2-D Materials

ZAMAN¹

View full text Add to dashboard Cite

Studying and carrying out high level scientific research was a great honor for me and I am very grateful to all of peoples who have helped me a lot with their guidance, knowledge, assistance and patience. I am deeply thankful to my supervisor Tommaso Del Rosso who is incredibly smart, good and very kind person. It is his trust and motivation from beginning to end that enables me to focus my mind and efforts on my research.

show abstract

Plasmon-Waveguide Resonances with Enhanced Figure of Merit and Their Potential for Anisotropic Biosensing in the Near Infrared Region

Cited by 7 publications

References 27 publications

Improved Detection of Plasmon Waveguide Resonance Using Diverging Beam, Liquid Crystal Retarder, and Application to Lipid Orientation Determination

Improved Detection of Plasmon Waveguide Resonance Using Diverging Beam, Liquid Crystal Retarder, and Application to Lipid Orientation Determination

Influence of Sample Thickness on Surface Plasmon Coupled Emission (SPCE) over a Large Range in Water

Surface Plasmon Resonance Spectroscopy for the Characterization of Nanoparticles, Organic Thin Film and 2-D Materials

Contact Info

Product

Resources

About