Spectral sensitivity of two-dimensional nanohole array surface plasmon polariton resonance sensor

Abstract

An analytical expression of spectral sensitivity derived from a surface plasmon polariton dispersion relation for a two-dimensional nanohole array surface plasmon polariton resonance sensor is presented. The sensitivity of the nanohole array sensor depends on the periodicity of the array and the order of the excited surface plasmon polariton modes. The analytical expression is further confirmed by rigorous electromagnetic simulation and validated by experimental results. Real-time monitoring of protein-protein specific bonding is performed to demonstrate the integrated microfluidic nanohole array surface plasmon resonance biosensor.

Improving Surface Plasmon Detection in Gold Nanostructures Using a Multi‐Polarization Spectral Integration Method

“…[4][5][6][7] Recently, periodic gold nanohole arrays or nanoslit arrays have been utilized for biosensing applications. [8][9][10][11][12][13][14][15][16][17][18][19] By measuring changes in the resonant angle, wavelength or intensity, the amounts of surface binding events are quantitatively estimated. The detection limit of the SPR sensor is usually characterized by minimum refractive index unit (RIU).…”

Photoacoustic Based Surface Plasmon Resonance Spectroscopy: An Investigation

“…The uses of lock-in amplifier effectively increases S/N ratio and enables the simultaneous measurement of phase and amplitude of the PA signal with respect to light modulation frequency. Other than spectral measurements, the photoacoustic technique can also be used in several other applications such as measurement of thermal diffusivity, detection of phase transition, depth profiling, subsurface imaging etc [7,8,9,10]. [23][24][25] The main aspect of cell design is the positioning of the microphone with respect to incident light to avoid scattered light and to improve performance [11,12,13].…”

“…Momentum matching can be achieved by various techniques. [4][5][6][7] The simplest way to achieve momentum matching between excitation photon and plasmon is utilization of high index prism over the metal medium. SP excitation using prism coupling technique is based on either Kretschmann or Otto configuration.…”

Cavity resonant mode in a metal film perforated with two-dimensional triangular lattice hole arrays

“…Many theories have been developed to understand the mechanism of such phenomenon [4 9]. It is generally believed that the excitation and coupling of surface plasmon-polaritons (SPPs) at the planar metal-dielectric interface play an important role [4,6,9]. The discrete translational symmetry introduced by the hole arrays allows the coupling between the incident light and the otherwise non-radiative SPPs.…”