New trends in plasmonic (bio)sensing

Abstract

The strong enhancement and localization of electromagnetic field in plasmonic systems have found applications in many areas, which include sensing and biosensing. In this paper, an overview will be provided of the use of plasmonic phenomena in sensors and biosensors with emphasis on two main topics. The first is related to possible ways to enhance the performance of sensors and biosensors based on surface plasmon resonance (SPR), where examples are given of functionalized magnetic nanoparticles, magnetoplasmonic effects and use of metamaterials for SPR sensing. The other topic is focused on surface-enhanced Raman scattering (SERS) for sensing, for which uniform, flexible, and reproducible SERS substrates have been produced. With such recent developments, there is the prospect of improving sensitivity and lowering the limit of detection in order to overcome the limitations inherent in ultrasensitive detection of chemical and biological analytes, especially at single molecule levels.

Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

“…The high sensitivity and figure of merit can also be achieved in a broad-spectrum range for promising applications in nanophotonics. With the recent advances in plasmonic sensors, there is an anticipation of enhancing sensitivity and reducing the detection limit to overcome the limitations in ultrasensitive sensing of biological and chemical analytes, especially at single molecule levels [ 103 , 104 , 105 ].…”

Plasmonics for Telecommunications Applications

“…c being the free-space propagating wavevector, and ε m < 0 and ε d > 0 being the permittivities for the metal and dielectric media [34][35][36], respectively. Figure 1a,b show the widely known Kretschmann [37] and Otto [38] configurations, respectively, based on the attenuated total reflection (ATR) method.…”

“…is very sensitive to dielectric properties of the surrounding media, which is extensively exploited for plasmonic sensing and biosensing purposes [34][35][36]. In telecommunications applications, on the other hand, the Kretschmann setup is used for photodetection and optical signal processing through the excitation and detection of Bloch surface waves (BSWs) [39,40].…”

Совмещение Конфигураций Отто И Кретчмана Для Возбуждения Различных Мод Поверхностных Плазмон-Поляритонов

“…Принцип действия датчиков на поверхностных плазмон-поляритонах (ППП) основан на физическом эффекте изменения резонансной частоты поверхностных плазмон-поляритонных волн в зависимости от диэлектрической проницаемости среды, граничащей с чувствительным металлическим (плазмонным) слоем [1][2][3][4][5][6]. Существует две классические конфигурации призменного возбуждения поверхностных плазмон-поляритонных волн [1,7,8].…”