Opt Express. 2020 Sep 28;28(20):29033-29043. doi: 10.1364/OE.401802.
The total internal reflection ellipsometry (TIRE) method was used for the excitation and study of the sensitivity properties of the hybrid Tamm plasmon polariton - surface plasmon polariton (TPP-SPP) and single surface plasmon resonance (SPR) modes of the GCSF receptor immobilization. Additionally, the optimized sensitivity of the hybrid TPP-SPP mode was investigated and compared with the single SPR mode when the BSA proteins formed a layer on the gold surface. The dispersion relations for the hybrid TPP-SPP and single SPR modes were used to explain the enhanced sensitivity of the ellipsometric parameters for the hybrid TPP-SPP mode over the conventional SPR. The SPP component (δΔ/δλ=53.9°/nm) of the hybrid TPP-SPP mode was about 6.4 times more sensitive than single SPR (δΔ/δλ=8.4°/nm) for the BSA protein layer on the gold film. It was found that the sensitivity of the hybrid plasmonic mode can be made controllable by using the strong coupling effect between the TPP and SPP components. The strong coupling regime reduces absorption and scattering losses of the metal for the SPP component in the hybrid TPP-SPP mode and, as a result, narrows the plasmonic resonance.
全内反射椭圆偏振法（TIRE）被用于激发和研究混合的 Tamm 等离子体激元-表面等离子体激元（TPP-SPP）和 GCSF 受体固定化的单一表面等离子体共振（SPR）模式的灵敏度特性。此外，当 BSA 蛋白在金表面形成一层时，研究并比较了优化后的混合 TPP-SPP 模式的灵敏度与单一 SPR 模式的灵敏度。使用混合 TPP-SPP 和单一 SPR 模式的色散关系来解释混合 TPP-SPP 模式的椭圆偏振参数的增强灵敏度超过传统的 SPR。对于金膜上的 BSA 蛋白层，混合 TPP-SPP 模式的 SPP 分量（δΔ/δλ=53.9°/nm）比单一 SPR（δΔ/δλ=8.4°/nm）的灵敏度高约 6.4 倍。研究发现，通过利用 TPP 和 SPP 分量之间的强耦合效应，可以使混合等离子体模式的灵敏度具有可控性。在混合 TPP-SPP 模式中，强耦合状态减少了 SPP 分量的金属吸收和散射损耗，从而使等离子体共振变窄。
