Spin–orbit interaction of light serves as an important property of light, which deals with the study of polarization and phase modulations in the light beam. These studies are essential and principal characeristics of light beam that have been used for most of the nanophotonics applications. Silver nanoparticles (Ag NPs) prepared via biosynthesis are used for one of such nanophotonics application in scattering via studying the light scattered through these nanoparticles. The silver nanoparticles Ag NPs were synthesized using green method, where reduction of silver ions to silver nanoparticles happen during the reaction of aqueous solution of Ag NO₃ with the biomolecules present in fresh leaf extract of Coleus amboinicus plant. The nanoparticles were characterized using UV-visible (UV–vis) spectroscopy, Transmission electron microscopy (TEM) and Fourier Transform Infrared (FTIR) spectroscopy. TEM analysis shows the wide size distribution of spherical shape nanoparticles with 80 nm average size. The study of polarization and phase changes in the scattered light field has been carried out using Stokes polarimetry in forward direction scattering. Under the preliminary measurements of Polarimetry, the modification in the polarization components was studied by demonstrating changes in the Stokes S₂, S₃ parameters, polarization orientation (ψ) and ellipticity angle (χ) using transverse magnetic (TM) polarized Gaussian light beam.

光的自旋轨道相互作用是光的重要属性，它涉及光束的偏振和相位调制的研究。这些研究是已用于大多数纳米光子学应用的光束的基本和主要特征。通过生物合成制备的银纳米颗粒（Ag NPs）通过研究通过这些纳米颗粒散射的光而用于散射中的此类纳米光子学应用之一。使用绿色方法合成了银纳米颗粒Ag NPs，其中在Ag NO ₃水溶液与新鲜锦紫苏叶提取物中存在的生物分子反应期间，银离子还原为银纳米颗粒。植物。使用紫外可见光谱，透射电子显微镜（TEM）和傅里叶变换红外（FTIR）光谱对纳米颗粒进行表征。TEM分析显示平均粒径为80 nm的球形纳米颗粒的粒径分布较宽。已经在前向散射中使用斯托克斯偏振法对散射光场中的偏振和相位变化进行了研究。在极化的初步测量下，通过使用横向磁（TM）偏振高斯光束演示斯托克斯S ₂，S ₃参数，偏振方向（ψ）和椭圆率角（χ）的变化，研究了偏振分量的变化。