Dielectric or plasmonic Mie object at air–liquid interface: The transferred and the traveling momenta of photon*

Project supported by the World Academy of Science (TWAS) research grant 2018 (Ref: 18-121 RG/PHYS/AS I-FR3240303643) and North South University (NSU), Bangladesh, internal research grant 2018-19 & 2019-20 (approved by the members of BOT, NSU, Bangladesh).
Mahdy M R C1, 2, †, Rivy Hamim Mahmud1, Jony Ziaur Rahman1, Alam Nabila Binte3, Masud Nabila1, Quaderi Golam Dastegir Al4, Moosa Ibraheem Muhammad5, Rahman Chowdhury Mofizur6, Sohel Rahman M5, ‡
       

Diameter of the silica object is 4000 nm and time averaged force has been calculated on the silica object using Eq. (1). The dash line represents the integration boundary. The lower figure shows the Poynting vector distribution for the incident angle of 45° for each specific case. 2D simulation results: (a) object half immersed in air and water medium of index 1.33 (or a medium with refractive index 5). Inset: optical pulling force occurs for different angles of incident light. For the case of index = 5, the optical pulling force increases at least around 100 times than the air–water case for different angles of incident light. Lower figure: Poynting vector distribution for the case where the second background is water. (b) Object half immersed in air and extremely small (width of 10 nm only) background of water. Inset: optical pulling force occurs (almost similar to the force of the air–water case in (a)) for different angles of incident light.