Based on the achievements made, we will suggest the following topics as extensions of our research.
1. If correspondences and coupling mechanisms between existing propagation modes and surface plasmons modes can be analyzed and figured out, the energy probably can be transferred more efficiently and the overall transmission might be further enhanced accordingly. To increase the efficiency of the system, a practical solution is to focus the propagating field inside the fiber into a smaller spot on the nano‐waveguide. Therefore, a fiber lens is also suggested to be inserted between the nano‐waveguide and the fiber.
2. In this thesis, both the simulation and experiment on the near‐field light source were conducted in the absence of the disk. However, the actual field will be altered if a surface is moving to the proximity of the exit plane of the
nano‐waveguide. Therefore, the interaction between the external surface and the emitted field from a nano‐waveguide should be studied to characterize the effect of the surface on the field and the transmission. In addition, although we have demonstrated the operation of our fiber head system on a spinning disk, we would like to suggest a writing test on the storage medium according to the study on the interaction between the emitted field and the disk surface.
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