Design and optimization of tapered structure of near‐field fibre probe based on finite‐difference time‐domain simulation
The finite‐difference time‐domain method was employed to simulate light propagation in tapered near‐field fibre probes with small metal aperture. By conducting large‐volume simulations, including tapered metal‐cladding waveguide and connected optical fibre waveguide, we illustrated the coupling between these guiding modes as well as the electric field distribution in the vicinity of the aperture. The high collection efficiency of a double‐tapered probe was reproduced and was ascribed to the shortening of the cut‐off region and the efficient coupling to the guiding mode of the optical fibre. The dependence of the efficiency on the tapered structure parameters was also examined.
Spatial Resolution of Near-Field Scanning Optical Microscopy with Sub-Wavelength Aperture
The finite-difference time-domain (FDTD) method is employed to solve the three dimensional Maxwell equation for the situation of near-field microscopy using a sub-wavelength aperture. Experimental result on unexpected high spatial resolution is reproduced by our computer simulation.
Great American Bridges and Dams
Bridges: Spanning the Nation. Dams: Controlling a Precious Resource. Saving Bridges and Dams. Guide to the Guide. THE BRIDGES AND DAMS. New England. Mid-Atlantic. South. Midwest. Southwest. West. Epilogue: The Ones That Got Away. Further Reading. Information Sources. Index.