We examine the timing dependence of nanophotonic devices based on optical excitation transfer via optical near-field interactions at the nanometer scale. We theoretically analyze the dynamic behavior of a two-input nanophotonic switch composed of three quantum dots based on a density matrix formalism while assuming arrival-time differences, or skew, between the inputs. The analysis reveals that the nanophotonic switch is resistant to a skew longer than the input signal duration, and the tolerance to skew is asymmetric with respect to the two inputs. The skew dependence is also experimentally examined based on near-field spectroscopy of InGaAs quantum dots, showing good agreement with the theory. Elucidating the dynamic properties of nanophotonics, together with the associated spatial and energy dissipation attributes at the nanometer scale, will provide critical insights for novel system architectures.

Recent progress on application of interactions between optical near-field and nanoscale materials and atoms is reviewed. Photochemical vapor deposition of Zn dots and lines with the size of sub-100 nm has been realized by using an ultraviolet optical near field. Deposition of nanoscale ZnO is also revealed. Manipulation of atoms is then described to control the thermal motion of atoms in high vacuum. Experimental and theoretical results of manipulation by using optical near field generated on a prism surface, hollow fiber, and fiber probe are presented. Finally, quantum theoretical treatment of optical near field is given.