文档介绍：ABSTRACT
Because of the bright prospect for high-speed information processing, quantum
information technology has e the hottest research topic in recent years. Among the
promising candidates for putation, the single-atom system is an outstanding
one for its long coherence time, high controllability and high scalability. Atom chips
integrated with high-precision atom control devices are the best platform for practicability
and miniaturization of cold atom experiments. A basic model for puter can be
offered by bination of atom chips and single-atom thesis summarizes the
design of an atom chip system for single-atom trapping. The ponent of the system is
an atom chip which integrates micro lens waveguide on it. The ponent around
which the system is developed consists of two parts: an two-atom-chip assembly and a
ribbon waveguide with micro lens on its end face.
The two-atom-chip assembly contains two atom chips, a small one and a large one.
Main work of the assembly is to trap and convey cold atoms. Key points of the design are
wire layout, substrate materials and manufacturing process. The two-chip design enable the
two atom chips to meet different requirements: high mechanical strength, heavy carrying
current and thermal conductivity match with the vacuum chamber for the large one and high
reflectivity , high thermal conductivity and light carrying current for the small one.
Simulation results show that our design meet the requirement of transforming the atoms.
The micro-lens-integrated ribbon waveguide is used to transmit the laser and trap a
single atom. No crosstalk between neighbour channels is the most important requirement for
waveguide design. These are achieved by adjusting dimension and reflectivity of the
waveguide. Simulation results show that there is no crosstalk between the 10 µm -spacing
cores when the cross section of the cores are 4 µm *4 µm and reflectivity difference of core
and cladding is %.
The micro l