Dynamical Behaviors And Break Junctions Based On Mechanical Systems

Harmonic oscillation is a s a fundamental physical phenomenon widespread in nature. The most classical example in textbook is the mechanical harmonic oscillator. With the development of modern technology, mechanical oscillator in microscale and nanoscale has been achieved by fabrication techniques. The scaled mechanical oscillator has features include:high resonance frequency; quality fac-tor Q usually in103-105range which is much higher than the electronic resonance circuit. These features make the mechanical oscillator is very suitable for a variety of technology applications, such as sensors, actuators and so on.When the mechanical system in microscale and nanoscale, related control and detection work will start in this regime. Typical mature technological application-s include Atomic Force Microscopy and Magnetic Resonance Force Microscopy, which using interaction between a specific atom and its neighboring atoms, and interaction between spins and a magnetic field gradient. Their resolution achieve atomic-scale and nano-scale imaging. These imaging techniques show that we can obtain the information of the microscopic system through the mechanical system through the method which using a mechanical system couple to a microscopic sys-tem. Therefore, exploring the coupling between mechanical oscillator and other systems will be great significance in precision measurement.Here we focus on the mechanical system to expand the theoretical and ex-perimental research. The work is divided into the following:1. We designed and constructed the experimental platform for mechanical de-tection at room temperature. Due to the help from finite element analysis, we present some simulation results in this work.2. We designed an experimental scheme for dynamical behaviors of two cou-pling mechanical systems based on above mentioned platform. The scheme can achieve electromagnetic induced transparency, Autler-Townes effect and Fano resonance. Furthermore, we give the quantity analysis in discerning between electromagnetic induced transparency and Autler-Townes effect.3. We proposed a new method to break junctions by utilize the actuation of the mechanical system. This method possess features include high bandwidths and high integrabilities which have potential applications in nanosensors and single molecular devices.