In this paper, the bipolar resistive switching properties of Ge2Sb2Te5 material are studied. By changing the voltage step, compliance current, cycle number and other parameters, the characteristics of the resistive switching voltage, switching ratio, switching polarity and cycle repetition of Ge2Sb2Te5 were tested. The experimental results show that the Ge2Sb2Te5 material film exhibit reversible and reproducible bi-stable resistive switching with lower threshold voltage. The reversible resistance switching between HRS and LRS was induced by bias amplitude and polarity. The electrical resistance ratio of HRS/LRS was ~80:1. After 100 test cycles, the ratio of high resistance state (HRS) and low resistance state (LRS) is not obviously changed, which indicates that the Ge2Sb2Te5 material has excellently nonvolatile bipolar resistance storage characteristics.
Simultaneous phase-shifting ellipsometry based on a grating beamsplitter is presented. In the corresponding setup, an orthogonal grating and analyzer array are used. The latter is composed of four separate analyzers arranged in a 2×2 grid, the polarization axes of which are set to 0, 45, 90, and 135 deg. A mask allows only four diffracted beams of the fist order, having the same optical intensities, to pass. Each beam is incident on one of the analyzers of the array. The intensities of the four beams are simultaneously detected by a quadrant detector. The ellipsometric parameters are obtained using the four intensity signals. The feasibility of simultaneous phase shifting ellipsometry is thus demonstrated.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.