Phase change dynamics in a polymer thin film upon femtosecond and picosecond laser irradiation

2005 ◽  
Vol 247 (1-4) ◽  
pp. 440-446 ◽  
Author(s):  
J. Bonse ◽  
S.M. Wiggins ◽  
J. Solis ◽  
T. Lippert
Keyword(s):  
Thin Film ◽  
Phase Change ◽  
Laser Irradiation ◽  
Picosecond Laser ◽  
Polymer Thin Film ◽  
Change Dynamics

The effect of an aluminum heat-sink layer on the laser-induced amorphization of SiOx/TeGeSn/SiOx phase-change recording films

1989 ◽  
Vol 47 ◽  
pp. 574-575
Author(s):  
Matthew R. Libera ◽  
Martin Chen
Keyword(s):  
Thin Film ◽  
Phase Change ◽  
Heat Sink ◽  
Multilayer Film ◽  
Glassy Phase ◽  
Film Structure ◽  
Glass Forming ◽  
Active Storage ◽  
Dielectric Layers ◽  
Amorphous States

Phase-change erasable optical storage is based on the ability to switch a micron-sized region of a thin film between the crystalline and amorphous states using a diffraction-limited laser as a heat source. A bit of information can be represented as an amorphous spot on a crystalline background, and the two states can be optically identified by their different reflectivities. In a typical multilayer thin-film structure the active (storage) layer is sandwiched between one or more dielectric layers. The dielectric layers provide physical containment and act as a heat sink. A viable phase-change medium must be able to quench to the glassy phase after melting, and this requires proper tailoring of the thermal properties of the multilayer film. The present research studies one particular multilayer structure and shows the effect of an additional aluminum layer on the glass-forming ability.

Effect of Illumination on Organic Polymer Thin-Film Transistors

2003 ◽  
Vol 771 ◽  
Author(s):  
Michael C. Hamilton ◽  
Sandrine Martin ◽  
Jerzy Kanicki
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Drain Current ◽  
Charge Carriers ◽  
Electrical Performance ◽  
Organic Polymer ◽  
Light Illumination ◽  
Polymer Thin Film ◽  
Channel Region ◽  
White Light Illumination

AbstractWe have investigated the effects of white-light illumination on the electrical performance of organic polymer thin-film transistors (OP-TFTs). The OFF-state drain current is significantly increased, while the drain current in the strong accumulation regime is relatively unaffected. At the same time, the threshold voltage is decreased and the subthreshold slope is increased, while the field-effect mobility of the charge carriers is not affected. The observed effects are explained in terms of the photogeneration of free charge carriers in the channel region due to the absorbed photons.

Conducting polymer thin film for optoelectronic devices applications

2021 ◽  
Author(s):  
Mohamed H. Abdel‐Aziz ◽  
Mohammed Zwawi ◽  
Ahmed F. Al‐Hossainy ◽  
Mohamed Sh. Zoromba
Keyword(s):  
Thin Film ◽  
Conducting Polymer ◽  
Optoelectronic Devices ◽  
Polymer Thin Film

scholarly journals A Theoretical Study on an Elastic Polymer Thin Film-Based Capacitive Wind-Pressure Sensor

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2133
Author(s):  
Xue Li ◽  
Jun-Yi Sun ◽  
Bin-Bin Shi ◽  
Zhi-Hang Zhao ◽  
Xiao-Ting He
Keyword(s):  
Thin Film ◽  
Closed Form ◽  
Pressure Sensor ◽  
Closed Form Solution ◽  
Form Solution ◽  
Wind Pressure ◽  
Polymer Thin Film ◽  
Movable Electrode ◽  
Elastic Polymer ◽  
Electrode Plate

This study is devoted to the design of an elastic polymer thin film-based capacitive wind-pressure sensor to meet the anticipated use for real-time monitoring of structural wind pressure in civil engineering. This sensor is composed of four basic units: lateral elastic deflection unit of a wind-driven circular polymer thin film, parallel plate capacitor with a movable circular electrode plate, spring-driven return unit of the movable electrode plate, and dielectric materials between electrode plates. The capacitance of the capacitor varies with the parallel move of the movable electrode plate which is first driven by the lateral elastic deflection of the wind-driven film and then is, after the wind pressure is reduced or eliminated, returned quickly by the drive springs. The closed-form solution for the contact problem between the wind-driven thin film and the spring-driven movable electrode plate is presented, and its reliability is proved by the experiment conducted. The numerical examples conducted show that it is workable that by using the numerical calibration based on the presented closed-form solution the proposed sensor is designed into a nonlinear sensor with larger pressure-monitoring range and faster response speed than the linear sensor usually based on experimental calibration.

Third-order optical nonlinearity of azobenzene side-chain polymer thin film

2007 ◽  
Vol 244 (6) ◽  
pp. 2166-2171 ◽  
Author(s):  
Tingchao He ◽  
Yongguang Cheng ◽  
Changshun Wang ◽  
Tingjian Jia ◽  
Pengwei Li ◽  
...  
Keyword(s):  
Thin Film ◽  
Optical Nonlinearity ◽  
Side Chain ◽  
Third Order ◽  
Polymer Thin Film ◽  
Chain Polymer

Electron Microscopy Study on Amorphous Ge-Sb-Te Thin Film for Phase Change Optical Recording

2003 ◽  
Vol 42 (Part 2, No. 10A) ◽  
pp. L1158-L1160 ◽  
Author(s):  
Muneyuki Naito ◽  
Manabu Ishimaru ◽  
Yoshihiko Hirotsu ◽  
Masaki Takashima
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Phase Change ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Optical Recording
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