Reversible Optical Switching of Infrared Antenna Resonances with Ultrathin Phase-Change Layers Using Femtosecond Laser Pulses

ACS Photonics ◽  
2014 ◽  
Vol 1 (9) ◽  
pp. 833-839 ◽  
Author(s):  
Ann-Katrin U. Michel ◽  
Peter Zalden ◽  
Dmitry N. Chigrin ◽  
Matthias Wuttig ◽  
Aaron M. Lindenberg ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Phase Change ◽  
Optical Switching ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

Color Switching with Enhanced Optical Contrast in Ultrathin Phase-Change Materials and Semiconductors Induced by Femtosecond Laser Pulses

ACS Photonics ◽  
2015 ◽  
Vol 2 (2) ◽  
pp. 178-182 ◽  
Author(s):  
Franziska F. Schlich ◽  
Peter Zalden ◽  
Aaron M. Lindenberg ◽  
Ralph Spolenak
Keyword(s):  
Femtosecond Laser ◽  
Phase Change ◽  
Phase Change Materials ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Optical Contrast ◽  
Color Switching

scholarly journals Plasmonic layer-selective all-optical switching of magnetization with nanometer resolution

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
D. O. Ignatyeva ◽  
C. S. Davies ◽  
D. A. Sylgacheva ◽  
A. Tsukamoto ◽  
H. Yoshikawa ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Magnetic Recording ◽  
Optical Switching ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
All Optical ◽  
Polarization Axis ◽  
Linearly Polarized ◽  
All Optical Switching ◽  
Better Than

Abstract All-optical magnetization reversal with femtosecond laser pulses facilitates the fastest and least dissipative magnetic recording, but writing magnetic bits with spatial resolution better than the wavelength of light has so far been seen as a major challenge. Here, we demonstrate that a single femtosecond laser pulse of wavelength 800 nm can be used to toggle the magnetization exclusively within one of two 10-nm thick magnetic nanolayers, separated by just 80 nm, without affecting the other one. The choice of the addressed layer is enabled by the excitation of a plasmon-polariton at a targeted interface of the nanostructure, and realized merely by rotating the polarization-axis of the linearly-polarized ultrashort optical pulse by 90°. Our results unveil a robust tool that can be deployed to reliably switch magnetization in targeted nanolayers of heterostructures, and paves the way to increasing the storage density of opto-magnetic recording by a factor of at least 2.

Observation of crystallization in amorphous phase change films induced by femtosecond laser pulses

2005 ◽  
Author(s):  
Guangjun Zhang ◽  
Donghong Gu ◽  
Xiongwei Jiang ◽  
Qingxi Chen ◽  
Fuxi Gan
Keyword(s):  
Femtosecond Laser ◽  
Phase Change ◽  
Amorphous Phase ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

scholarly journals Coherent scatter-controlled phase-change grating structures in silicon using femtosecond laser pulses

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Yasser Fuentes-Edfuf ◽  
Mario Garcia-Lechuga ◽  
Daniel Puerto ◽  
Camilo Florian ◽  
Adianez Garcia-Leis ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Phase Change ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Coherent Scatter

Melting, Vaporization, and Resolidification in a Thin Gold Film Irradiated by Multiple Femtosecond Laser Pulses

2013 ◽  
Vol 135 (2) ◽  
Author(s):  
Yijin Mao ◽  
Yuwen Zhang ◽  
J. K. Chen
Keyword(s):  
Liquid Phase ◽  
Femtosecond Laser ◽  
Phase Change ◽  
Gold Film ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Pulse Number ◽  
Ablation Depth ◽  
Maximum Temperature ◽  
Clapeyron Equation

Melting, vaporization, and resolidification in a gold thin film subject to multiple femtosecond laser pulses are numerically studied in the framework of the two-temperature model. The solid-liquid phase change is modeled using a kinetics controlled model that allows the interfacial temperature to deviate from the melting point. The kinetics controlled model also allows superheating in the solid phase during melting and undercooling in the liquid phase during resolidification. Superheating of the liquid phase caused by nonequilibrium evaporation of the liquid phase is modeled by adopting the wave hypothesis, instead of the Clausius–Clapeyron equation. The melting depth, ablation depth, and maximum temperature in both the liquid and solid are investigated and the result is compared with that from the Clausius–Clapeyron equation based vaporization model. The vaporization wave model predicts a much higher vaporization speed, which leads to a deeper ablation depth. The relationship between laser processing parameters, including pulse separation time and pulse number, and the phase change effect are also studied. It is found that a longer separation time and larger pulse number will cause lower maximum temperature within the gold film and lower depths of melting and ablation.

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