Tunable Ultrafast Optical Switching via Waveguided Gold Nanowires

2008 ◽  
Vol 20 (23) ◽  
pp. 4455-4459 ◽  
Author(s):  
Xinping Zhang ◽  
Baoquan Sun ◽  
Justin M. Hodgkiss ◽  
Richard H. Friend
Keyword(s):  
Optical Switching ◽  
Gold Nanowires ◽  
Ultrafast Optical

Ultrafast optical switching based on mutually enhanced resonance modes in gold nanowire gratings

Nanoscale ◽  
2019 ◽  
Vol 11 (38) ◽  
pp. 17807-17814 ◽  
Author(s):  
Yan Wang ◽  
Xinping Zhang
Keyword(s):  
Optical Switching ◽  
Modulation Depth ◽  
Optical Switch ◽  
Gold Nanowires ◽  
Gold Nanowire ◽  
Ultrafast Optical ◽  
Resonance Modes ◽  
Thick Gold

An optical switch as fast as 290 fs using thick gold nanowires to achieve a modulation depth of >16%.

scholarly journals Ultrafast optical manipulation of magnetic order in ferromagnetic materials

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Chuangtang Wang ◽  
Yongmin Liu
Keyword(s):  
Data Storage ◽  
Optical Switching ◽  
Ultrafast Lasers ◽  
Transport Model ◽  
Magnetic Interaction ◽  
Ferromagnetic Materials ◽  
Magnetic Storage ◽  
Magnetization Dynamics ◽  
Quarter Century ◽  
Ultrafast Optical

Abstract The interaction between ultrafast lasers and magnetic materials is an appealing topic. It not only involves interesting fundamental questions that remain inconclusive and hence need further investigation, but also has the potential to revolutionize data storage technologies because such an opto-magnetic interaction provides an ultrafast and energy-efficient means to control magnetization. Fruitful progress has been made in this area over the past quarter century. In this paper, we review the state-of-the-art experimental and theoretical studies on magnetization dynamics and switching in ferromagnetic materials that are induced by ultrafast lasers. We start by describing the physical mechanisms of ultrafast demagnetization based on different experimental observations and theoretical methods. Both the spin-flip scattering theory and the superdiffusive spin transport model will be discussed in detail. Then, we will discuss laser-induced torques and resultant magnetization dynamics in ferromagnetic materials. Recent developments of all-optical switching (AOS) of ferromagnetic materials towards ultrafast magnetic storage and memory will also be reviewed, followed by the perspectives on the challenges and future directions in this emerging area.

INTERBAND TWO-PHOTON TRANSITION IN MOTT INSULATOR AS A NEW MECHANISM FOR ULTRAFAST OPTICAL NONLINEARITY

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3628-3632 ◽  
Author(s):  
M. Ashida ◽  
T. Ogasawara ◽  
N. Motoyama ◽  
H. Eisaki ◽  
S. Uchida ◽  
...  
Keyword(s):  
Excited State ◽  
Optical Switching ◽  
Near Infrared ◽  
Optical Nonlinearity ◽  
Infrared Region ◽  
Pump Probe ◽  
Two Photon ◽  
Ultrafast Optical ◽  
Order Of Magnitude ◽  
Probe Transmission

The dimensionality dependence of optical nonlinearity in cuprates was investigated by sub-picosecond pump-probe transmission measurements in the near-infrared region. It was found that cuprates with one-dimensional Cu-O networks show nonlinearity one order of magnitude larger than that of conventional band semiconductors and picosecond relaxation of the excited state. In contrast, a two-dimensional cuprate shows one order of magnitude smaller nonlinearity and slower decay of the excited state, as well as picosecond relaxation. The possibility for application of the present material to all-optical switching devices is also discussed.

scholarly journals Ultrafast optical switching based on nonlinear polarization rotation in silicon waveguides

2010 ◽  
Vol 18 (11) ◽  
pp. 11514 ◽  
Author(s):  
Jonathan Y. Lee ◽  
Lianghong Yin ◽  
Govind P. Agrawal ◽  
Philippe M. Fauchet
Keyword(s):  
Optical Switching ◽  
Polarization Rotation ◽  
Nonlinear Polarization ◽  
Silicon Waveguides ◽  
Ultrafast Optical ◽  
Nonlinear Polarization Rotation
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