scholarly journals Internal Surface Plasmon Excitation as the Root Cause of Laser-Induced Periodic Plasma Structure and Self-Organized Nanograting Formation in the Volume of Transparent Dielectric

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1461
Author(s):  
Vladimir B. Gildenburg ◽  
Ivan A. Pavlichenko
Keyword(s):  
Laser Pulse ◽  
Surface Plasmon ◽  
Plasma Layer ◽  
Dielectric Material ◽  
Internal Surface ◽  
Fused Silica ◽  
Small Scale ◽  
Optical Discharge ◽  
Root Cause ◽  
Transparent Dielectric

A computer simulation of the dynamics of an optical discharge produced in the volume of a transparent dielectric (fused silica) by a focused femtosecond laser pulse was carried out taking into account the possibility of developing small-scale ionization-field instability. The presence of small foreign inclusions in the fused silica was taken into account with the model of a nanodispersed heterogeneous medium by using Maxwell Garnett formulas. The results of the calculations made it possible to reveal the previously unknown physical mechanism that determines the periodicity of the ordered plasma-field structure that is formed in each single breakdown pulse and is the root cause of the ordered volume nanograting formation in dielectric material exposed to a series of repeated pulses. Two main points are decisive in this mechanism: (i) the formation of a thin overcritical plasma layer at the breakdown wave front counter-propagated to the incident laser pulse and (ii) the excitation of the “internal surface plasmon” at this front, resulting in a rapid amplification of the corresponding spatial harmonic of random seed perturbations in the plasma and formation of a contrast structure with a period equal to the wavelength of the surface plasmon (0.7 of the wavelength in dielectric).

scholarly journals Surface Plasmon Polariton Triggered Generation of 1D-Low Spatial Frequency LIPSS on Fused Silica

2018 ◽  
Vol 8 (9) ◽  
pp. 1624 ◽  
Author(s):  
Simon Schwarz ◽  
Stefan Rung ◽  
Cemal Esen ◽  
Ralf Hellmann
Keyword(s):  
Spatial Frequency ◽  
Surface Plasmon ◽  
Dielectric Material ◽  
Periodic Structures ◽  
Scanning Speed ◽  
Fused Silica ◽  
Surface Structures ◽  
Femtosecond Laser Irradiation ◽  
Parameter Study ◽  
Periodic Surface

We report on the generation of low spatial frequency laser-induced periodic surface structures along straight lines on fused silica by spatially scanning the laser parallel to its polarization direction. The influence of the applied laser fluence and the scanning speed on the periodic surface structures is investigated. The parameter study shows that periodic structures appear in a limited parameter regime of combined fluence and scan speed with periodicities smaller than the laser wavelength. Most strikingly, we observe a perpendicular orientation of the self-assembled periodic structures to the electrical field of the laser, notably a previously unreported result for this dielectric material. This behavior is explained taking into account calculations of surface plasmon polaritons including a Drude model for free carrier excitation within silica by femtosecond laser irradiation.

Femtosecond laser pulse-train induced breakdown in fused silica: the role of seed electrons

2014 ◽  
Vol 47 (43) ◽  
pp. 435105 ◽  
Author(s):  
Kaihu Zhang ◽  
Lan Jiang ◽  
Xin Li ◽  
Xuesong Shi ◽  
Dong Yu ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Pulse Train ◽  
Fused Silica

scholarly journals Linear and nonlinear absolute phase effects in interactions of ulrashort laser pulses with a metal nano-layer or with a thin plasma layer

2007 ◽  
Vol 25 (3) ◽  
pp. 379-390 ◽  
Author(s):  
S. Varró
Keyword(s):  
Laser Pulse ◽  
Phase Difference ◽  
Plasma Layer ◽  
Thin Foil ◽  
Laser Pulses ◽  
Thomson Scattering ◽  
Carrier Envelope Phase ◽  
Absolute Phase ◽  
High Intensity Laser ◽  
Order Of Magnitude

It has been shown that in the scattered radiation, generated by an ultrashort laser pulse impinging on a metal nano-layer, non-oscillatory wakefields appears with a definite sign. The magnitude of these wakefields is proportional to the incoming field strength, and the definite sign of them is governed by the cosine of the carrier-envelope phase difference of the incoming pulse. When we let such a Wakefield excite the electrons of a secondary target (say an electron beam, a metal surface or a gas jet), we can obtain 100 percent modulation in the electron signal in a given direction. This scheme can serve as a basis for the construction of a robust linear carrier-envelope phase difference meter. At relativistic laser intensities, the target is considered as a plasma layer in vacuum produced from a thin foil by a prepulse, which is followed by the main high-intensity laser pulse. The nonlinearities stemming from the relativistic kinematics lead to the appearance of higher-order harmonics in the scattered spectra. In general, the harmonic peaks are downshifted due to the presence of an intensity-dependent factor. This phenomenon is analogous to the famous intensity-dependent frequency shift in the nonlinear Thomson scattering on a single electron. In our analysis, an attention has also been paid to the role of the carrier-envelope phase difference of the incoming few-cycle laser pulse. It is also shown that the spectrum has a long tail where the heights of the peaks vary practically within one order of magnitude forming a quasi-continuum. Fourier synthesizing the components from this plateau region attosecond pulses has obtained.

A Multichannel Filter Based on the Finite Plasma Photonic Crystal

2013 ◽  
Vol 538 ◽  
pp. 297-300 ◽  
Author(s):  
Chien Jang Wu ◽  
Ya Ju Lee ◽  
Tzu Chyang King ◽  
Wen Kai Kuo
Keyword(s):  
Photonic Crystal ◽  
Plasma Layer ◽  
Dielectric Material ◽  
Stop Band ◽  
Pass Band ◽  
Multiple Channels ◽  
Photonic Stop Band ◽  
Multichannel Filter ◽  
Plasma Photonic Crystal ◽  
Transmission Filter

A design of multichannel transmission filter at microwave is proposed. It is based on the use of the finite plasma photonic crystal operating at frequency below the plasma frequency. We consider a design structures of (AB)qA, where A is the dielectric material, B is the plasma layer, and q is the number of periods. It is found that the number of channels is equal to q-1. We show that the locations such multiple channels are in the pass band of the infinite plasma-dielectric photonic crystal. The idea of such design is thus to engineer the photonic pass band, which is fundamentally different from the usual design by engineering the photonic stop band like the multilayer Fabry-Perot transmission filter. The physical mechanism of multiple channels is also discussed.

scholarly journals Control of the surface plasmon dispersion and Purcell effect at the metamaterial-dielectric interface

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Konstantin A. Ivanov ◽  
Konstantin M. Morozov ◽  
Galia Pozina ◽  
Azat R. Gubaydullin ◽  
Elizaveta I. Girshova ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Dielectric Material ◽  
Local Density ◽  
Purcell Effect ◽  
Negative Effects ◽  
Purcell Factor ◽  
Long Wavelength ◽  
Effective Media ◽  
Dielectric Structures ◽  
Peak Value

AbstractThe use of metamaterial as a way to mitigate the negative effects of absorption in metals on the Purcell effect in metal-dielectric structures is investigated. A layered metal-dielectric structure is considered as an anisotropic medium in the long-wavelength limit. The dispersion of the surface plasmon appearing at the boundary between such a structure and a different dielectric material, as well as the position of the peak in the local density of states are studied for various combinations of materials and filling factors of the periodic structure. The calculated frequency dependence of the Purcell factor demonstrates an increase in peak value compared to the conventional plasmonic structure. The results obtained using effective media approach are compared to the results of numerical modelling.

Sign in / Sign up

Export Citation Format

Share Document