The emission of photons and the dynamics of submicrodefects on the surface of noble metals

Абрамова, К. Б.; Vettegren, V. I.; Щербаков, И. П.; Svetlov, V. N.

doi:10.1134/1.1451979

Cited by 4 publications

(6 citation statements)

References 2 publications

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“…Abramova et al have shown that stress cycling of metal samples by laser pulses of equal power that leave the surface intact, changes the surface microrelief and initiates luminescence from the back side. The luminescence intensity decreases from cycle to cycle.…”

Section: Introductionmentioning

confidence: 99%

“…Mechanoluminescence (ML) is an interesting luminescence phenomenon, whereby light emission in solids is caused by mechanical stimuli such as grinding, rubbing, cutting, cleaving, shaking, scratching, compressing, loading, crushing and impulsive deformation (1,2). Researchers have attempted to check the affordability of laser pulses as a source of mechanical energy (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). Because a laser-induced shock wave is associated with a mechanical factor, namely pressure (15), its exposure on metal should stimulate ML.…”

Section: Introductionmentioning

confidence: 99%

“…(3) used a pulsed Nd:YAG laser as a source of mechanical energy for the first time to study the tribo-ML, popularly called triboluminescence, of crystalline materials. Subsequently, laser pulse-induced ML has been studied for different metals such as copper, gold, silver, platinum, tungsten and molybdenum (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). Abramova et al (4)(5)(6) reported the luminescence excited on the back side of metal targets irradiated with laser pulses of energy substantially below the plasma-flare formation threshold, and calculated the temporal and spatial distributions of temperature, thermal stresses and rate of thermal-stress variation in a sample.…”

Section: Introductionmentioning

confidence: 99%

“…In a further investigation, Abramova et al (8) calculated the photon emission pulse generated on the back side of a metallic sample, with a detailed comparison with experimental data, and concluded that the dynamics of a luminescence pulse from the back side of a metal sample irradiated by a laser shot on its front side correlates with the dynamics of dislocations emerging on the surface. Abramova et al (9) have shown that stress cycling of metal samples by laser pulses of equal power that leave the surface intact, changes the surface microrelief and initiates luminescence from the back side. The luminescence intensity decreases from cycle to cycle.…”

Section: Introductionmentioning

confidence: 99%

“…Starting from this supposition, Abramova et al estimated the density of dislocations emerging under irradiation. It has been found that the rate of accumulation of dislocations decreases with time upon stress cycling.…”

Section: Introductionmentioning

confidence: 99%

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Laser power dependence of mechanoluminescence in metals

2016

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Mechanoluminescence (ML) glow is produced on the back side when the front of a metal sample is irradiated with infrared Nd:YAG laser pulses. An incident laser beam with a power density below the plasma-flare onset threshold causes a rise in temperature in the studied metal. As the incident laser power density increases, the intensity of the ML glow signal also increases. On the basis of the laser power density-induced temperature, an expression is derived for the temperature-induced thermal stress. An expression is derived for the correlation between thermal stress and laser power density, which indicates that the temperature-induced thermal stress is directly related to the incident laser power density. In the region of plastic deformation, temperature-induced thermal stress is related to the strain and, consequently, to the emitted ML intensity. Finally, an expression is derived for the laser power dependence of the ML intensity, and good agreement is found between the theoretical and experimental results. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Laser power dependence of mechanoluminescence in metals

2016

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Luminescence of Triboplasma: Origin, Features, and Behavior

Nevshupa

Hiratsuka

2016

Triboluminescence

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Laser-Driven Shock Wave-Induced Triboluminescence of an Organic Crystal: Toward a Semiquantitative Study

2003

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A novel technique for studying triboluminescence (TL) of organic crystals is proposed. N-Isopropylcarbazole (NIPCz) crystals were fixed onto a glass plate, whose reverse side was coated with a black pigment that was used as a shock-generating layer. A single fundamental pulse from a Nd 3+ :YAG laser (1064 nm, fwhm ∼ 10 ns) was irradiated onto the shock-generating layer to generate a shock wave, and this resulted in both crystal fracture and TL from the NIPCz crystals. The TL spectrum was almost the same as the fluorescence spectrum of the NIPCz crystals. The dynamic behavior of the crystal fracture and the transient intensity of the TL were shown to be interrelated with each other. The generation of the TL commenced 200 ns after the laser exposure, and this was reproducible irrespective of the NIPCz samples, indicating that the generation and detection timings for TL are controllable with high accuracy by the present technique. In addition, the TL intensity increased with increasing amplitude of the shock wave, as well as the laser fluence. The results presented here demonstrate that the present method provides novel means of investigating TL phenomena semiquantitatively in a noncontact mode.

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The emission of photons and the dynamics of submicrodefects on the surface of noble metals

Cited by 4 publications

References 2 publications

Laser power dependence of mechanoluminescence in metals

Laser power dependence of mechanoluminescence in metals

Luminescence of Triboplasma: Origin, Features, and Behavior

Laser-Driven Shock Wave-Induced Triboluminescence of an Organic Crystal: Toward a Semiquantitative Study

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