Transmission studies of explosive vaporization of a transparent liquid film on an opaque solid surface induced by excimer-laser-pulsed irradiation

Leung, P. T.; Do, Nhan; Klees, L.; Leung, W. P.; Tong, F.; Lam, Lui; Zapka, Werner; Tam, A. C.

doi:10.1063/1.351619

Cited by 30 publications

(17 citation statements)

References 24 publications

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“…Furthermore i t is observed that Ithe pressure wave generated by the liquid explosion causes repetitive cavitations at the surface of the solid sample. t -25 1.50 Time [wl [12]. The same argument holds also for the reflectance signal: decrease.…”

Section: Strictionsmentioning

confidence: 52%

“…Due to the practical significance of this "s;team laser cleaning", many physical aspects such as nucleation dynamics, explosion tlmsholds for different Iiquids and substrates, and the pressures generated by the evaporation process need detailed investigation. Various methods including piezoelectric detection [ I I], optical transmission probe [12,13], and probe-beam deflection [I41 have been applied previously to the studies of these phenomena with some experimental re-…”

Section: Pacs: 6470fx 7920d~mentioning

confidence: 99%

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Optical and acoustic study of nucleation and growth of bubbles at a liquid-solid interface induced by nanosecond-pulsed-laser heating

et al. 1994

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Abstract. The dynamics of liquid-vapor phase-change in the nanosecond time-scale induced by pulsed-laser heating of a liquid on a solid sample is studied by means of optical reflectance and scattering measurements, and the piezoelectric detection technique. The Iiquids studied include water, ethanol, merhanol, EsopmPmpyl Alcohol P A ) , and mixtures of water and IPA. Here, we present, in addition to the optical, reflectance and scartering monitoring, the simultaneous application of the piezoelectric transducer measurements to the study of nucleation dynamics and explosive vaporization of various liquids on an opaque soIid sample that is flash heated by a short laser pulse. h an analogy 10 the reflectance signal, it is also observed &at the transient acoustic signal exhibits a threshold behavior which confirms bubble nucleation. Furthermore i t is observed that Ithe pressure wave generated by the liquid explosion causes repetitive cavitations at the surface of the solid sample.

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Section: Strictionsmentioning

confidence: 52%

Section: Pacs: 6470fx 7920d~mentioning

confidence: 99%

Optical and acoustic study of nucleation and growth of bubbles at a liquid-solid interface induced by nanosecond-pulsed-laser heating

et al. 1994

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“…'6"1 6 This method has been successfully applied to our studies on the nucleation dynamics of the explosive evaporation of liquid films on a-Si samples irradiated by UV laser pulses and provided useful data. 16,17 In a previous paper' 4 we pointed out that a larger temperature dependence of the optical constants for a-Si is possible in the stronger absorption regime. Therefore we extend here the investigations to shorter wavelengths, especially to the He-Ne laser wavelength.…”

mentioning

confidence: 92%

Temperature dependence of optical properties for amorphous silicon at wavelengths of 6328 and 752 nm

Yavaş

Tam

et al. 1993

Opt. Lett.

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The temperature dependence of the optical properties for amorphous silicon is studied at wavelengths of 632.8 and 752 nm. Both the refractive index and extinction coefficient increase linearly with temperature for 752 nm, while the refractive index decreases and the extinction coefficient increases for 632.8 nm. The rate of increase of the extinction coefficient at 632.8 nm is twice as much as that for 752 nm.The temperature dependence of the optical properties of solids, especially crystalline silicon (c-Si), has been the focus of many studies.`-3 This interest is partly motivated by the desire for better understanding of the laser-material interaction, such as laser annealing 4 and laser-induced explosive evaporation of liquid films. 5 Numerical simulations of laser annealing fit well to experimental observations, 6 ' 7 but it is often concluded that the temperature dependence of the optical properties of the material must be taken into account in order to achieve better agreement with experiments. 8 9 Amorphous silicon (a-Si), however, is less studied in this aspect. Although a great deal of room-temperature data are available,' 0 only a few reports have been made on the studies of the temperature dependence of its optical constants at the Nd:YAG wavelength (1064 nm), which indicated almost no temperature dependence. 1 1 -' 3 Thus the optical constants for a-Si have been considered as constant with temperature. However, we reported recently that this assumption is not true at the wavelength of 752 nm.' 4 At this wavelength with stronger optical absorption, we observed a significant increase of the optical constants for a-Si with temperature. Based on this observation we developed a new technique for the transient measurements of the temperature profile in thin a-Si films on fused-quartz substrates using the optical transmission probe at 752 nm.'6"1 6 This method has been successfully applied to our studies on the nucleation dynamics of the explosive evaporation of liquid films on a-Si samples irradiated by UV laser pulses and provided useful data. 16,17In a previous paper' 4 we pointed out that a larger temperature dependence of the optical constants for a-Si is possible in the stronger absorption regime. Therefore we extend here the investigations to shorter wavelengths, especially to the He-Ne laser wavelength. This is also of practical importance, since the He-Ne laser is the most widely available and the most commonly used laser for optical probing. Here we present the results of our comparative study at the wavelengths of 632.8 and 752 nm. The temperature range of the measurements here is also broader compared with that in our previous research.' 4 As we expected, we observe a significant temperature dependence for n(T) and k(T) for a-Si also at the He-Ne laser wavelength.The a-Si samples for our experiment are 0.2 /.tm thick and prepared in the same way as previously reported' 4 by e-beam evaporation of c-Si in vacuum (10-v Torr) onto fused-quartz substrates (250 /um thick). The substrate temperature...

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“…Initial studies had been performed on thin liquid films by using an optical transmission probe [14], which provides useful information on temperature transients and "explosion" thresholds. However, liquid film rupture and droplet formation in the path of the probe beam make data analysis difficult and, in addition, the optical transmission probe is limited to certain semitransparent solid substrates.…”

mentioning

confidence: 99%

Bubble nucleation and pressure generation during laser cleaning of surfaces

Yavaş¹,

Schilling²,

Bischof³

et al. 1997

Applied Physics A: Materials Science & Processing

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Abstract. Bubble nucleation and growth dynamics, on a nanosecond time scale, induced by pulsed laser heating of a liquid-solid interface are studied experimentally. A surface-plasmon probe is implemented as a novel, highly sensitive method for the study of submicroscopic bubbles, providing accurate information on the nucleation thresholds, growth velocities, and transient pressure generation by rapid bubble growth. Owing to the higher sensitivity of the surface plasmon probe to small bubbles, it is demonstrated that bubble nucleation sets in at a lower liquid superheating than previously determined with the use of optical reflectance or piezoelectric transducer measurements. A comparison of experimentally determined bubble growth velocities with computational results confirms that bubble growth is governed by the heat transfer from the solid surface into the liquid. Reconstructed surface plasmon resonance curves from transient signals are used to estimate the fractional volume and number density of bubbles in the superheated liquid layer. Further, a surface plasmon probe is utilized for the absolute measurement of bubble-growthinduced pressure amplitudes on a nanosecond time scale. The measurements yield peak pressure amplitudes in the range of ∼ 1-5 MPa with a pressure pulse width of ∼ 40 ns. Additionally, the phase of an acoustic pulse is observed to change upon reflection at the liquid-solid interface if bubbles are present, providing a direct proof for laser-induced bubbles.

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Transmission studies of explosive vaporization of a transparent liquid film on an opaque solid surface induced by excimer-laser-pulsed irradiation

Cited by 30 publications

References 24 publications

Optical and acoustic study of nucleation and growth of bubbles at a liquid-solid interface induced by nanosecond-pulsed-laser heating

Optical and acoustic study of nucleation and growth of bubbles at a liquid-solid interface induced by nanosecond-pulsed-laser heating

Temperature dependence of optical properties for amorphous silicon at wavelengths of 6328 and 752 nm

Bubble nucleation and pressure generation during laser cleaning of surfaces

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