Molecular Desorption by Laser–Driven Acoustic Waves: Analytical Applications and Physical Mechanisms

Zinovev, A. V.; Veryovkin, I. V.; Pellin, Michael J.

doi:10.5772/18061

Cited by 5 publications

(5 citation statements)

References 59 publications

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“…Green light from a frequency-doubled Nd:YAG laser (Innolas, 532 nm, 15 mJ, 4 ns) is directed onto the back side of a 500-μm thick and chemically cleaned silicon wafer (111 cut), which is attached to a quartz plate and suspended in high vacuum (<1 × 10 −8 mbar). The origin of this method is similar to that of laser-induced acoustic desorption 31 32 with the difference that laser-induced acoustic desorption experiments are targeted at releasing surface adsorbents. Here we release nanomaterial from the pristine silicon surface itself by stress.…”

Section: Methodsmentioning

confidence: 99%

Cavity cooling of free silicon nanoparticles in high vacuum

et al. 2013

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Laser cooling has given a boost to atomic physics throughout the last 30 years, as it allows one to prepare atoms in motional states, which can only be described by quantum mechanics. Most methods rely, however, on a near-resonant and cyclic coupling between laser light and well-defined internal states, which has remained a challenge for mesoscopic particles. An external cavity may compensate for the lack of internal cycling transitions in dielectric objects and it may provide assistance in the cooling of their centre-of-mass state. Here we demonstrate cavity cooling of the transverse kinetic energy of silicon nanoparticles freely propagating in high vacuum (<10−8 mbar). We create and launch them with longitudinal velocities down to v≤1 m s−1 using laser-induced ablation of a pristine silicon wafer. Their interaction with the light of a high-finesse infrared cavity reduces their transverse kinetic energy by up to a factor of 30.

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Section: Methodsmentioning

confidence: 99%

Cavity cooling of free silicon nanoparticles in high vacuum

et al. 2013

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“…A number of matrix-free optical methods are conceivable and currently being explored in several laboratories. This includes laser-induced acoustic desorption, LIAD [101], laserinduced forward transfer, LIFT [102], or matrix-free LD [103]. They are all compatible with a high-vacuum environment.…”

Section: Effusive Beam Sourcesmentioning

confidence: 99%

Experimental methods of molecular matter-wave optics

Juffmann¹,

Ulbricht²,

Arndt³

2013

Rep. Prog. Phys.

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We describe the state of the art in preparing, manipulating and detecting coherent molecular matter. We focus on experimental methods for handling the quantum motion of compound systems from diatomic molecules to clusters or biomolecules.Molecular quantum optics offers many challenges and innovative prospects: already the combination of two atoms into one molecule takes several well-established methods from atomic physics, such as for instance laser cooling, to their limits. The enormous internal complexity that arises when hundreds or thousands of atoms are bound in a single organic molecule, cluster or nanocrystal provides a richness that can only be tackled by combining methods from atomic physics, chemistry, cluster physics, nanotechnology and the life sciences.We review various molecular beam sources and their suitability for matter-wave experiments. We discuss numerous molecular detection schemes and give an overview over diffraction and interference experiments that have already been performed with molecules or clusters.Applications of de Broglie studies with composite systems range from fundamental tests of physics up to quantum-enhanced metrology in physical chemistry, biophysics and the surface sciences.Nanoparticle quantum optics is a growing field, which will intrigue researchers still for many years to come. This review can, therefore, only be a snapshot of a very dynamical process.

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“…This seems to be supported by observations that the liberated molecules are quite hot [63] and for the most part only desorption of relatively stable molecules has appeared in the literature. Zinovev et al [113] conclude that LIAD is actually a misnomer and desorption is most likely due to the thermal and mechanical stresses between the sample and foil.…”

Section: Vaporization/desorption Methodsmentioning

confidence: 99%

Charge migration induced by attosecond pulses in bio-relevant molecules

Calegari

Trabattoni

Palacios

et al. 2016

J. Phys. B: At. Mol. Opt. Phys.

101

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After sudden ionization of a large molecule, the positive charge can migrate throughout the system on a sub-femtosecond time scale, purely guided by electronic coherences. The possibility to actively explore the role of the electron dynamics in the photo-chemistry of bio-relevant molecules is of fundamental interest for understanding, and perhaps ultimately controlling, the processes leading to damage, mutation and, more generally, to the alteration of the biological functions of the macromolecule. Attosecond laser sources can provide the extreme time resolution required to follow this ultrafast charge flow. In this review we will present recent advances in attosecond molecular science: after a brief description of the results obtained for small molecules, recent experimental and theoretical findings on charge migration in bio-relevant molecules will be discussed.

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Molecular Desorption by Laser–Driven Acoustic Waves: Analytical Applications and Physical Mechanisms

Cited by 5 publications

References 59 publications

Cavity cooling of free silicon nanoparticles in high vacuum

Cavity cooling of free silicon nanoparticles in high vacuum

Experimental methods of molecular matter-wave optics

Charge migration induced by attosecond pulses in bio-relevant molecules

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