Coupling of focused laser pulse to surfaces of transparent materials studied by time-resolved imaging technique

Tadano, J.; Kumakura, H.; Ito, Yoshiro

doi:10.1007/s00339-004-2621-2

Cited by 16 publications

(6 citation statements)

References 8 publications

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“…The entire cell system is positioned under a New Wave UP-213 laser (original ablation chamber removed) and connected to a Thermo Element 2 ICP-MS with Teflon tubing. Although ice is transparent to radiation at 213 nm (Warren and Brandt, 2008), the high power density of the laser pulse makes it possible to ablate transparent material (Tadano and others, 2004). The 213 nm wavelength is the fifth harmonic of a 1064 nm Nd:YAG laser.…”

Section: Methodsmentioning

confidence: 99%

New LA-ICP-MS cryocell and calibration technique for sub-millimeter analysis of ice cores

et al. 2015

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ABSTRACT. Ice cores provide a robust reconstruction of past climate. However, development of timescales by annual-layer counting, essential to detailed climate reconstruction and interpretation, on ice cores collected at low-accumulation sites or in regions of compressed ice, is problematic due to closely spaced layers. Ice-core analysis by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) provides sub-millimeter-scale sampling resolution (on the order of 100 µm in this study) and the low detection limits (ng L -1 ) necessary to measure the chemical constituents preserved in ice cores. We present a newly developed cryocell that can hold a 1 m long section of ice core, and an alternative strategy for calibration. Using ice-core samples from central Greenland, we demonstrate the repeatability of multiple ablation passes, highlight the improved sampling resolution, verify the calibration technique and identify annual layers in the chemical profile in a deep section of an ice core where annual layers have not previously been identified using chemistry. In addition, using sections of cores from the Swiss/Italian Alps we illustrate the relationship between Ca, Na and Fe and particle concentration and conductivity, and validate the LA-ICP-MS Ca profile through a direct comparison with continuous flow analysis results.

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Section: Methodsmentioning

confidence: 99%

New LA-ICP-MS cryocell and calibration technique for sub-millimeter analysis of ice cores

et al. 2015

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“…На формування плазми, в свою чергу, істотно впливає структура та властивості поверхневого шару мішені. Факторами, що можуть впливати на розвинення про-цесу можуть бути гладкість або шорсткість поверхні [9], порува-тість [2], поглинальна здатність речовини. Не зважаючи на велику кількість експериментальних робіт у цій області, фізика процесів, що відбуваються при опромінюванні ре-човини, залишається незрозумілою [3].…”

Section: висновкиunclassified

Shapes of Washing of a Solid under Action of Pulsed Laser Radiation

Породько

Demchyshyn

2011

Usp. Fiz. Met.

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* Київський національний університет імені Тараса Шевченка, фізичний факультет, кафедра фізики металів, просп. Акад. Глушкова, 4, 03187, Київ, Україна Розглянуто уявлення про взаємодію інтенсивних імпульсних потоків сві-тлової енергії з поверхнею речовини, в тому числі з руйнуванням поверх-ні. Задача полягає в прогнозуванні критичних параметрів впливу лазер-ного випромінювання на властивості приповерхневих твердих матеріялів (модифікація поверхні, топлення, випарування, зварювання, різання та ін.), що працюють в широкому діапазоні, -від низькоенергетичних та тривалих до високоенергетичних та коротких, -радіаційної дії.Considered the idea of the interaction of intensive impulsive streams of light energy with the surface of substance including with destruction of surface. A task consists in prognostication of critical parameters of influence of laser radiation on property of solid materials materials (modification of surface, drown, evaporation, welding, cutting and other) that work in a wide range, from low energy and protracted to high energy and short, radiation action.Рассмотрены представления о взаимодействии интенсивных импульсных потоков световой энергии с поверхностью вещества, в том числе с разру-шением поверхности. Задача заключается в прогнозировании критиче-ских параметров воздействия лазерного излучения на свойства припо-верхностных твердых материалов (модификация поверхности, плавле-ния, испарения, сварки, резки и др.), которые работают в широком диа-пазоне, -от низкоэнергетических и длительных до высокоэнергетиче-ских и коротких, -радиационного воздействия.Ключові слова: низькоенергетичні та високоенергетичні, імпульси фем-тосекундної тривалости, наносекундний імпульс, кратери.

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“…The imaging systems which we used were custom-made pump-and-probe systems with a few variations of optical elements as well as combinations of pump and probe lasers [5][6][7][8][9][10][11][12][13][14][15][16][17] . The pump laser was the regenerative Ti:Sapphire laser, Bright.…”

Section: Dynamical Observation Of the Machining Processmentioning

confidence: 99%

Fabrication of OLED display by an ultrashort laser: selective patterning of thin metal electrode

et al. 2007

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Organic light emitting diode (OLED) is now in practical use and also a subject of active research and development. In industrial production of OLED displays, one of the key technologies is patterning of electrodes, especially a metal cathode, which is usually made on a thin layer of organic electro-luminescence (OEL) compounds. Difficulties in machining of the OLED come from the fact that the OLED has multi-layered structures consisted from very thin layers of different materials, one of which is a highly heat-and chemical-sensitive organic material. The typical OLED sample has indium tin oxide (ITO) electrode of about 150 nm thick at the bottom. The organic electro-luminescence material of less than 200 nm is deposited on it and the top is aluminum electrode of 100 to 150 nm thickness. We have constructed a fabrication system of the OLED by using an ultrashort fiber laser in the patterning of aluminum electrode and fabricated a display panel successfully. The system has several advantages comparing to other methods currently used. To investigate the process in detail, we have constructed two ultra-fast photography systems, with either subpicoseconds or nanoseconds time resolution, and carried out the time-resolved observation of the process. It is found that the underlying layer affects much to the machinability of the top metal layer. The ITO layer seems to enhance the machining efficiencies of the aluminum electrode: the ablated spot size becomes larger for that on ITO, even though the laser pulse energy is kept constant.

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Coupling of focused laser pulse to surfaces of transparent materials studied by time-resolved imaging technique

Cited by 16 publications

References 8 publications

New LA-ICP-MS cryocell and calibration technique for sub-millimeter analysis of ice cores

New LA-ICP-MS cryocell and calibration technique for sub-millimeter analysis of ice cores

Shapes of Washing of a Solid under Action of Pulsed Laser Radiation

Fabrication of OLED display by an ultrashort laser: selective patterning of thin metal electrode

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