Výsledky vyhledávání - "Arnold Guerra"

Quasi-electron and phonon interactions in the femtosecond time domain

Autor: Walter E. Bron, Carlos G. Suarez, Arnold Guerra

Publikováno v: Journal of Luminescence. :518-525

The properties of optically excited particles in ultra thin metallic films differ markedly between the femto, and the picosecond time domain. In the specific case of Au films, the difference arises from the lack of thermal equilibrium in the femtosec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a7e9fd8c5c847fc9d388efc95057787a
https://doi.org/10.1016/s0022-2313(97)00162-2

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Optoacoustic imaging using interferometric measurement of surface displacement

Autor: Samuel Q. Duque, Vasan Venugopalan, Stefan A. Carp, Arnold Guerra

Publikováno v: Applied Physics Letters. 85:5772-5774

We describe an optoacoustic imaging technique based on time-resolved measurements of laser-induced thermoelastic expansion. Tomographic images of tissue phantoms are formed using such measurements made at several locations following irradiation with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ff5600aa9c38df3b24a5ad8e840bb0b5
https://doi.org/10.1063/1.1831569

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Investigation of laser-induced cell lysis using time-resolved imaging

Autor: Arnold Guerra, Vasan Venugopalan, Kaustubh R. Rau, Alfred Vogel

Publikováno v: Rau, KR; Guerra, A; Vogel, A; & Venugopalan, V. (2004). Investigation of laser-induced cell lysis using time-resolved imaging. Applied Physics Letters, 84(15), 2940-2942. doi: 10.1063/1.1705728. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/7ns8r70n

Using time-resolved imaging, we investigated the lysis of confluent PtK2 cell cultures by pulsed laser microbeam irradiation. Images obtained at time delays of 0.5 ns to 50 μs demonstrate lysis to be mediated by laser-induced plasma formation result

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9af0d8d130f90cf7549388635ab839f3
https://doi.org/10.1063/1.1705728

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Examination of laser-induced cell lysis by time resolved imaging

Autor: Kaustubh R. Rau, Arnold Guerra, Alfred Vogel, Vasan Venugopalan

Publikováno v: Rau, KR; Guerra, A; Vogel, A; & Venugopalan, V. (2004). Examination of laser-induced cell lysis by time resolved imaging. Proceedings of SPIE-The International Society for Optical Engineering, 5322, 168-174. doi: 10.1117/12.529622. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/329923cz

Highly focused laser microbeams are being used with increasing regularity for targeted cell lysis, cellular microsurgery and molecular delivery via transient cell membrane permeabilization. To examine the mechanisms of laser induced cell lysis, we pe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eeabca4248318ec19c8dedd7f81e9040
https://doi.org/10.1117/12.529622

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Optoacoustic imaging via the interferometric measurement of surface displacement

Autor: Samuel Q. Duque, Vasan Venugopalan, Arnold Guerra, Stefan A. Carp

Publikováno v: Frontiers in Optics 2004/Laser Science XXII/Diffractive Optics and Micro-Optics/Optical Fabrication and Testing.

A modified Mach Zehnder interferometer system has been developed to measure surface motion with 4 ns temporal resolution and 0.2 nm displacement sensitivity. We discuss its use to measure the optical properties of homogeneous turbid media and image h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a1ba77712c4be012a44ddc7aefe95758
https://doi.org/10.1364/fio.2004.fwm4

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Role of laser-induced plasma formation in pulsed cellular microsurgery and micromanipulation

Autor: Vasan Venugopalan, Alfred Vogel, Arnold Guerra, Kester Nahen

Publikováno v: Physical review letters. 88(7)

We investigate experimentally the physical processes underlying pulsed cellular microsurgery and micromanipulation using nanosecond 532- and 1064-nm laser pulses focused at high numerical aperture. We find that the laser parameters employed for many

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0402f4963c97d4f63a98634731487a12
https://pubmed.ncbi.nlm.nih.gov/11863944

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Experimental investigation of optical breakdown using nanosecond 532-nm and 1064-nm laser pulses delivered at high numerical aperture

Autor: Arnold Guerra, Kester Nahen, Vasan Venugopalan, Alfred Vogel

Publikováno v: SPIE Proceedings.

We have conducted time-resolved studies of optical breakdown produced by the irradiation of water using 6 ns Nd:YAG laser pulses of 1064 nm and 532 nm wavelength focused at a numerical aperture of NA=0.9. We determined pulse energy threshold values f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db3d134cd7a859e04ccb8c7c51b7816a
https://doi.org/10.1117/12.426778

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Imaging through quasi-particle transport

Autor: Walter E. Bron, Arnold Guerra, Carlos G. Suarez

Publikováno v: Optics Letters. 21:997

Quasi-particles travel down a one-dimensional concentration gradient in a thin metallic film composed of regions of only gold and regions of gold-titanium-gold multilayers. We obtain an image depending on whether the quasi-particles encounter a multi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97dd61933498824e2dafd541dc649227
https://doi.org/10.1364/ol.21.000997

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Akademický článek

"Multilingualizing" Composition: A Diary Self-Study of Learning Spanish and Chinese.

Autor: Severino, Carol

Publikováno v: Composition Studies. Fall2017, Vol. 45 Issue 2, p12-31. 20p.

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