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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Multiphoton absorption"”.
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MULTIPHOTON ABSORPTION IN MONOLAYER TRANSITION METAL DICHALCOGENIDES
Identifying light absorption mechanisms in nanoscale materials, which are more efficient than those observed in bulk semiconductors, are of paramount importance to next-generation, infrared photo-detection. In this thesis, degenerate two-photon absorption (2PA) and three-photon absorption (3PA) …
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Photophysics of infrared multiphoton absorption by thiophosgene
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1983.
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Quantum light for quantum technologies
… for studying them. First, we will study the multiphoton absorption properties of maximally path entangled number (N00N) states. This is directly relevant to quantum lithography, and beating the Rayleigh diffraction limit. Next, we will develop a new scheme for quantum interferometry: dubbed …
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Functionalization of Surfaces Using Photolithography and Other Techniques
… in the form of arches, are created using multiphoton absorption polymerization. The creation of a patterned SAMs substrate with the potential application as a microarray was explored. Photolithography and soft lithography approaches were tested to create these amine-functionalized …
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Triphenylmethylium-Based Multitopic Two-Photon Absorbers: Synthesis and Characterization
… and more precisely their two-photon absorption (TPA) properties, make them attractive for the design of high technology materials (microfabrication, imaging, optical devices, etc). However, their multiphoton absorption properties and other related nonlinear optical (NLO) effects have …
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Triphenylmethylium-Based Multitopic Two-Photon Absorbers: Synthesis and Characterization
… and more precisely their two-photon absorption (TPA) properties, make them attractive for the design of high technology materials (microfabrication, imaging, optical devices, etc). However, their multiphoton absorption properties and other related nonlinear optical (NLO) effects have …
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Optical resistance of dielectric coatings to multi-pulse femtosecond laser radiation /
… observed at the wavelength where two-photon absorption changes to three-photon absorption. This confirms that multiphoton absorption is one of the main damage mechanisms in femtosecond range. The multilayer coatings deposited by IAD and e-beam techniques on substrates having roughness of 0.64 …
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Pulsed laser induced breakdown in solid state materials and air
… materials results from a combination of multiphoton absorption (MPA), tunneling and avalanche ionization. Aspects of these processes have been studied through measurements of the laser induced damage threshold (LIDT) and its dependence on pulse duration, polarization and wavelength. At …
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Intensyvių femtosekundinių šviesos bangų paketų sklidimo Kero terpėse laikinis ir erdvinis charakterizavimas /
… four-wave mixing) and nonlinear losses caused by multiphoton absorption. By means of imaging spectrometer technique it was shown that in the medium with normal group velocity dispersion the far-field angular spectrum of the wave packet takes a characteristic X shape, whereas in anomalous group …
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Two photon and two colour ionization of atoms in intense extreme-UV and optical laser fields
… synchrotrons. In addition, the study of multiphoton absorption by outer (valence) electrons rapidly followed the development of sufficiently intense optical and infrared laser systems. The advent of intense EUV and X-ray Free Electron Lasers (FELs), based on the principle of Self Amplifed …
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Synthesis, Characterizations, And Evaluation Of New Reactive Two-photon Absorbing Dyes For Two-photon Excited Fluorescence Imaging Applications
… of the novel imaging modality utilizing multiphoton absorption and its extraordinary contribution to recent advances in bioimaging. Intimately involved in the revolution of nonlinear bioimaging has been the development of optical probes for probing biological function and activity. The …
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On the phenomenon and potential applications of pulsed laser-reshaped silver nanoparticles embedded in soda-lime glass
… samples containing silver nanoparticles. Multiphoton Absorption Induced Luminescence (MAIL) was observed along with the SHG and characterised for the various laser polarisation components. The dependence of the aforementioned effects on the elongated nanoparticle aspect ratio was shown to …
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Materials and processes for the optical additive manufacturing of advanced organic/inorganic nanocomposites for the mask-less plating of insulator and semiconductor substrates, and microfluidic devices
… This technique exploits the optical, nonlinear multiphoton absorption process, and allows for the fabrication of 3D objects featuring details below the diffraction limit, down to 100 nm or even less. Here, this multi-photon absorption process is exploited to trigger the photo-reduction of the …
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Nonlinear optical properties of natural dyes based on optical resonance
… dyes remain essential for the large nonlinear absorption expressed in terms of nonlinear optical susceptibilities or other mechanism of absorption such as two photon absorption (TPA), reverse saturable absorption (RSA) or intensitydependent refractive index characteristic. In this thesis we …