Rozprawy doktorskie na temat „Optical and near-Infrared”
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Houston, Jessica Perea. "Near infrared optical lymphography for cancer diagnostics". Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/4807.
Pełny tekst źródłaLan, Zhaojue. "Spectral tunable organic near-infrared photodetectors". HKBU Institutional Repository, 2020. https://repository.hkbu.edu.hk/etd_oa/771.
Pełny tekst źródłaHiggs, Tim D. "Optical and near infrared properties of massive galaxies". Thesis, University of Portsmouth, 2014. https://researchportal.port.ac.uk/portal/en/theses/optical-and-near-infrared-properties-of-massive-galaxies(de9bfef2-67bd-45f1-bd7d-d54e08566237).html.
Pełny tekst źródłaPietka-Eddleston, Magdalena. "Optical And Near Infrared Studies of Cluster Galaxies". Thesis, University of Nottingham, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.523662.
Pełny tekst źródłaBlack, Leo-Jay. "Near-infrared nano-optical elements using plasmonic nanoantennas". Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/410269/.
Pełny tekst źródłaRosvick, Joanne Marie. "Optical and near-infrared photometry of old galactic clusters". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21945.pdf.
Pełny tekst źródłaWolters, Stephen D. "Thermal infrared and optical observations of near-Earth asteroids". Thesis, Open University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437781.
Pełny tekst źródłaRichardson, Mark. "Errors in predicting snow's near-infrared optical grain size". Thesis, University of Reading, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.625443.
Pełny tekst źródłaLamour, Tobias Paul. "High pulse energy near-infrared ultrafast optical parametric oscillators". Thesis, Heriot-Watt University, 2011. http://hdl.handle.net/10399/2509.
Pełny tekst źródłaMachado, Ana Cristina Moreira. "Optical and near-infrared surveys in star forming regions". Universidade Federal de Minas Gerais, 2005. http://hdl.handle.net/1843/ESCZ-6L6H6C.
Pełny tekst źródłaAlgumas regiões de formação estelar com características bem diferentes foram medidas em observatórios localizados em alguns dos melhores sítios do mundo: duas missões no Kitt Peak National Observatory no Arizona, Estados Unidos, usando os telescópios de 4m e de 0,9m, e outras duas missões no observatório de Mauna Kea no Havaí, com o telescópio óptico de 2.2m e o telescópio infravermelho de 4m (UKIRT). Obtivemos dados de ótima qualidade, imagens com alta resolução, longo tempo de exposição, com seeing da ordem de 1 ou menos, aliados a grandes campos de visão, com objetivo de obter o maior número possível de informações para cada região. Para procurar por estrelas jovens, porém já mais evoluídas (opticamente visíveis), analisamos buscas feitas por estrelas com emissão em H_ em duas regiões de formação estelar bem conhecidas: NGC 2264 e M 42. As buscas foram feitas usando-se um telescópio Schmidt, com grande campo de visão, associado a filmes fotográficos da melhor qualidade, fornecendo uma pesquisa que cobre uma área de 5×5 no céu e sensibilidade suficiente para alcançar limites de magnitudes no vermelho de até 19 mag, resultando na detecção de um número superior de estrelas do que previamente conhecido. Apresentamos tabelas, cartas de identificação, correlação com levantamentos prévios e magnitudes obtidas em catálogos públicos. Apresentamos também buscas por objetos Herbig-Haro usando imagens ópticas de banda estreita, nas regiões de S140 e L1551. Nesta última, imagens obtidas anteriormente permitiram a determinação de movimentos próprios usando uma técnica de correlação cruzada. Um moderno CCD MOSAIC forneceu uma visão em grande escala de toda a região, bem como resolução (0.26/pix) para se detectar detalhes na estrutura dos nós dentro das regiões de choque. Novos objetos Herbig-Haro foram detectados. Discutimos um possível alinhamento do eixo principal dos jatos com o campo magnético da nuvem. A mesma técnica de correlação foi usada para se medir movimentos próprios no bastante conhecido HH 47, com imagens de resolução ainda maior (0.1/pix) obtidas pelo Hubble Space Telescope em duas épocas distintas. Algumas outras regiões de formação estelar foram pesquisadas em comprimentos de onda no visível e no infravermelho próximo, para um estudo tanto das fontes jovens quanto dos objetos Herbig-Haro, numa tentativa de relacioná-los e melhorar o entendimento dos processos de formação estelar nessas áreas. Duas das regiões observadas são apresentadas neste trabalho: a nuvem globular IC 1396N e uma região chamada por nós de Golfo do México, por sua localização na nuvem escura a sudoeste da Nebulosa América do Norte. As imagens ópticas foram obtidas em condições perfeitas em um dos melhores sítios de observação no mundo (o observatório de Mauna Kea, no Havaí). A região pesquisada tinha tamanho de apenas alguns minutos de arco, mas a resolução foi ótima e as áreas cobrem a região principal onde os processos de formação estão acontecendo. Muitos objetos Herbig-Haro novos foram descobertos, bem como novas estrelas com linhas de emissão em H_ As observações no infravermelho permitem uma visão do interior da nuvem molecular, detectando estrelas jovens embebidas, bem como ejeções de matéria. Em alguns casos, as observações no infravermelho não possuem a mesma qualidade, necessária para se construir uma visão compreensível das fontes jovens, e não pudemos determinar propriedades físicas para estas estrelas. Mas fomos capazes de detectar estrelas até então desconhecidas, algumas delas criando jatos de vários tipos. Até agora sete regiões diferentes foram estudadas com uso de técnicas variadas, para as quais discutimos as diferenças e similaridades. Algumas outras regiões também foram observadas e seu estudo está planejado para breve. Concluímos, através de nosso estudo, que o processo de formação estelar é bem mais complexo do que se acreditava há poucos anos, e que somente o uso de várias técnicas aplicadas a diversas regiões de formação estelar poderá responder às inúmeras questões ainda sem resposta sobre este processo (e provavelmente colocar muitas outras questões . . . ).
Lee, Hanshin. "Optical Alignment and Novel Instrumentation Techniques for Optical and Near-Infrared Astronomy". Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504421.
Pełny tekst źródłaLi, Ning. "Charge carrier manipulation for high performing near-infrared light detection". HKBU Institutional Repository, 2018. https://repository.hkbu.edu.hk/etd_oa/538.
Pełny tekst źródłaJohnston, Ian Ronald. "Near-infrared photodetectors and optical interconnects fabricated monolithically on silicon". Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241870.
Pełny tekst źródłaIkpe, Stanley A. Triplett Gregory Edward. "Atmospheric effects on near-infrared free space optical communication links". Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6654.
Pełny tekst źródłaBuchanan, Bruce Randall. "Compatability of optical-fiber measurements with near-infrared and visible analysis /". Thesis, Connect to this title online; UW restricted, 1987. http://hdl.handle.net/1773/11591.
Pełny tekst źródłaWang, Tsuei-Lian. "High-Power Optically Pumped Semiconductor Lasers for Near Infrared Wavelengths". Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/242398.
Pełny tekst źródłaPanthani, Matthew George. "Colloidal Nanocrystals with Near-infrared Optical Properties| Synthesis, Characterization, and Applications". Thesis, The University of Texas at Austin, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3572875.
Pełny tekst źródłaColloidal nanocrystals with optical properties in the near-infrared (NIR) are of interest for many applications such as photovoltaic (PV) energy conversion, bioimaging, and therapeutics. For PVs and other electronic devices, challenges in using colloidal nanomaterials often deal with the surfaces. Because of the high surface-to-volume ratio of small nanocrystals, surfaces and interfaces play an enhanced role in the properties of nanocrystal films and devices.
Organic ligand-capped CuInSe2 (CIS) and Cu(InXGa 1-X)Se2 (CIGS) nanocrystals were synthesized and used as the absorber layer in prototype solar cells. By fabricating devices from spray-coated CuInSe nanocrystals under ambient conditions, solar-to-electric power conversion efficiencies as high as 3.1% were achieved. Many treatments of the nanocrystal films were explored. Although some treatments increased the conductivity of the nanocrystal films, the best devices were from untreated CIS films. By modifying the reaction chemistry, quantum-confined CuInSe XS2-X (CISS) nanocrystals were produced. The potential of the CISS nanocrystals for targeted bioimaging was demonstrated via oral delivery to mice and imaging of nanocrystal fluorescence.
The size-dependent photoluminescence of Si nanocrystals was measured. Si nanocrystals supported on graphene were characterized by conventional transmission electron microscopy and spherical aberration (Cs)-corrected scanning transmission electron microscopy (STEM). Enhanced imaging contrast and resolution was achieved by using Cs-corrected STEM with a graphene support. In addition, clear imaging of defects and the organic-inorganic interface was enabled by utilizing this technique.
Quartel, John Conrad. "A study of near-field optical imaging using an infrared microscope". Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313413.
Pełny tekst źródłaCheng, Ran. "NONINVASIVE NEAR-INFRARED DIFFUSE OPTICAL MONITORING OF CEREBRAL HEMODYNAMICS AND AUTOREGULATION". UKnowledge, 2013. http://uknowledge.uky.edu/cbme_etds/9.
Pełny tekst źródłaLi, Hongxia. "Characteristic and sensing properties of near- and mid-Infrared optical fibres". Thesis, Heriot-Watt University, 2009. http://hdl.handle.net/10399/2305.
Pełny tekst źródłaDavis, R. Wesley. "A digital communication system using near infrared radiation transmitted through the atmosphere : presented". Scholarly Commons, 1993. https://scholarlycommons.pacific.edu/uop_etds/2253.
Pełny tekst źródłaZhao, Jun. "Fast optical signal detected in the prefrontal lobe with near-infrared spectroscopy during sleep". Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4237.
Pełny tekst źródłaThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (January 11, 2007) Includes bibliographical references.
Samanta, Goutam Kumar. "High-power, continuous-wave optical parametric oscillators from visible to near-infrared". Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/29963.
Pełny tekst źródłaEsta tesis presenta el desarrollo de una nueva clase de osciladores ópticos paramétricos (OPOs) de onda continua (cw) y alta potencia con extendida sintonización desde el visible al infrarrojo (IR) cercano. A pesar de que los láseres están en uso desde hace casi 50 años, todavía es difícil desarrollar sistemas láser que puedan cubrir muchas regiones del espectro óptico en los rangos de longitud de onda desde el ultravioleta (UV) y visible hasta el infrarrojo cercano y medio, con potenciales aplicaciones en campos como la espectroscopia, sensores remotos, detección de trazas de gases, entre muchas otras. El desarrollo de cw OPOs en configuraciones de oscilador simplemente resonante (SRO), objetivo principal de esta tesis, es un gran desafío debido al alto umbral de potencia de bombeo (varios watts). Además, cuando se emplea bombeo visible, los efectos fotorrefractivo y de lente térmica adquieren especial relevancia y son difíciles de superar. Por lo tanto, la realización de cw SROs prácticos requiere de un óptimo diseño de cavidad, adecuados materiales no lineales y láseres de alta potencia con excelente calidad tanto espectral como espacial. Se han desarrollado cw SROs de alta potencia y frecuencia única basados en cristales de LiTaO3 de 30 mm de longitud, de crecido estequiométrico, con dopado de MgO y periódicamente pulidos (MgO:sPPLT). Los osciladores fueron bombeados en el verde mediante el láser de cw Nd:YVO4 bombeado por diodos y doblado en frecuencia. Utilizando un único periodo de red de 7.97 m, se ha obtenido cobertura continua de los campos señal y pivote en el rango 848-1430 nm por sintonización de temperatura entre 52ºC y 248ºC. Empleando una configuración de cavidad lineal y bombeo de doble paso, se ha logrado un umbral de oscilación de 2.88 W y se han generado potencias superiores a 1.51 W para el campo pivote en simple paso dentro del rango 1104-1430 nm para 6 W de potencia de bombeo, eficiencia de extracción del 25.2% y eficiencia de conversión de fotón del 56.7%. Con el objetivo de operar el cw SRO en frecuencia única a través del rango 848-1430 nm, hemos utilizado una configuración compacta de cavidad en anillo junto a un elemento para la selección de frecuencia (etalon). Utilizando el mismo cristal de MgO:sPPLT, se ha obtenido un umbral de oscilación del SRO de 2.84 W y se han generado potencias superiores a 1.59 W para el campo pivote en paso único dentro del rango 1104-1430 nm con una eficiencia máxima de extracción del 25.2 % y agotamiento del bombeo tan alto como el 67%. La salida del campo pivote en frecuencia única tiene un ancho de línea de ~ 7 MHz. Bajo condiciones de sistema libre y en ausencia de aislamiento térmico, la potencia del campo pivote exhibe estabilidad de pico a pico de 16% durante 5 horas. A pesar de que el cw SRO puede proveer radiación óptica en el rango 848-1430 nm, la alta potencia de salida solo se consiguió obtener en el rango 1104-1430 nm a causa de la alta reflectividad de los espejos de la cavidad para operar en SRO. Utilizando un acoplamiento de salida finito de la onda resonante, hemos extendido la disponibilidad de prácticas potencias de salida a través de todo el rango de sintonía. El cw SRO con acoplador de salida (OC-SRO) puede entregar un apotencia total de hasta 3.6 W con una eficiencia de extracción del 40% y con un ancho de línea de 3 MHz en el rango 848-1430 nm. La potencia del campo señal muestra fluctuaciones en potencia de pico a pico <10.7% durante 40 minutos y modo espacial TEM00 con M2<1.52. En ausencia de estabilización activa, el campo señal resonante exhibe una estabilidad en frecuencia natural a largo término con fluctuaciones <75 MHz durante 15 minutos, así como a corto término con fluctuaciones<10MHz durante 10 segundos, demostrando el potencial del sistema para aplicaciones en espectroscopia. Utilizando generación interna de segundo harmónico del campo señal resonante en el rango del infrarrojo cercano del MgO:sPPLT cw SRO mediante un cristal de BiB3O6 de 5 mm de longitud, hemos logrado generar 1.27 W de potencia cw y frecuencia única en el azul dentro del rango de sintonía 425-489 nm y con un ancho de línea de 8.5 MHz y un perfil espacial del haz de tipo Gaussiano. La estabilidad en frecuencia de la fuente azul es mejor que 280 MHz, donde la limitación viene impuesta por la resolución del medidor de longitud de onda empleado. Adicionalmente, hemos desarrollado fuentes verdes en cw en una sencilla configuración experimental de único paso, mediante el doblado en frecuencia de un láser de fibra con cristales de MgO:sPPLT y KTiOPO4 pulido periódicamente (PPKTP), generando hasta 9.6 W de radiación verde en modo espacial TEM00 (M2<1.33) con una eficiencia de paso único de 32.7% en MgO:sPPLT. Esta fuente verde has sido también empleada exitosamente para bombear cw SROs y será utilizada para bombear láseres de Ti:sapphire. Mediante esta fuente verde doblada en frecuencia, hemos demostrado que el cw OC-SRO proporciona una salida estable en frecuencia única con potencia de hasta 2 W a través del rango de sintonía 855-1408 nm, con estabilidad en potencia de pico a pico <11.7%, estabilidad en frecuencia <10 MHZ durante 10 segundos y modo espacial TEM00 (M2<1.26).
Gurfinkel, Mikhail. "Cancer diagnostics using dynamic near-infrared optical imaging and fluorescent contrast agents". Texas A&M University, 2005. http://hdl.handle.net/1969.1/3162.
Pełny tekst źródłaYoxall, Edward. "Applications of scattering-type scanning near-field optical microscopy in the infrared". Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/23637.
Pełny tekst źródłaReid, Derryck T. "Novel nonlinear techniques for femtosecond pulse generation in the visible and near-infrared". Thesis, University of St Andrews, 1995. http://hdl.handle.net/10023/14885.
Pełny tekst źródłaNorouzi, Neil. "Synthesis and application of novel near infrared cyanine dyes and optical imaging agents". Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/10002.
Pełny tekst źródłaKilpatrick, Charles D., Jennifer E. Andrews, Nathan Smith, Peter Milne, George H. Rieke, WeiKang Zheng i Alexei V. Filippenko. "An optical and near-infrared study of the Type Ia/IIn Supernova PS15si". OXFORD UNIV PRESS, 2016. http://hdl.handle.net/10150/622110.
Pełny tekst źródłaDavies, Christopher W. "Quantification of Optical Parameters Using Frequency Domain Functional Near-Infrared Spectroscopy (FD-fNIRS)". Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1559369168541587.
Pełny tekst źródłaFerreiro, Teresa I. "Development and characterisation of a near-infrared femtosecond optical parametric oscillator frequency comb". Thesis, Heriot-Watt University, 2013. http://hdl.handle.net/10399/2802.
Pełny tekst źródłaFakhri, Maryam. "Near-infrared optical frequency comb Vernier spectroscopy in air and in a flame". Thesis, Umeå universitet, Institutionen för fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-132520.
Pełny tekst źródłaDorfmüller, Jens. "Implementation of an Apertureless Scanning Near-Field Optical Microscope for the Infrared Spectrum". [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-50341.
Pełny tekst źródłaWang, Hao. "Near infrared autofluorescence augmentation of optical coherence tomography for diagnosis of coronary atherosclerosis". Thesis, Boston University, 2014. https://hdl.handle.net/2144/12941.
Pełny tekst źródłaCoronary artery disease accounts for nearly 50% of cardiovascular disease, the leading cause of death in the United States. The progression of atherosclerotic plaque is not yet fully understood. Histopathologic analysis of cadaver coronary plaques has suggested that certain subsets of coronary lesions, the vulnerable plaques, predispose patients to myocardial infarction. Prospective identification and treatment of vulnerable plaques has emerged as an important future goal for intravascular imaging and intervention. However, no single imaging modality has been shown to be capable of definitively identifying these lesions. Optical coherence tomography is a catheter-based imaging method that rapidly acquires three-dimensional images of coronary artery wall microstructure. While OCT has been documented to be capable of visualizing morphologic features associated with vulnerable plaques, it has not been shown to identify necrotic core or other putative chemicals/molecules associated with plaque progression and rupture. One solution is to add a secondary modality to OCT which detects molecules specific to necrotic cores. While conducting bench top spectroscopy measurements, our laboratory discovered that the intensity of near-infrared autofluorescence (NIRAF) is associated with plaque types. Using benchtop spectroscopy, this dissertation research established the relationship between the NIRAF signal intensity and spectral shape and atherosclerosis, and demonstrated its potential to differentiate necrotic core plaques from other arterial lesions. In addition to these spectroscopy-disease correlations, this thesis describes research conducted to identify the chemical/molecular origin of the NIRAF signal, using histopathology, confocal microscopy, spectroscopy, and chemical synthesis. The results indicate that protein modification in necrotic core is a potential mechanism for high NIRAF in advanced plaques. To translate OCT-NIRAF clinically, this dissertation describes the design of a double clad fiber that enables catheter-based detection of both OCT and NIRAF and a safety study to demonstrate that NIRAF excitation does not damage the artery wall. A preclinical OCT-NIRAF catheter was fabricated and used to image human coronary arteries ex vivo. These data showed that vulnerable plaques can potentially be identified using intracoronary OCT-NIRAF. The sum total of results from this thesis reseatch demonstrate the feasibility of conducting OCT-NIRAF imaging in human patients for the prospective identification ofvulnerable coronary plaques.
Ballerini, Paola. "Effects of starspots activity on optical and near infrared observations of planetary transits". Doctoral thesis, Università di Catania, 2013. http://hdl.handle.net/10761/1377.
Pełny tekst źródłaAydogdu, Selcuk. "Near Infrared Interference Filter Design And The Production Withion-assisted Deposition Techniques". Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614092/index.pdf.
Pełny tekst źródłaAlfeeli, Bassam. "Miniature gas sensing device based on near-infrared spectroscopy". Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/35911.
Pełny tekst źródłaMaster of Science
Boone, Marc. "High-definition optical coherence tomography: Contribution to the non-invasive near infrared optical imaging techniques of the skin". Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/232235.
Pełny tekst źródłaDoctorat en Sciences médicales (Santé Publique)
info:eu-repo/semantics/nonPublished
Martinić, Ivana. "Novel perspectives in near-infrared optical imaging with lanthanide based molecules, macromolecules and nanomaterials". Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2033.
Pełny tekst źródłaThe near-infrared (NIR) region has a significant importance for optical imaging due to the minimal autofluorescence and reduced light scattering thus allowing for improved signal-to-noise ratio and deeper penetration through tissues. Nowadays, the most commonly used NIR-emitting fluorescent probes rely mainly on organic fluorophores or quantum dots and exhibit drawbacks. Several lanthanide(III) ions (Ln³⁺) possess unique optical properties e.g. sharp emission bands the wavelengths of which have minimal sensitivity to the microenvironment, large differences between excitation and emission wavelengths and strong resistance toward photobleaching. In order to obtain the luminescence of lanthanides, the low absorbances of the free Ln³⁺ have to be overcome by the use of appropriate chromophoric groups functioning as a sensitizing “antenna”. We present here several families of Ln³⁺-based probes: (i) small molecules, in particular monometallic complexes constituted by the TTHA-anthraquinone moiety and Ln³⁺, and polymetallic self-assembled Ln³⁺/Zn²⁺ metallacrowns; (ii) novel nanomaterials based on polystyrene beads with two different loadings, i.e. d-f bimetallic Cr³⁺- Ln³⁺+ complex and hydroxyanthraquinone antennae and Ln³⁺ ; (iii) macromolecular generation-3 polyamidoamine dendrimers functionalized with aza-BODIPY sensitizers at their periphery and encapsulating the luminescent Ln³⁺. The photophysical properties, cytotoxicity and cellular uptake were reported and discussed for each of the presented types of Ln³⁺-based probes. Moreover, these probes were successfully tested for visible and/or NIR in vitro imaging by confocal or epifluorescence microscopy experiments. Finally, the reported Ln³⁺-based probes, due to the number of advantageous properties, represent significant breakthroughs toward the developments of new generations of optical imaging agents
Van, der Zee Pieter. "Measurement and modelling of the optical properties of human tissue in the near infrared". Thesis, University of London, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319667.
Pełny tekst źródłaKearns, Hayleigh. "Hollow gold nanoshells as unique near infrared optical materials for surface enhanced Raman scattering". Thesis, University of Strathclyde, 2016. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=26531.
Pełny tekst źródłaHesselbach, Erica N. "Probing the Circumstellar Disks of Classical Be Stars with Optical and Near-Infrared Spectroscopy". Connect to full text in OhioLINK ETD Center, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1249334993.
Pełny tekst źródłaTypescript. "Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Doctor of Philosophy Degree in Physics ." Bibliography: leaves 71-74.
Nagel, Evangelos [Verfasser], i Jürgen [Akademischer Betreuer] Schmitt. "High precision optical and near-infrared velocimetry with CARMENES / Evangelos Nagel ; Betreuer: Jürgen Schmitt". Hamburg : Staats- und Universitätsbibliothek Hamburg, 2020. http://d-nb.info/121218095X/34.
Pełny tekst źródłaSTEIJN, KIRK WILLIAM. "COUPLING AND PROPAGATION OF SURFACE PLASMONS IN THE FAR-INFRARED (NEAR-MILLIMETER WAVES, SUB-MILLIMETER WAVES)". Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183973.
Pełny tekst źródłaParsa, Shahrzad. "High-power fiber-laser-pumped picosecond nonlinear optical sources from the near- to mid-infrared". Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/620786.
Pełny tekst źródłaLas fuentes coherentes de picosegundos ultrarrápidos en el rango espectral de infrarrojo cercano a infrarrojo medio (IR) son de gran interés para una amplia variedad de aplicaciones tales como pump-probe espectroscopia, la teledetección, la fotobiología y las nuevas técnicas de upconversion imaging. La óptica no lineal, y en particular las técnicas de conversión de frecuencia no lineal, ofrecen un enfoque eficiente y eficaz para la realización de fuentes que emiten tales radiaciones, ya que hoy en día, las fuentes basadas en la conversión de frecuencia no lineal son fuentes viables y fiables de emisión de radiaciones láser con amplia sintonía de longitud de onda y escalabilidad de potencia, sin necesidad de refrigeración criogénica. En esta tesis, hemos demostrado fuentes de picosegundos de alta potencia y alta tasa de repetición basadas en procesos de conversión de frecuencia no lineales a través de osciladores ópticos paramétricos (OPO) y generación de frecuencias de diferencia (DFG) para cubrir la región de longitud de onda de IR cercano a IR medio del espectro electromagnético. Hemos desarrollado una fuente de picosegundos estable, de alta tasa de repetición, rápidamente sintonizable, basado en un cristal PPKTP con períodos de rejilla diseñados en forma de abanico. El OPO, es bombeado sincrónicamente por un mode-locked láser de fibra de Yb, doblado en frecuencia para generar verde a 532 nm, que proporciona radiación estable y de alta potencia rápidamente sintonizable de 749-962 nm en el signal y de 1189-1838 nm en el idler, a temperatura ambiente. Además, hemos demostrado lo que creemos que es la primera fuente de picosegundos sintonizable con alta tasa de repetición basada en el cristal OP-GaP en el IR medio. Usando una DFG de un solo paso entre un mode-locked láser de fibra de Yb a 1064 nm y la salida ajustable de un OPO de picosegundo basado en un cristal de MgO:sPPLT bombeado sincrónicamente por el mismo láser, la fuente generó radiación sintonizable de 3040-3132 nm en el medio-IR a la velocidad de repetición de ~80 MHz, con buena calidad de haz. Además, también presentamos el primer OPO de picosegundos de alta potencia y buena calidad de haz, con resonancia del idler, basado en un cristal MgO:PPLN de rejilla múltiple sintonizable a lo largo de 2100-4000 nm en el IR medio. El OPO proporcionó hasta 3.5 W de radiación de IR medio con valores de M2 mejores que 1.8 tanto en dirección horizontal como vertical
Buset, Jonathan. "Near infrared optical manipulation of a GaAs/AlGaAs quantum well in the quantum hall regime". Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=21957.
Pełny tekst źródłaL'utilisation du spin electronique plutot que la charge electronique pour remplacer les systemes microelectroniques a ete un domaine bien etudie de la recherche au cours des dix dernieres annees. Plus recemment, la recherche a porte sur l'utilisation du spin nucleaire du GaAs plutot que le spin electronique. Ce travail a demontre que les spins nucleaires du GaAs ont de nombreuses proprietes desirables et montrent un grand potentiel en tant que transporteurs de l'information quantique. Le defi dans la mise en oeuvre des spins nucleaires reside dans la capacite de controler et de recuperer les informations qu'elles transportent. Une methode proposee consiste a polariser dynamiquement les spins nucleaires du GaAs en utilisant la photoexcitation polarisee circulairement. Ceci pourrait ouvrir de nouveaux horizons dans le domaine du traitement de l'information quantique. Cette these expose en details une enquete sur l'utilisation de la lumiere polarisee pour manipuler les proprietes d'un echantillon puit quantique de GaAs/AlGaAs. Les trois principaux sujets abordes dans cette these sont les suivants: 1) la conception et le fonctionnement d'un controleur de polarisation qui est capable d'emettre une lumiere polarisee bien definie et ajustable sur un echantillon dans un environnement cryogenique a T = 0.27K, 2) la manipulation de la polarisation nucleaire dans le GaAs en utilisant un laser a faible puissance avec une polarisation ajustable, et 3) une enquete preliminaire sur l'illumination d'un echantillon de Hall quantique avec un laser non-focalise a faible puissance et les modifications des proprietes de transport qui se produisent dans le regime de Hall quantique.
Alves, Vaccari Paulo Roberto. "Near infrared and visible optical properties in electrochromic crystalline tungsten oxide thin films on ITO". Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229122.
Pełny tekst źródłaGarcia, Soto Mariano de Jesús. "Synthesis of Gold Nanostructures with Optical Properties within the Near-Infrared Window for Biomedical Applications". Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/321533.
Pełny tekst źródłaAkin, Ryan E. "Minimally invasive assessment of lymphatic pumping pressure using near infrared imaging". Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47536.
Pełny tekst źródłaBazkir, Ozcan. "Realization Of Detector Based Spectral Responsivity Scale From Ultraviolet To Near Infrared Regions Of Electromagnetic Spectrum". Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12605148/index.pdf.
Pełny tekst źródłas, reflectance and internal quantum efficiency the scale between 350- 850 nm ranges was realized with an uncertainty of 0.05 %. Finally, the spectral responsivity scale in ultraviolet (UV) and near-infrared (NIR) regions was realized using Electrically Calibrated Pyroelectric Radiometer (ECPR). Optically characterizing the spatial non-uniformity of pyroelectric detector and its surface reflectance, the spectral responsivity scale was established with uncertainties ±
0.5-1.0 % between 250 nm and 350 nm and ±
0.5-1.5 % between 850 and 2500 nm.
Lim, Jinkang. "All-fiber frequency comb employing a single walled carbon nanotube saturable absorber for optical frequency metrology in near infrared". Diss., Kansas State University, 2011. http://hdl.handle.net/2097/7423.
Pełny tekst źródłaDepartment of Physics
Brian R. Washburn
Optical frequency combs produced by mode-locked fiber lasers are useful tools for high precision frequency metrology and molecular spectroscopy in a robust and portable format. We have specifically investigated erbium doped fiber mode-locked lasers that use single-walled carbon nanotubes as a saturable absorber. We have, for the first time, developed and phase- stabilized a carbon nanotube fiber laser (CNFL) frequency comb. The carbon nanotube saturable absorber, which was fabricated using an optically driven deposition method, permits a high repetition frequency (>150 MHz) since an optical nonlinearity of fibers is not used for mode-locking. The CNFL comb combined with a parabolic pulse erbium doped fiber amplifier (EDFA) has shown a compact, robust, and cost-effective supercontinuum source. The amplified pulse from the parabolic pulse EDFA was compressed with a hollow-core photonic bandgap fiber, which produced a wave-breaking-free pulse with an all-fiber set-up. The stabilized comb has demonstrated a fractional instability of 1.2 ×10[superscript]-11 at 1 sec averaging time, the reference-limited instability. We have performed optical frequency metrology with the CNFL comb and have measured an optical frequency, P(13) which is a molecular overtone transition of C2H2. The measured frequency has shown a good agreement with the known value within an uncertainty of 10 kHz. In order to extend the application of the CNFL comb such as multi-heterodyne dual comb spectroscopy, we have investigated the noise of the CNFL comb and particularly, the broad carrier envelope offset frequency (f[subscript]0) linewidth of the CNFL comb. The primary noise source is shown to be white amplitude noise on the oscillator pump laser combined with the sensitivity of the mode-locked laser to pump power fluctuations. The control bandwidth of f[subscipt]0 was limited by the response dynamics of the CNFL comb. The significant reduction of comb noise has been observed by implementing a phase-lead compensation to extend control bandwidth of the comb and by reducing the pump relative intensity noise simultaneously. Therefore the f[subscipt]0 linewidth has been narrower from 850 kHz to 220 kHz. The integrated phase noise for the f[subscipt]0 lock is 1.6 radians from 100 Hz to 102 kHz.