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Microwave radiometry of vegetation canopies
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ISBN: 1280625171 9786610625178 1402046820 1402046812 9048171709 Year: 2006 Publisher: Dordrecht : Springer,

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Abstract

Research into microwave radiation from the Earth’s surface in the presence of vegetation canopies, as well as the development of algorithms for retrieval of soil and vegetation parameters from microwave radiometric measurements, have been actively conducted for the last 30 years by scientific groups worldwide. The capability of the microwave radiometric method to determine soil moisture and vegetation biometric indices was revealed 25 years ago by the author and his colleagues. Soil moisture and vegetation covers play a key role in the hydrological cycle and in water and energy transfer on the border of land surface and atmosphere through evaporation and transpiration. Accomplishment of large international projects shows that microwave radiometry of soil and vegetation has become an instrument of practical application and operational use. A systematic account of questions concerning the microwave radiometry of the Earth’s surface in the presence of vegetation canopies is the main objective of the book.


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Characterization of Terahertz emission from high resistivity Fe-doped Bulk Ga0.69In0.31As based photoconducting antennas : doctoral thesis accepted by Rensselaer Polytechnic Institute, Troy, USA
Authors: --- ---
ISBN: 1441981977 1441981985 Year: 2011 Publisher: New York : Springer,

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Abstract

Terahertz science and technology is attracting great interest due to its application in a wide array of fields made possible by the development of new and improved terahertz radiation sources and detectors. This book focuses on the development and characterization of one such source - namely the semi-large aperture photoconducting (PC) antenna fabricated on Fe-doped bulk Ga0.69In0.31As substrate. The high ultrafast carrier mobility, high resistivity, and subpicosecond carrier lifetime along with low bandgap make Ga0.69In0.31As an excellent candidate for PC antenna based THz emitter that can be photoexcited by compact Yb-based multiwatt laser systems for high power THz emission. The research is aimed at evaluating the impact of physical properties of a semi-large aperture Ga0.69In0.31As PC antenna upon its THz generation efficiency, and is motivated by the ultimate goal of developing a high-power terahertz radiation source for time-domain terahertz spectroscopy and imaging systems. This Doctoral Thesis has been accepted by Rensselaer Polytechnic Institute, Troy, USA.

Keywords

Femtochemistry. --- Millimeter wave devices. --- Optoelectronic devices. --- Submillimeter waves. --- Terahertz technology. --- Submillimeter waves --- Physics --- Physical Sciences & Mathematics --- Light & Optics --- Electricity & Magnetism --- Microwave spectroscopy. --- Photo electric devices --- Photo electronic devices --- Photoelectronic devices --- Submillimeter radiation --- Submillimeter-terahertz radiation --- Terahertz radiation --- Waves, Submillimeter --- Physics. --- Semiconductors. --- Lasers. --- Photonics. --- Spectroscopy. --- Microscopy. --- Optical materials. --- Electronic materials. --- Spectroscopy and Microscopy. --- Laser Technology, Photonics. --- Optical and Electronic Materials. --- Molecular spectroscopy --- Radiofrequency spectroscopy --- Electronic apparatus and appliances --- Optical instruments --- Electrooptical devices --- Integrated optics --- Electromagnetic waves --- Radiation --- Optics, Lasers, Photonics, Optical Devices. --- Optics --- Materials --- Electronic materials --- New optics --- Light amplification by stimulated emission of radiation --- Masers, Optical --- Optical masers --- Light amplifiers --- Light sources --- Optoelectronic devices --- Nonlinear optics --- Optical parametric oscillators --- Crystalline semiconductors --- Semi-conductors --- Semiconducting materials --- Semiconductor devices --- Crystals --- Electrical engineering --- Electronics --- Solid state electronics --- Analysis, Microscopic --- Light microscopy --- Micrographic analysis --- Microscope and microscopy --- Microscopic analysis --- Optical microscopy --- Analysis, Spectrum --- Spectra --- Spectrochemical analysis --- Spectrochemistry --- Spectroscopy --- Chemistry, Analytic --- Interferometry --- Wave-motion, Theory of --- Absorption spectra --- Light --- Spectroscope --- Qualitative --- Spectrometry --- Analytical chemistry

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