Takayoshi Kobayashi – författare

This book describes the basic physical principles of techniques to generate and ultrashort pulse lasers and applications to ultrafast spectroscopy of various materials covering chemical molecular compounds, solid-state materials, exotic novel materials including topological materials, biological molecules and bio- and synthetic polymers. It introduces non-linear optics which provides the basics of generation and measurement of pulses and application examples of ultrafast spectroscopy to solid state physics. Also it provide not only material properties but also material processing procedures. The book describes also details of the world shortest visible laser and DUV lasers developed by the author’s group. It is composed of the following 12 Sections: The special features of this book is that it is written by a single author with a few collaborators in a systematic way. Hence it provides a comprehensive and systematic description of the research field of ultrashort pulse lasers and ultrafast spectroscopy.Generation of ultrashort pulses in deep ultraviolet to near infraredGeneration of ultrashort pulses in terahertzCarrier envelope phase (CEP)Simple NLO processes with a few colorsMulti-color involved NLO processesMulti-color ultrashort pulse generationNLO materialsNLO processes in time-resolved spectroscopyLow dimension materialsConductors and superconductorsChemical reactions and material processingPhotobiological reactions

This book describes the basic physical principles of techniques to generate and ultrashort pulse lasers and applications to ultrafast spectroscopy of various materials covering chemical molecular compounds, solid-state materials, exotic novel materials including topological materials, biological molecules and bio- and synthetic polymers. It introduces non-linear optics which provides the basics of generation and measurement of pulses and application examples of ultrafast spectroscopy to solid state physics. Also it provide not only material properties but also material processing procedures. The book describes also details of the world shortest visible laser and DUV lasers developed by the author’s group. It is composed of the following 12 Sections: The special features of this book is that it is written by a single author with a few collaborators in a systematic way. Hence it provides a comprehensive and systematic description of the research field of ultrashort pulse lasers and ultrafast spectroscopy.Generation of ultrashort pulses in deep ultraviolet to near infraredGeneration of ultrashort pulses in terahertzCarrier envelope phase (CEP)Simple NLO processes with a few colorsMulti-color involved NLO processesMulti-color ultrashort pulse generationNLO materialsNLO processes in time-resolved spectroscopyLow dimension materialsConductors and superconductorsChemical reactions and material processingPhotobiological reactions

This book covers the principle, structure, enhancement of sensitivity and resolution power of photothermal and Raman microscopies. It includes real-world applications to biological and medical targets.Advanced Microscopy: Photo-Thermal and Induced-Raman Microscopy introduces clear descriptions of various Raman processes such as spontaneous, stimulates, coherent anti-Stokes Raman (CARS), Raman loss and Stokes Raman (gain). It covers pump-probe microscopies using actinic (pump) laser and sensing (probe) laser resulting in improvement due to intrinsic nonlinearity, which provides an advantage in the imaging of nonfluorescent targets. The author also provides solutions to noise and sensitivity problems which are two of the most important concerns in the microscopy applications. Finally, the book also draws direct comparisons of the advantages and drawbacks of a Raman microscopes in comparison with photothermal microscopes.The book will be useful to researchers and non-specialists in biomedical fields using optics and electronics relevant to (optical) microscopes. It will also be a helpful resource to graduate students in the fields of biology and medical research who are using photothermal microscopes in their research.

This book highlights the physical processes of quantum mechanics, such as quantum interference, entanglement, and quantum teleportation, within the topic of quantum information and quantum computing.Quantal and Classical Coherence and Correlation begins with exploring the general mathematical and physical concepts of coherence and correlation and provides a comparative discussion of classical and quantum coherence and correlation. In this context, the author explains the principles of quantum information, and the discussion then moves to material coherence and optical coherence and their control. He then discusses the differences between classical and quantal information techniques. The book closes with a discussion on the application probabilities of quantum technologies by examining the present and future applications of coherence. This book is intended for upper‑level undergraduate and graduate physics and engineering students who are studying nonlinear optics, light–matter interaction, and quantum information; and industrial professionals who are involved in electronics and photonics. It will also be of interest to engineers who are involved in quantum information and quantum networks.

Living things use solar energy in two ways: in the transmission of information and in the conversion of light energy to chemical energy. In order to elucidate the molecular mechanisms of highly sensitive visual responses and other photosensitive responses of biological systems, and the very efficient transduction of photoenergy to chemical energy in photosynthesis, it is important to observe molecular processes in biological systems. Using highly developed laser spectroscopic techniques, great progress has recently been achieved in the area of various primary processes in photobiology. It was therefore an excellent time to hold the 12th Taniguchi International Symposium, Biophysics Division, on Primary Processes in Photobiology. This volume is the proceedings of that symposium. Among the topics discussed are the femtosecond molecular processes in photosynthetic bacteriochlorophyll and the recently discovered intermediates in the photocycles of rhodopsin (found in the visual pigments of many animals), bacteriorhodopsin (found in the proton-pumping pigments of halobacteria) and retinochrome. New techniques for the measurement of the primary processes are also reported.

Just after the International Quantum Electronics Conference, which took place in Tokyo, July 18-21, 1988, a symposium on "Nonlinear Optics of Org~ics and Semiconductors" was held on the Hongo campus of the University of Tokyo on July 25 and 26, 1988. Recently, nonlinear optical materials have started to attract the attention of many scientists, not only in the field of quantum electronics but also in organic chemistry, and solid-state physics, especially semiconductor physics. Therefore this area of investigation is really interdisciplinary and necessitates understanding from different viewpoints for continuous growth of the research activity in the field. This book contains many papers written by scientists active in the field of nonlinear optics of organic materials and semiconductors. The first two parts of the book discuss mainly the basic physics of nonlinear optics of semiconduc­ tors, including bulk and quantum well structure semiconductors. The papers in Parts ill-VIII concern mainly organic materials. They include the calculation of molecular polarizability, synthesis, the measurement of optical nonlinearity and characterization. The final part is on potential device applications. The symposium was organized in collaboration with Prof. Shinsuke Umegaki of Tokyo Technical Institute, and Dr. Hachiro Nakanishi of the Research Institute of Polymers and Textiles. Preparations for the conference were made with the help of Dr. Masayuki Yoshizawa, Miss Nanae Indou, Mrs. Yoko Sasaki and graduate students (Mrs. T. Hattori, M. Terauchi, K. Ichimura, A. Terasaki, K.

Conjugated polymers are attractive from the viewpoint of possible applications as novel nonlinear optical materials and conductive materials. They are also very important as a group of materials of one dimensionality. The progress of research in this field is very rapid. At the present stage it is extremely useful to have review articles giving information on the most recent progress.Relaxation in Polymers contains state-of-the-art reviews on: ultrafast responses in various conjugated polymers with large optical nonlinearity; ultrafast relaxation in polysilanes; electronic properties of polysilanes; fast transient photoconductivity studies of polyacetylene and polydiacetylene; evolution of photoexcitations in polyacetylene and related polymers from femtoseconds to milliseconds; photoexcited states in conjugated polymers, optical properties of halogen-bridged mixed-valent metal complexes and dynamics of soliton pairs in polyacetylene.

In view of the rapid growth in both experimental and theoretical studies of multiphoton process and multiphoton spectroscopy of atoms, ions and molecules in chemistry, physics, biology, materials science, etc., it is desirable to publish an advanced series that contains review papers readable not only by active researchers in these areas, but also by those who are not experts in the field but who intend to enter the field. The present series attempts to serve this purpose. Each review article is written in a self-contained manner by the experts in the area so that the readers can grasp the knowledge in the area without too much preparation.

J-aggregates have a long history of research but so far no books have been published on this group of very interesting materials. The book is on the structures, electronic states, linear and nonlinear optical properties and spectroscopies of the J-aggregates. Various properties and processes of J-aggregates such as superradiance, excitons, photon echo, geometrical structure, electron transfer and femtosecond spectroscopy are also discussed. The contributors are those actively working in the field.