Graphene and carbon nanotubes

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A better understanding of ultrafast relaxation dynamics of excited carriers is essential for designing novel carbon-based optoelectronic devices. This book introduces the ultrafast nanoworld of graphene and carbon nanotubes, highlighting their unique properties and future perspectives. The authors review recent advancements by integrating theoretical and experimental insights into microscopic processes in carbon nanostructures. The initial section provides a theoretical framework for characterizing nanomaterials, while recent breakthroughs, particularly in pump-probe spectroscopy for studying ultrafast carrier relaxation, are discussed in a guest contribution. The next section focuses on the electronic properties of graphene and carbon nanotubes, with an in-depth examination of relaxation dynamics. The third part addresses optical properties, analyzing absorption spectra in graphene and carbon nanotubes, including semiconducting, metallic, and functionalized varieties. A clear theoretical foundation is presented, supported by an appendix covering the theoretical description of carbon nanostructures, observables in optical experiments, second quantization, equations of motion, and correlation effects. By merging theory and experiment, this book serves as an invaluable resource for graduate students and researchers in physics, materials science, and electrical engineering involved in optoelectronic devices, renewable energies, a