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This dissertation by Shangzhi Chen explores the optical and structural properties of conducting polymer thin films, specifically focusing on PEDOT-based materials. The research investigates their potential as alternatives to noble metals in plasmonic applications. Using ultra-wide spectral range ellipsometry, the study proposes an anisotropic Drude-Lorentz model to describe the optical conductivity of vapor phase polymerized PEDOT films. It highlights the promise of these materials in developing tunable optical nanoantennas and structural color devices, offering innovative solutions for low-cost displays and labels. The work aims to expand the understanding of conducting polymers' optical properties and their practical applications in photonics.

Conducting polymers. --- Plasmonics.

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This book is built on the recent advancements in understanding thermoplasmonics and highlights the exciting new directions that are shaping this field. Thermoplasmonics using light to heat nanostructures is a promising and rapidly expanding subfield of plasmonics. When the light frequency matches the oscillation frequency of free electrons on the nanostructures, it induces a collective oscillation known as plasmon resonance. This effect allows fantastic control over the optical field at sub-wavelength scales, enhancing the light-matter interaction to surmount the diffraction limits. The plasmon resonance is responsible for fascinating and tunable properties, such as local field enhancement, generation of hot electrons as well as the localized/collective heating. These energetic carriers and heat can be harvested to drive a wide range of physical and chemical processes, making them promising for different fields of science. In this book, we discuss the recent advances in understanding of thermoplasmonics and highlight some of the exciting new directions, covering aspects of its principles, materials, and characterization, along with the diverse applications. The basic fundamentals are first introduced from plasmonic theory and thermodynamics to the thermal-induced processes. Then, much effort is placed on examination of thermoplasmonic materials and the common synthesis methods. The strategies for proper material selection and rational structural design are summarized toward more efficient energy conversion. The synthesizing methods for novel nanostructures are presented with a goal to achieve optimal thermoplasmonic properties. Afterward, the characterization technologies for thermoplasmonics are also addressed, which involves analytic and computational approaches as well as nanoscale thermometry. For each application, the unique role of thermoplasmonics and their associated benefits are elaborated. Research trends and insights into the use of thermoplasmonics to improve performance are analyzed as well. Finally, the current challenges and future perspectives in this field are pointed out in this book.

Nanophotonics. --- Plasmonics. --- Optics. --- Nanophotonics and Plasmonics. --- Light-Matter Interaction.

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Metamaterials offer the possibility to control and manipulate electromagnetic radiation. Spoof surface plasmon metamaterials are the focus of this Element of the Metamaterials Series. The fundamentals of spoof surface plasmons are reviewed, and advances on plasmonic metamaterials based on spoof plasmons are presented. Spoof surface plasmon metamaterials on a wide range of geometries are discussed: from planar platforms to waveguides and localized modes, including cylindrical structures, grooves, wedges, dominos or conformal surface plasmons in ultrathin platforms. The Element closes with a review of recent advances and applications such as Terahertz sensing or integrated devices and circuits.

Metamaterials. --- Plasmons (Physics) --- Surfaces (Physics) --- Plasmonics.

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optics --- optoelectronics --- photonics --- plasmonics --- quantum optics --- solar cell

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The linear and nonlinear resonance behaviour of optical antennas (metallic nanostructures showing resonance behaviour at optical frequencies) made of gold and aluminum using electron-beam lithography is investigated. Specifically, it is of interest how the emission behaviour is changed by the coupling of two antenna arms via a small gap. Experimental techniques applied include dark-field spectroscopy and two-photon luminescence.

plasmonics --- two-photon luminescence --- nanostructure --- resonance --- optical antenna