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2019
Doctoral Thesis
Titel
Optical and Electrical Signal Transduction by Nanoplasmonic Structures for Emerging Sensing and Device Applications
Abstract
""There are still plenty of room at the bottom."" This sentence is presented 60 years after Richard Feynman's lecture on the atomic sized world. In other words, the new form of optoelectronics and nanophotonic technology that were recently announced surpassed his ideas and thinking. One of the fascinating areas of research in new nanophotonics, Quantum Plasmonics, was born out of the trend to uncover a ""still plenty of room at the bottom"". It provides the cutting edge of information processing technology and can meet the ever-increasing speed and capacity demands of quantum computing or quantum cryptography. Ultimately, it enables the ultimate miniaturization of photonic components and gives the extreme limits in the light-matter interactions. In this dissertation, we are going to fabricate the nanostructure, provide a functionality on single and hybridized nanoplasmonic structures, elucidate the classical and quantum plasmonic properties of them, and then manipulate the structure in order to transduce the signal between the optical and electrical and vice versa. These following investigations enable the classical sensing and photodetector platform and further potential quantum state sensing, device, emitters, and new optoelectronics applications. More details, the dissertation strongly focuses on the nanoplasmonic coupling structure that allows the nanometer and sub-nanometer gap. Within this gap, the atomic-center induces the quantum tunneling through the junction thus enabling the potential optical switch application. In addition, the interaction of light and single nanoplasmonic structure are investigated to understand the photoconductivity at the different light conditions (wavelength, polarization, and coherency) and also hybridized structures are demonstrated with a nanometer scale gap thereby providing not only understanding to quantum science at the nanoscale but also a solid foundation for designing quantum devices at the system level. For the final research, we studied element technology that enables the miniaturization of light sources by designing atomic layer stacking devices for photon emitter applications by inelastic electron tunneling in nanometer scale gaps. The two topics in classical plasmonics (fabrication and functionalization for scalable nanoplasmonic sensing platform in large an area) and three topics in quantum plasmonics (photoconductivity modulation of nanowire and nanowire-particle system, quantum tunneling in particle-on-film system, inelastic electron tunneling in atomic layer stacking structure) provide novel understanding on light-matter interaction from the range of atomic size to nanoscale thus leading a convergence applications in nanophotonic technology.
ThesisNote
Yonsei, Univ., Diss., 2019
Advisor
Verlagsort
Seol
Language
English
Tags
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quantum devices
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nanoplasmonics
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quantum plasmonics
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Particle-on-Film system
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plasmonic nanowire
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plasmon coupling structure
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Microfluidics
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integrated photonics
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biomolecule sensing
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photodetector
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photoconductivity
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plasmon emitter
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self-assembled monolayer (SAM)
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Thiol based chemistry
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light-matter interaction
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nano gap and metasurface structure