Person:
Filler, Michael A.

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    Celebrating Silicon: Its Success, Hidden History, and Next Act
    ( 2019-03-05) Filler, Michael A.
    The history of silicon is usually told as a history of electronic materials and devices. However, it is better told as a history of manufacturing innovation. This talk will take a journey through the manufacturing innovations that transformed silicon from its humble beginnings as the most abundant metal in Earth’s crust to the enabler of the computer chips that underpin the modern economy. The journey begins with the extraction of silicon from sand and its processing into the most compositionally pure and structurally perfect human-made material. It continues through the mid-20th century breakthroughs that allowed fabrication and interconnection of high-quality electronic devices to form integrated circuits. It is from this perspective that we can most easily appreciate silicon’s impact on modern society and why it is finding increasing utility in technology areas as diverse as renewable energy, environmental sensing, and augmented reality. It is also from this perspective that we can understand silicon’s limitations and begin to see what innovations might be necessary to enable silicon’s next act.
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    Celebrating Silicon’s Success, its Hidden History, and its Next Act
    (Georgia Institute of Technology, 2019-02-26) Filler, Michael A.
    The history of silicon is usually told as a history of electronic materials and devices. However, it may be better told as a history of manufacturing innovation. This talk will take a journey through the manufacturing innovations that transformed silicon from its humble beginnings as the most abundant metal in Earth’s crust to the enabler of the computer chips that underpin the modern economy. The journey begins with the extraction of silicon from sand and its processing into the most compositionally pure and structurally perfect human-made material. It continues through the mid-20th century breakthroughs that allowed for the fabrication and interconnection of high-quality electronic devices to form integrated circuits. It is from this perspective that we can most easily appreciate silicon’s impact on modern society and why it is finding increasing utility in technology areas as diverse as renewable energy, environmental sensing, and augmented reality. It is also from this perspective that we can understand the limitations of today’s manufacturing paradigm and begin to see what innovations might be necessary to enable silicon’s next act.
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    Expanding the Semiconductor Nanowire Design Space
    (Georgia Institute of Technology, 2012-08-28) Filler, Michael A.
    Semiconductor nanowires are promising building blocks for a diverse range of next generation electronic, photonic, and energy conversion devices. The physical properties of these materials, and nanostructures in general, are intimately connected to their structure, which must be controlled with atomic-level precision. Unfortunately, the accessible design space remains limited by a reliance on chemistries that were originally developed for 2-D thin film growth. The 3-D nature of nanowires requires new strategies with which to manipulate growth processes and engineer structure. This talk will provide an overview of our recent efforts to advance semiconductor nanowire complexity and function by expanding the available synthetic “toolkit.” Our experimental approach couples the real-time in-situ spectroscopic interrogation of nanowire chemistry with post-growth structural characterization. We connect nanowire crystal structure with the specific chemical bonds present during synthesis and, in doing so, provide a robust foundation from which to rationally achieve novel structural motifs. The role of hydrogen as the root cause of well-known phenomena in Si nanowire growth will be discussed in detail. We subsequently leverage this fundamental knowledge to generate new types of superstructures with user-defined periodicity.