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GaN-Based Laser Diodes
The emergence of highly efficient short-wavelength laser diodes based on the III-V compound semiconductor GaN has not only enabled high-density optical data storage, but is also expected to revolutionize display applications. Moreover, a variety of scientific applications in biophotonics, materials research and quantum optics can benefit from these versatile and cost-efficient laser light sources in the near-UV to green spectral range. This thesis describes the device physics of GaN-based laser diodes, together with recent efforts to achieve longer emission wavelengths and short-pulse emission. Experimental and theoretical approaches are employed to address the individual device properties and optimize the laser diodes toward the requirements of specific applications.
III-Nitride Based Light Emitting Diodes and Applications
Light emitting diodes (LEDs) are already used in traffic signals, signage lighting, and automotive applications. However, its ultimate goal is to replace traditional illumination through LED lamps since LED lighting significantly reduces energy consumption and cuts down on carbon-dioxide emission. Despite dramatic advances in LED technologies (e.g., growth, doping and processing technologies), however, there remain critical issues for further improvements yet to be achieved for the realization of solid-state lighting. This book aims to provide the readers with some contemporary LED issues, which have not been comprehensively discussed in the published books and, on which the performance of L...
Views of Violence
Twenty-first-century views of historical violence have been immeasurably influenced by cultural representations of the Second World War. Within Europe, one of the key sites for such representation has been the vast array of museums and memorials that reflect contemporary ideas of war, the roles of soldiers and civilians, and the self-perception of those who remember. This volume takes a historical perspective on museums covering the Second World War and explores how these institutions came to define political contexts and cultures of public memory in Germany, across Europe, and throughout the world.
Design and fabrication of GaN-based laser diodes for single-mode and narrow-linewidth applications
In this work, several aspects concerning (In,Al,Ga)N laser diodes with high spectral purity, designed for applications in spectroscopy, were studied. A complete fabrication process for ridgewaveguide laser diodes on GaN substrate was developed. The lateral size of the ridge waveguides was as narrow as 1.5 μm: this is necessary in order to achieve lateral single-mode lasing in (In,Al,Ga)N laser diodes. A peculiar property of (In,Al,Ga)N laser diodes is that, when the ridge is narrow, the threshold current strongly depends on the ridge etch depth. This phenomenon was investigated by fabricating laser diodes with different etch depths. For ridge widths below 2 μm, the threshold current of sha...
Das Totenfürsorgerecht
Die vorliegende Untersuchung befasst sich mit den allgegenwärtigen Fragen, welches rechtliche Schicksal der menschliche Körper nach dem Tod nimmt, ob der Leichnam vererbt wird und wer in welchem Umfang über ihn bestimmen darf. Die Autorin gelangt zu dem Ergebnis, dass das Totenfürsorgerecht als wesentlicher Bestandteil des - im Grundgesetz als Staatszielbestimmung zu verankernden - sog. postmortalen Persönlichkeitsschutzes auf die Wahrung der Pietät ziele und zuvörderst dem Willen des Verstorbenen verpflichtet sei. Bei unbekanntem Verstorbenenwillen dürfe der Totenfürsorgeberechtigte aber in einigen wenigen Bereichen auch eigene Entscheidungen über den ihm anvertrauten Leichnam treffen. Der Umgang mit dem Leichnam lasse sich bislang keinem bekannten Rechtsinstitut zuordnen und stelle Gewohnheitsrecht dar. Gegenwärtig herrsche Rechtsunsicherheit. Zur Behebung des gesetzgeberischen Defizits schlägt die Autorin ein Bundesgesetz vor und unterbreitet hierfür einen Gesetzesvorschlag.
Juridisk ugeskrivt
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Britons and their Battlefields
While much attention has been paid to the commemoration of conflict in the twentieth century, this book is the first to consider conflict memory in the long term, arguing that modern practices were not created out of the mud of the trenches, but evolved from much longer practices. From the fourteenth century to the present day, this work analyses the changing commemoration and memories of British battlefields at home and overseas, from Bannockburn (1314) to Bosworth (1485) to Basra (1914-1921). Across these seven centuries, there have been a series of recurring post-battle rituals that have shaped and continue to shape memories of conflict. Three distinct but overlapping periods of memory ca...
Kinder- und Jugendliteraturforschung 1999/2000
Die sechste Folge des Jahrbuchs widmet sich dem Thema »Kinder- und Jugendliteratur und Erziehung/Pädagogik«.
