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Vacuum Ultraviolet Dielectric Function and Band Structure of ZnO
Rudiger Schmidt-Grund,Bernd Rheinlander,Evgeni M. Kaidashev,Michael Lorenz,Marius Grundmann,Daniel Fritsch,Mathias M. Schubert,Heidemarie Schmidt,Craig M. Herzinger 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.1
For ZnO, the optical dielectric functions for polarizations parallel and perpendicular to the optical axis were determined in the photon energy range from 4.0 to 9.5 eV by using generalized spectroscopic ellipsometry and the band structure was calculated by means of the empirical pseudopotential method. From the band structure, a theoretical dielectric function was derived. The dielectric functions reveal features that were identied as band-to-band transitions. The energies of those transitions were assigned to band-to-band transition energies of critical points of the calculated band structure. For ZnO, the optical dielectric functions for polarizations parallel and perpendicular to the optical axis were determined in the photon energy range from 4.0 to 9.5 eV by using generalized spectroscopic ellipsometry and the band structure was calculated by means of the empirical pseudopotential method. From the band structure, a theoretical dielectric function was derived. The dielectric functions reveal features that were identied as band-to-band transitions. The energies of those transitions were assigned to band-to-band transition energies of critical points of the calculated band structure.
Fumiko Kano Glückstad,Mikkel N. Schmidt,Morten Mørup 글로벌지식마케팅경영학회 2018 Global Marketing Conference Vol.2018 No.07
This presentation introduces a methodological framework that analyzes a model of destination image formation (Baloglu & McCleary 1999; Beerli & Martin 2004). Specifically, the main aims of this study are to investigate what type of stimulus factors (information sources) are connected to the formation of destination image, and to explore if there is a connection between their strength of willingness to visit a destination and their patterns to associate with the destination. The study employs an advanced nonparametric Bayesian relational model (Glückstad, Herlau, Schmidt, Rzepka, Araki and Mørup 2013; Mørup, Glückstad, Herlau & Schmidt, 2014) for a two-steps analysis . The first step attempts to segment consumers according to patterns of attributes consumers associate with three arbitrary selected destinations. The second step statistically analyzes latent structural patterns per segment by contrasting two independent datasets, one consisting of information sources and members of a segment and another consisting of destination attributes and the members of the segment. The results of two-steps analysis demonstrated that patterns of attributes respondents associate with the three selected destinations differ across individuals and the applied method enabled to segment respondents according to the differences, and consumers’ associations, their willingness to visit the destinations and types of information sources they have accessed to learn about the destinations are connected to each other.
175 fs Tm:Lu2O3 laser at 2.07 ?m mode-locked using single-walled carbon nanotubes.
Schmidt, Andreas,Koopmann, Philipp,Huber, G?nter,Fuhrberg, Peter,Choi, Sun Young,Yeom, Dong-Il,Rotermund, Fabian,Petrov, Valentin,Griebner, Uwe Optical Society of America 2012 Optics express Vol.20 No.5
<P>Single-walled carbon nanotube saturable absorbers were designed and fabricated for passive mode-locking of bulk lasers operating in the 2 μm spectral range. Mode-locked lasers based on Tm:Lu2O3 single crystals containing different Tm3+-doping concentrations were studied. Nearly transform-limited pulses as short as 175 fs at 2070 nm were generated at 88 MHz repetition rate.</P>
Perylene Bisimide Radicals and Biradicals: Synthesis and Molecular Properties
Schmidt, David,Son, Minjung,Lim, Jong Min,Lin, Mei‐,Jin,Krummenacher, Ivo,Braunschweig, Holger,Kim, Dongho,Wü,rthner, Frank WILEY‐VCH Verlag 2015 Angewandte Chemie. international edition Vol.54 No.47
<P><B>Abstract</B></P><P>Unprecedented neutral perylene‐3,4:9,10‐tetracarboxylic acid bisimide (PBI) radicals and biradicals were synthesized by facile chemical oxidation of 4‐hydroxyaryl‐substituted PBIs. Subsequent characterization by optical and magnetic spectroscopic techniques, as well as quantum chemical calculations, revealed an open‐shell singlet biradical ground state for the PBI biradical <B>OS</B>‐<B>2<SUP>..</SUP></B> (〈s<SUP>2</SUP>〉=1.2191) with a relatively small singlet–triplet energy gap of 0.041 eV and a large singlet biradical character of <I>y</I>=0.72.</P>