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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.
Passive mode locking of Yb:KLuW using a single-walled carbon nanotube saturable absorber.
Schmidt, Andreas,Rivier, Simon,Steinmeyer, Gü,nter,Yim, Jong Hyuk,Cho, Won Bae,Lee, Soonil,Rotermund, Fabian,Pujol, Maria C,Mateos, Xavier,Aguiló,, Magdalena,Dí,az, Francesc,Petrov, Va Optical Society of America 2008 Optics letters Vol.33 No.7
<P>Mode locking of an Yb-doped bulk laser in the 1 microm spectral range using a single-walled carbon nanotube saturable absorber (SWCNT-SA) is demonstrated for the first time, to our knowledge. Passive mode locking of an Yb:KLuW laser resulted in nearly transform-limited pulses as short as 115 fs at 1048 nm. In addition, the nonlinear response of the SWCNT-SA was measured, yielding a modulation depth of 0.25% and a relaxation time of 750 fs.</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>