Ultrafast nanooptics

Optimization, pulse shaping and optical control in nanostructures (Förstner)


We study general aspects of optimization in ultrafast nanooptics
by pulse-shaping and geometry modification):


Design and selection of target functions
(e.g. convergence characteristics, experimental equivalence)

Reduction of complexity for linear&nonlinear optics:
separate full light simulation from optimization loop
exploit superposition; coupled dipoles approach)

approximations, heuristics (e.g. based on time-reversal)
analytic solutions (e.g. phase relations, matrix inversion)

Comparison of optimization algorithms
(e.g. are expensive global/jumping algorithms like genetic optimization
general better for interference-dominated rough landscapes?)

Geometry optimization

grid basedtopologicalmodifications using dielectric functions

volumetric modifications by moving material boundaries


Fig. 1: Nonlinear spatio-temporal control of excitation in a quantum wire. 


Calculus-based optimization of the electron dynamics in nanostructures
A. Walther, M. Reichelt, and T. Meier
Photonics and Nanostructures - Fundamentals and Applications accepted (2011)
Shaping the spatiotemporal dynamics of the electron density in a hybrid metal-semiconductor nanostructure
M. Reichelt and T. Meier
Optics Letters 34 (2009) 2900
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