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physics.optics2017★ 103 cited
Focusing inside Disordered Media with the Generalized Wigner-Smith Operator
Philipp Ambichl, Andre Brandstötter, Julian Böhm +3
We introduce a wavefront shaping protocol for focusing inside disordered media based on a generalization of the established Wigner-Smith time-delay operator. The key ingredient for…
physics.optics2016★ 1.1k cited
Dynamically encircling exceptional points in a waveguide: asymmetric mode switching from the breakdown of adiabaticity
Jörg Doppler, Alexei A. Mailybaev, Julian Böhm +7
Physical systems with loss or gain feature resonant modes that are decaying or growing exponentially with time. Whenever two such modes coalesce both in their resonant frequency an…