Fraunhofer Institute for Applied Optics and Precision Engineering

Fault-tolerant adaptive switching control of deformable mirrors under actuator failures and saturation limits

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Polarization‐Dependence of Nonlinear Optical Effects in Silicon: The Case of Ultrafast Processing

ABSTRACT We investigate the role played by polarization in the propagation of intense ultrashort pulses in the bulk of silicon. Using a pump‐probe experiment and a nonlinear transmission measurement, we first address the differences in the beam evolution between linear and circul...

Enhancement of Circular Dichroism in Chiral Dielectric Metasurfaces by Ion Beam Irradiation

ABSTRACT Resonant chiral dielectric metasurfaces can support circular dichroism exceeding that of natural materials, but their small dissipative losses simultaneously limit the maximization of circular dichroism, which inherently relies on absorption. Importantly, while the condi...

Insights Into the Nature of Quantum Emitters in Electron‐Irradiated Hexagonal Boron Nitride

ABSTRACT Quantum emitters in hexagonal boron nitride (hBN) have emerged as a promising solid‐state platform for quantum technology applications. However, a persistent challenge in the field is the unclear origin of many observed emission lines, particularly in the visible range,...