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- Helmholtz Institute JenaDE407 papers
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8 papers · 2 filters
Using Machine-Learning to Optimize phase contrast in a Low-Cost Cellphone Microscope
Benedict Diederich, Rolf Wartmann, Harald Schadwinkel +1
Cellphones equipped with high-quality cameras and powerful CPUs as well as GPUs are widespread. This opens new prospects to use such existing computational and imaging resources to…
An optical metamixer
Sheng Liu, Polina P. Vabishchevich, Aleksandr Vaskin +5
A frequency mixer is a nonlinear device that combines electromagnetic waves to create waves at new frequencies. Mixers are ubiquitous components in modern radio-frequency technolog…
Young's Double-Slit, Invisible Objects and the Role of Noise in an Optical Epsilon-near-Zero Experiment
Daniel Ploss, Arian Kriesch, Christoph Etrich +2
Epsilon-near-zero (ENZ) media disclose the peculiarities of electrodynamics in the limit of infinite wavelength but non-zero frequency for experiments and applications. Theory sugg…
Single freeform surface design for prescribed input wavefront and target irradiance
Christoph Bösel, Herbert Gross
In beam shaping applications, the minimization of the number of necessary optical elements for the beam shaping process can benefit the compactness of the optical system and reduce…
Brownian Thermal Noise in Functional Optical Surfaces
S. Kroker, J. Dickmann, C. B. Rojas Hurtado +4
We present a formalism to compute Brownian thermal noise in functional optical surfaces such as grating reflectors, photonic crystal slabs or complex metamaterials. Such computatio…
Scalable on-chip quantum state tomography
James Titchener, Markus Gräfe, René Heilmann +3
Quantum information systems are on a path to vastly exceed the complexity of any classical device. The number of entangled qubits in quantum devices is rapidly increasing and the i…