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Micro-optics are optical systems that are between a few micrometres and a millimetre in size. This includes small lenses or arrays of lenses, or optical fibres with a microscale core diameter. Such small optical components are important for integrated optics.
All holographic displays and imaging techniques are fundamentally limited by the étendue supported by existing spatial light modulators. Here, the authors report on using artificial intelligence (AI) to learn an étendue expanding element that effectively increases étendue by two orders of magnitude.
Hair-like sensilla are evolved widely in organisms that perceive mechanical signals. Here, the authors report an all-optical mechano-sensor that can detect the real-time, directional displacement and force at several nm and μN levels.
The authors achieve enhanced cavity loading using complex-frequency excitations that can tailor on-demand the effective coupling rate in a microring resonator by precisely controlling the temporal evolution of the incident pulses.
Optical beams carrying orbital angular momentum (OAM) are promising candidates for free-space optical communication. The authors devise a hybrid optical-electronic convolutional neural network approach reaching a 4-bit OAM-coded signal demultiplexing accuracy of 72.84% under strong atmospheric turbulence conditions with 3.2 times faster training time than all electronic convolutional neural network.
The monolithic integration of photonic and electronic technology can be used to create miniaturized implantable microsystems capable of high-resolution optical neural control and electrical recording in deep brain regions.
We posit that inconsistent interpretations of experimental data have led to inaccurate claims on metalens focusing efficiencies. By performing a meta-analysis, we show that extraordinary claims of high focusing efficiency at high numerical apertures are, unfortunately, not yet backed by rigorous simulation or experimental results.
Whether Anderson localization of light is possible in three dimensions has long been an open question. Numerical calculations have now shown that it can be done with a disordered arrangement of metal particles.