Micro-Optical Filters

Solgaard, Olav

doi:10.1007/978-0-387-68351-5_13

Cited by 4 publications

(5 citation statements)

References 20 publications

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“…The substrate beneath the crystal is removed to allow large out-of-plane oscillations and to allow the transmission of X-rays. The excitation is provided by in-plane comb-drive actuators, which are inter-digitated capacitors that provide torque with high force density 1 21 (see Supplementary Data 1 and Supplementary Fig. 1 ).…”

Section: Resultsmentioning

confidence: 99%

“…Devices based on microelectromechanical systems (MEMS) when combined with micro-optics have found a wide range of photonics applications. These include high-resolution imaging and displays 1 , biomedical diagnostics and bioimaging 2 3 , and optical communications 4 5 , all of which rely on the ability of the device to control the temporal and spectral shape of light pulses. Most MEMS use silicon as the structural material that act as mirrors, gratings and lenses to perform device functions such as microfocusing, high-speed modulation, beam-splitting, spectral filtering, wavelength dispersion, waveguiding and scanning.…”

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confidence: 99%

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X-ray photonic microsystems for the manipulation of synchrotron light

et al. 2015

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Photonic microsystems played an essential role in the development of integrated photonic devices, thanks to their unique spatiotemporal control and spectral shaping capabilities. Similar capabilities to markedly control and manipulate X-ray radiation are highly desirable but practically impossible due to the massive size of the silicon single-crystal optics currently used. Here we show that micromechanical systems can be used as X-ray optics to create and preserve the spatial, temporal and spectral correlation of the X-rays. We demonstrate that, as X-ray reflective optics they can maintain the wavefront properties with nearly 100% reflectivity, and as a dynamic diffractive optics they can generate nanosecond time windows with over 100-kHz repetition rates. Since X-ray photonic microsystems can be easily incorporated into lab-based and next-generation synchrotron X-ray sources, they bring unprecedented design flexibility for future dynamic and miniature X-ray optics for focusing, wavefront manipulation, multicolour dispersion, and pulse slicing.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

X-ray photonic microsystems for the manipulation of synchrotron light

et al. 2015

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“…Interdigitated HB probes have been used to map elastic moduli of polymer materials in air and in liquid . Compared to torsional probes, interdigitated probes are less constrained in terms of mechanical design and are about 1 order of magnitude more sensitive optically . Here, we extended this approach to demonstrate a new capability for imaging cytoskeletal organization in fixed and live cells.…”

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confidence: 99%

Fast Stiffness Mapping of Cells Using High-Bandwidth Atomic Force Microscopy

et al. 2015

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The cytoskeleton controls cellular morphology and mediates the mechanical interactions between a cell and its environment. Atomic force microscopy (AFM) has the unique capability to map cytoskeletal mechanics and structures with nanometer resolution. However, whole–cell cytomechanical imaging with conventional AFM techniques is limited by low imaging speed. Here we present fast nanomechanical mapping of cells using high–bandwidth AFM (HB–AFM), where >106 nanoindentation measurements were acquired in ~10 min—a task that would take weeks to finish using conventional AFM. High bandwidth measurements enabled capture of the entire tip–sample interaction for each tap on cells, engendering a new measurement (“force phase”) that exceeds the contrast of conventional tapping mode, and enabling spectral visualization of >10 harmonics. The abundance of measurements allowed discovery of subtle cytomechanical features, including the stiffness of fibers of the cellular spectrin network in situ. This approach bridges HB–AFM and high–harmonic imaging, and opens future opportunity towards dynamic mechanical properties of living cells.

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“…A reflective-mode metalens has been successfully integrated onto a high-speed MEMS scanner through the collaboration between Capasso’s group at Harvard University and Lopez’s group at the Argonne National Lab [47] for lateral beam scanning. Actuated by staggered comb-drives, the 2D MEMS scanner offers fast speed beam steering, high-resolution imaging, and high optical efficiency [48]. The fabricated metasurface lens was on a square substrate with side 0.8 mm and has a focal length of 5 mm with incident light 45° away from the surface, shown in Figure 8a.…”

Section: Advanced Techniques For Metasurface-based Lensesmentioning

confidence: 99%

Metalens-Based Miniaturized Optical Systems

Piyawattanametha

Qiu

2019

Micromachines

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Metasurfaces have been studied and widely applied to optical systems. A metasurface-based flat lens (metalens) holds promise in wave-front engineering for multiple applications. The metalens has become a breakthrough technology for miniaturized optical system development, due to its outstanding characteristics, such as ultrathinness and cost-effectiveness. Compared to conventional macro- or meso-scale optics manufacturing methods, the micro-machining process for metalenses is relatively straightforward and more suitable for mass production. Due to their remarkable abilities and superior optical performance, metalenses in refractive or diffractive mode could potentially replace traditional optics. In this review, we give a brief overview of the most recent studies on metalenses and their applications with a specific focus on miniaturized optical imaging and sensing systems. We discuss approaches for overcoming technical challenges in the bio-optics field, including a large field of view (FOV), chromatic aberration, and high-resolution imaging.

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Micro-Optical Filters

Cited by 4 publications

References 20 publications

X-ray photonic microsystems for the manipulation of synchrotron light

X-ray photonic microsystems for the manipulation of synchrotron light

Fast Stiffness Mapping of Cells Using High-Bandwidth Atomic Force Microscopy

Metalens-Based Miniaturized Optical Systems

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