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Related Concept Videos

Structures of Solids02:22

Structures of Solids

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Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
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Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
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Microcavities with suspended subwavelength structured mirrors.

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    We demonstrate a novel microcavity design using structured mirrors. This design enables single-mode operation with a narrower linewidth, paving the way for advanced optical sensing and optomechanics.

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    Area of Science:

    • Optics
    • Nanotechnology
    • Materials Science

    Background:

    • Microcavities are crucial for various optical applications.
    • Structured mirrors, like photonic crystals, offer unique optical properties.
    • Existing microcavities face limitations in mode control and linewidth.

    Purpose of the Study:

    • To investigate the optical properties of microcavities with suspended subwavelength structured mirrors.
    • To explore the regime where microcavity free-spectral range exceeds Fano resonance width.
    • To enable the realization of high quality factor and small mode volume microcavities.

    Main Methods:

    • Utilizing microcavities with high-contrast gratings or 2D photonic crystal slabs as mirrors.
    • Focusing on the interference effects in a Fabry-Perot resonator with wavelength-dependent mirrors.
    • Analyzing the transmission spectrum in a specific operational regime.

    Main Results:

    • Achieved single-mode transmission spectra in the microcavity.
    • Observed significantly narrower linewidths compared to conventional cavities.
    • Demonstrated a generic interference effect exploitable in Fabry-Perot resonators.

    Conclusions:

    • The investigated microcavity design allows for precise control over optical modes.
    • This approach is promising for creating high-performance microcavities.
    • Potential applications include optomechanics and advanced optical sensing using suspended structured thin films.