Photonic crystals play a crucial role in biophotonics and optical biosensors by manipulating light at various dimensions. From one-dimensional Bragg mirrors to three-dimensional opal structures, these materials enhance sensor performance and enable advanced imaging techniques in biological applications.
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One-dimensional photonic crystals (Bragg mirrors)
- Composed of alternating layers of materials with different refractive indices.
- Reflect specific wavelengths of light due to constructive interference.
- Used in optical coatings and laser cavities to enhance performance.
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Two-dimensional photonic crystals
- Structured in a periodic pattern in two dimensions, affecting light propagation.
- Can create photonic band gaps, preventing certain wavelengths from passing through.
- Applications include waveguides and optical devices for controlling light.
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Three-dimensional photonic crystals (opal structures)
- Feature a periodic arrangement in three dimensions, resembling natural opals.
- Capable of manipulating light in all directions, leading to unique optical properties.
- Useful in applications like sensors and advanced imaging systems.
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Inverse opal photonic crystals
- Formed by creating a template of opal structures and filling it with a different material.
- Exhibit tunable photonic band gaps based on the filling material and structure.
- Employed in sensors and as substrates for enhanced light-matter interactions.
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Colloidal photonic crystals
- Made from self-assembled colloidal particles, creating a periodic structure.
- Can be easily fabricated and modified for specific applications.
- Used in sensors, displays, and as structural colors in materials.
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Silicon-based photonic crystals
- Utilize silicon as the primary material, leveraging its compatibility with existing semiconductor technology.
- Enable integration with electronic components for photonic applications.
- Important for developing optical circuits and advanced communication systems.
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Polymer-based photonic crystals
- Constructed from polymer materials, offering flexibility and ease of fabrication.
- Can be engineered for specific optical properties and applications.
- Used in sensors, displays, and lightweight optical devices.
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Liquid crystal photonic structures
- Combine liquid crystals with photonic crystal designs to create tunable optical properties.
- Allow for dynamic control of light through external stimuli (e.g., electric fields).
- Applications include displays, optical switches, and tunable filters.
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Photonic crystal fibers
- Optical fibers that incorporate a photonic crystal structure to guide light.
- Can achieve unique light propagation characteristics, such as endlessly single-mode behavior.
- Used in telecommunications, sensing, and nonlinear optics.
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Defect-mode photonic crystals
- Introduce intentional defects in the periodic structure to create localized states.
- Enable enhanced light-matter interactions and can be used for sensing applications.
- Useful in developing devices like lasers and sensors with improved performance.