Photonic Crystal
Photonic Crystal - Related Videos
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Cited by 14 •
2012
Use of photonic crystal slow light waveguides and cavities has been widely adopted by the photonics community in many differing applications. Therefore fabrication and characterization of these devices are of great interest. This paper outlines our fabrication technique and two optical characterization methods, namely: interferometric (waveguides) and resonant scattering (cavities).
13:02
Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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Cited by 3 •
2017
We present a protocol for fabricating 1-D photonic crystal cavities on subwavelength diameter silica fibers (optical nanofibers) using femtosecond laser-induced ablation.
09:29
Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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2011
Plasmonic tweezers and photonic crystal nanostructures are shown to produce useful enhancements in the efficiency and orientation control of optically trapping micro- and nano-particles.
07:39
Protein Crystallization
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2023
Protein crystallization, obtaining a solid lattice of biomolecules, elucidates protein structure and enables the study of protein function. Crystallization involves drying purified protein under a combination of many factors, including pH, temperature, ionic strength, and protein concentration. Once crystals are obtained, the protein structure can be elucidated by x-ray diffraction and computation of an electron density model. This video introduces protein crystallization and shows a general...
13:38
Synthesis of Biocompatible Liquid Crystal Elastomer Foams as Cell Scaffolds for 3D Spatial Cell Cultures
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Cited by 9 •
2017
This study presents a methodology to prepare 3D, biodegradable, foam-like cell scaffolds based on biocompatible side-chain liquid crystal elastomers (LCEs). Confocal microscopy experiments show that foam-like LCEs allow for cell attachment, proliferation, and the spontaneous alignment of C2C12s myoblasts.
FAQs
Lattice geometry and material choice determine how strongly the refractive index varies from one repeating region to the next. Those parameters shape the resulting photonic band structure, including the frequencies excluded from propagation. Engineering these features allows a device to select particular wavelengths rather than affecting all light equally, supporting controlled filtering and wavelength-specific operation.
Defects and designed interfaces locally alter the otherwise repeating structure, creating selected locations where light can be confined, guided, or redirected. Their geometry and placement therefore determine which wavelengths interact with those features. In engineering, this provides a way to connect band-gap behavior with practical waveguides, resonant cavities, and routing functions.
The band gap separates propagation conditions by frequency. Light within the excluded range cannot travel through the periodic material, while engineered features can provide localized or guided behavior for selected wavelengths. This contrast gives designers a basis for wavelength selectivity, allowing compact structures to perform optical control without treating every wavelength identically.
Designing a photonic crystal requires coordinated choices of lattice geometry, constituent materials, and structural defects or interfaces. Engineers adjust these features to tune the band gap, wavelength response, confinement, and light-matter interaction. This parameter-based approach links the physical layout to the intended function, whether the target is filtering, guiding, sensing, or resonance in an integrated photonic device.
Photonic crystal structures support optical filters, waveguides, resonant cavities, sensors, and other components for integrated photonics. Filters can select wavelengths, waveguides can direct them, and cavities can confine selected optical behavior. Sensors use the structure’s wavelength-sensitive response, while integration benefits from the ability to place several optical functions within compact engineered systems.
Its periodic structure and engineered defects allow light control to occur within a designed material architecture rather than through larger separate optical components. By tuning geometry, materials, and interfaces, engineers can combine wavelength selectivity, guiding, confinement, and sensing functions. These capabilities support compact optical devices while improving control over performance and light-matter interactions.