Photonic_Crystal_By_Anshika_Bhadoriya.pptx

This PowerPoint presentation contains a brief about photonic crystals.

1. Topic: PHOTONIC CRYSTALS Anshika Bhadoriya

2. Outline Applications and challenges Fabrication Why photonics crystals Types of photonics crystals Introduction

3. Introduction Photonic crystals are optical nanostructures in which the refractive changes periodically. They are periodic dielectric structures that are designed to form the energy band structure for photons, which either allow or forbids the propagation of electromagnetic waves of certain frequency ranges, making them ideal for light-harvesting applications

4. Types of Photonic Crystals There are three types of Photonic crystals One-Dimensional: Refractive Index varies in single direction Two-Dimensional : Refractive index varies in two directions Three-Dimensional : Refractive index varies in three directions

5. How does they occur??

6. Why Photonic crystals? Control of Light : Photonic crystals can control the propagation of light by creating bandgaps, which prevent certain wavelengths from passing through while allowing others. Miniaturization: They enable the miniaturization of optical components. By controlling the flow of light at a very small scale. High-Quality: Photonic crystals can form high-quality optical resonators, which are essential for lasers, sensors, and other optical devices requiring stable and efficient light confinement. Versatile Applications: Photonic crystals find applications across diverse fields, including telecommunications, sensing, imaging, quantum optics, and optoelectronics. Tunable Optical Properties: Some photonic crystals exhibit tunable optical properties that can be adjusted in real-time or in response to external stimuli. Nonlinear Optical Effects : Photonic crystals support various nonlinear optical effects, where the optical properties of the material depend on the intensity of the incident light.

7. Fabrication

8. How does photonics crystal work

9. Photonic Crystal Fibers Photonic crystal fibers guide light by corralling it within a periodic array of microscopic air holes that run along the entire fiber length. Largely through their ability to overcome the limitations of conventional fiber optics—for example, by permitting low-loss guidance of light in a hollow core—these fibers are proving to have a multitude of important technological and scientific applications spanning many disciplines. The result has been a renaissance of interest in optical fibers and their uses.

10. Applications Optical fiber communication: Photonic crystals can be used to manipulate and control the transmission of light in optical fibers. Optical sensors: Photonic crystals can be designed to interact with specific wavelengths of light, making them useful for creating highly sensitive sensors for detecting substances or changes in the environment. Photonic crystal lasers: Photonic crystal structures can be incorporated into laser cavities to create compact and highly efficient lasers with narrow linewidths. Non-Linear devices: Photonic crystals can enhance nonlinear optical effects, which are important in fields like laser spectroscopy, imaging, and quantum optics Solar cells : Photonic crystals can improve the efficiency of solar cells by trapping and directing light within the material.

11. Advantages and Challenges Challenges: Fabrication Precision Temperature Sensitivity Integration with Existing Technologies Advantages: Miniaturization and Integration Reduced Weight Selective Absorption/Reflection High-Quality Optical Devices Enhanced Light-Matter Interactions Nonlinear Optics

12. THANK YOU!!