Related Experiment Video
Updated: Jun 22, 2026
10:35
Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
Published on: September 26, 2014
Color separating with integrated photonic bandgap optical diodes: a numerical study
Optics Express
|June 17, 2009
Summary
Researchers developed an optical diode using chiral photonic crystals. This device enables non-reciprocal light transmission and functions as a color splitter, advancing optical component technology.
Area of Science:
- Photonics
- Materials Science
- Optics
Background:
- Chiral photonic crystals exhibit unique photonic band-gap (PBG) properties.
- Optical diodes are crucial components for controlling light propagation.
- Non-reciprocal transmission is a key characteristic for diode functionality.
Purpose of the Study:
- To present an optical diode (OD) based on chiral photonic crystals.
- To explore the application of this OD in a color-separating system.
- To investigate the non-reciprocal transmission properties of the device.
Main Methods:
- Constructing an optical diode using wave-plates and cholesteric liquid crystals with varying pitches.
- Analyzing the polarization sensitivity and anisotropic transmission of the component.
- Investigating light transmission within different photonic band-gap regions.
Main Results:
- Demonstrated an optical diode with passive anisotropic transmission, analogous to electronic diodes.
- Observed non-reciprocal transmission of linearly polarized light.
- Proposed a novel color-separating system utilizing the optical diode's functionality.
Conclusions:
- The developed optical diode effectively utilizes photonic band-gap properties of chiral photonic crystals.
- The device exhibits diode-like behavior for polarized light, enabling non-reciprocal transmission.
- The optical diode serves as a viable mechanism for color splitting applications.
Related Concept Videos
01:14Modeling of Diode Reverse Characteristics
In electronic circuits, reverse-biased diode configurations are critical for regulating voltage levels. Zener diodes exploit the reverse breakdown phenomenon and exhibit a controlled breakdown at a specific Zener voltage (VZ). They are designed to maintain a constant voltage across their terminals and are commonly used for voltage regulation in circuits.
When a reverse voltage applied to a Zener diode exceeds its breakdown voltage, the diode enters the breakdown region. At this point, the...
When a reverse voltage applied to a Zener diode exceeds its breakdown voltage, the diode enters the breakdown region. At this point, the...
01:19Modeling of Diode Forward Characteristics
Understanding the behavior of diodes when forward-biased is a fundamental aspect of electronic circuit design and analysis. This analysis primarily utilizes two models: the exponential diode model and the constant-voltage-drop model. The exponential model comes into play when the source voltage exceeds 0.5 volts, pushing the diode current to rise exponentially above the saturation current. This relationship is graphically depicted in the current-voltage (I-V) curve, illustrating the diode's...
01:16Biasing of P-N Junction
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...