Photonic Crystal Nanostructure Depth Control
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Solution Overview
Problem
Current light-emitting devices, particularly those using quantum dots, face limitations in achieving optimal emission efficiency and tailored optical properties for applications requiring specific color purity and directional control, such as in lighting and display technologies.
Innovation Solution
The development of a photonic crystal structure with a dielectric layer containing light-emitting nanostructure materials, where different sets of nanostructure materials are positioned at distinct depths within the layer, enhancing emission efficiency and allowing for tailored optical output by modulating the resonant wavelength and electric field interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If quantum dots are embedded in a photonic crystal structure, then emission efficiency is enhanced, but device complexity increases
Solution Approach 1:
The photonic crystal structure is segmented into multiple layers with quantum dots positioned at specific depths, allowing independent optimization of emission at different wavelengths and angles while maintaining overall system efficiency
Solution Approach 2:
Different regions of the photonic crystal structure are assigned different properties - specific depths contain quantum dots while other regions provide optical confinement, enabling localized enhancement of emission efficiency without uniformly increasing complexity throughout the entire device
2Adaptability or versatility
If multiple sets of nanostructure materials are positioned at different depths, then tailored optical output is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The photonic crystal structure is designed with predetermined depth positions for quantum dots based on simulated optimal locations, allowing manufacturers to place materials at these pre-calculated positions rather than requiring iterative optimization, thus reducing actual manufacturing precision requirements
Solution Approach 2:
The invention optimizes key parameters such as quantum dot size, composition, and depth position to achieve desired emission characteristics, allowing tolerance in manufacturing by compensating through parameter adjustments rather than requiring exact positional precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach results in significant increases in quantum dot emission, up to 8-fold enhancement for off-normal angles, and allows for controlled intensity and angular output, enabling improved light-emitting devices with enhanced performance and tailored lighting characteristics.
Implementation Method 1
a photonic crystal comprising a dielectric layer comprising therein one or more light-emitting nanostructure materials
Implementation Method 2
periodic variations of differing (e.g. relative higher and lower) refractive index materials that can provide effective contrast
Implementation Method 3
Photon-emitting devices that contain quantum dots are gaining importance for application in lighting and video display due to their high quantum efficiency
Implementation Method 4
one or more light-emitting nanostructure materials positioned at a first depth level of the dielectric layer
Implementation Method 5
a dielectric layer comprising first and second sets of light-emitting nanostructure materials at differing depths within the dielectric layer
Data Source
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AI summary
In one aspect, structures (10) are provided that comprise a photonic crystal comprising a dielectric layer (14) comprising therein one or more light-emitting nanostructure materials(16). In a further aspect, structures (10) are provided that comprise a dielectric layer (14) comprising first (16a) and second (16b) sets of light-emitting nanostructure materials (16a, b) at differing depths within the dielectric layer (14).