Amorphous Molecular White-Light Emitter via Infrared Laser
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Solution Overview
Problem
Current technologies lack a material or device that can efficiently transform low-cost, compact laser diodes or other monochromatic light sources into white light, which is essential for various applications requiring high-brilliance and directional illumination.
Innovation Solution
A directional molecular white-light emitter is developed using a specially designed amorphous material composed of symmetry-free, diamondoid-like cluster molecules with inorganic nanocrystals coated with organic ligands, driven by a low-power continuous-wave infrared laser diode, enabling broadband white-light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If phosphors are used to convert UV emission into visible light, then energy efficiency is improved, but the emission becomes omnidirectional with large etendue
Solution Approach 1:
The patent uses a nonlinear optical medium as an intermediary to convert monochromatic laser light into broadband white light through nonlinear optical processes. This mediator enables spectral broadening while preserving the directional emission characteristics of the input laser, resolving the contradiction between energy efficiency and directional control.
Solution Approach 2:
The invention changes the optical parameters of the light by using nonlinear optical effects to transform monochromatic light into broadband white light. This parameter transformation occurs while maintaining the directional emission properties, thus improving upon the omnidirectional emission limitation of phosphor-based systems.
2Illumination intensity
If nonlinear effects are used to generate broadband supercontinua, then spectral bandwidth is improved, but system size, price, and energy requirements increase
Solution Approach 1:
The patent employs inexpensive, compact laser diodes as the light source instead of expensive high-power lasers. The nonlinear optical medium is used in a simple configuration that eliminates the need for complex optical systems, thereby reducing system size and cost while achieving broadband supercontinuum generation.
Solution Approach 2:
The invention extracts the essential nonlinear optical function from complex laser systems and implements it using simple laser diodes combined with a nonlinear optical medium. This extraction removes unnecessary complexity while retaining the broadband generation capability.
3Illumination intensity
If high-power lasers are used to generate supercontinuum, then broadband emission is achieved, but cost and energy requirements increase
Solution Approach 1:
The patent replaces expensive high-power lasers with inexpensive, low-power laser diodes. The nonlinear optical medium enables efficient conversion of the low-power monochromatic input into broadband white light, dramatically reducing energy requirements while maintaining broadband emission capability.
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 provides a highly efficient, environmentally benign, and cost-effective solution for generating warm white light with superior beam divergence, suitable for replacing incandescent emitters in high-brilliance applications, while maintaining the directional characteristics of the driving laser.
Implementation Method 1
nonlinear processes cause the material to emit broadband white light
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2C
AI summary
The invention concerns a highly efficient molecular white-light emitter. The invention describes amorphous materials that emit a broadband spectrum of light upon irradiation with an infrared laser. Inorganic nanocrystals form the core of the material and are coated with organic ligands on the surface.