Energy Conversion System Using Surface Phonon Polaritons
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Solution Overview
Problem
Conventional energy conversion systems face inefficiencies in up-converting energy from longer wavelengths to shorter wavelengths, as they require high energy pump excitation and population inversion, limiting the work that can be produced.
Innovation Solution
A method involving a material with specific energy state regions of high absorption and low emission at longer wavelengths, and high emission at shorter wavelengths, where energy is applied to occupy non-radiative states and then emitted at the high emissivity window, potentially using surface phonon polaritons to enhance energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional energy conversion systems use high energy pump excitation to achieve population inversion, then lasing action can be achieved, but the conversion efficiency from longer wavelengths to shorter wavelengths remains limited
Solution Approach 1:
The patent changes the fundamental parameter of energy conversion by eliminating the need for population inversion and high energy pump excitation. Instead, it uses a material with specific emissivity characteristics that directly converts long wavelength radiation to short wavelength radiation through thermal emission, achieving up to 70% conversion efficiency compared to conventional limited efficiency
Solution Approach 2:
The patent replaces the conventional laser mechanism (which requires population inversion and high energy pumping) with a thermal emission mechanism based on material emissivity properties. This substitution eliminates the need for high energy pump excitation and achieves more efficient wavelength conversion
2Power
If high energy pump excitation is used above the lasing photon energy, then population inversion is achieved, but the work output is limited by thermodynamic constraints
Solution Approach 1:
The patent converts the previously harmful thermal energy loss into a beneficial mechanism by using the material's emissivity properties to directly emit short wavelength radiation from absorbed long wavelength radiation. This transforms what was previously waste heat into useful work, significantly increasing power output relative to pump energy input
3Loss of energy
If conventional mechanisms are used for parametric up-conversion, then wavelength conversion occurs, but the efficiency becomes negligible
Solution Approach 1:
The patent extracts and utilizes the material's inherent emissivity properties as the primary conversion mechanism, eliminating the need for complex parametric conversion processes. By focusing on the material's natural thermal emission characteristics, it achieves simple yet highly efficient wavelength conversion
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 enables efficient up-conversion of energy from longer wavelengths to shorter wavelengths with improved efficiency, potentially exceeding traditional conversion limits by utilizing entropy-driven mechanisms and surface phonon polaritons for energy transfer.
Implementation Method 1
Typical materials, when heated emit energy at wavelengths distributed in a manner dependent on their emissivity. An ideal material will emit radiation, when heated, at wavelengths corresponding to those of a black body.
Implementation Method 2
said applying comprises transferring energy to surface phonon polaritons at said first and second regions, thereby increasing a density of populated energy states of said material at said first and second regions
Data Source
AI summary
A method of emitting photons at a desired wavelength, including: providing a material having a first region of high absorption of radiation at a first set of wavelength of radiation, contiguous with a second region of low absorption of radiation at a shorter set of wavelengths, and a third region of high emission at a further shorter set of wavelengths; applying energy to the material at the first region, such that most of an effective black body radiation of said material at a temperature of the material would fall within the second region and be configured to transfer energy to said third region and not overlap with the first region; and emitting energy from the material at the third region, powered by said applying energy.