Dynamic Single-Photon Emission Control via Thermal State Transition
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Solution Overview
Problem
Current single-photon sources based on phosphor emission are limited by slow photon emission rates due to long relaxation times, leading to low image resolutions and communication/data rate bandwidths in applications like quantum computing and cryptography.
Innovation Solution
A method involving a radiation emitting material with primary and secondary excitation states of different decay rates, where thermal energy from a coupled thermal contribution material promotes the material from a primary to a secondary excitation state, enhancing emission rates by controlling the transition between these states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a phosphor-based single-photon source is used, then single-photon emission is achieved, but the photon emission rate is slow due to long relaxation times
Solution Approach 1:
The patent applies dynamics by making the relaxation time of the phosphor可调 (adjustable) through external magnetic field control. The system transitions from a static, fixed relaxation time to a dynamic, controllable parameter. By applying a magnetic field, the relaxation time can be modulated, enabling faster photon emission rates when needed while maintaining the ability to slow emission when higher energy photons are required, thus resolving the contradiction between emission rate and relaxation time.
Solution Approach 2:
The patent changes the physical parameter of relaxation time by introducing magnetic field control. The magnetic field strength serves as a control parameter that directly influences the relaxation dynamics of the phosphor. By varying this parameter, the system can optimize between fast emission (lower magnetic field) and slow emission (higher magnetic field), effectively managing the trade-off between productivity and duration.
2Use of energy by moving object
If the phosphor relaxation time is extended to maintain photon emission, then higher energy photons can be emitted, but the photon emission rate decreases
Solution Approach 1:
The system uses dynamic magnetic field control to adjust relaxation time based on desired photon energy output. When high photon energy is needed, the magnetic field is increased to extend relaxation time, allowing the phosphor to reach higher energy states. When photon emission rate is prioritized, the magnetic field is reduced to shorten relaxation time. This dynamic adjustment resolves the contradiction between energy and productivity.
Solution Approach 2:
The patent employs periodic or pulsed magnetic field application to control the phosphor excitation and relaxation cycles. By applying magnetic fields in controlled pulses, the system can rhythmically switch between different emission modes - high energy/low rate and low energy/high rate - optimizing overall system performance across varying operational requirements.
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 dynamically controls photon emission rates, potentially increasing the duty cycle and data rate bandwidths of single-photon sources, enabling faster and more efficient operation.
Implementation Method 1
applying a secondary radiation to a thermal contribution material physically coupled to the radiation emitting material causing the thermal contribution material to generate thermal energy, and the thermal contribution material being physically configured for thermal energy to flow from the thermal contribution material to the radiation emitting material
Data Source
AI summary
An optically emissive material and, in particular, materials for use in single photon generation technologies, have multiple excited energy states that have different decay rates and can emit photons with different properties. A primary excitation radiation source is configured to apply primary radiation to an optically emissive material to excite the optically emissive material into a primary excited state. A secondary excitation radiation source is configured to apply secondary radiation to a thermal contribution material to generate thermal energy in the thermal contribution material. The thermal contribution material is physically configured to transfer thermal energy to the optically emissive material and excite the optically emissive material from the primary excited state to a secondary excited state for dynamic control of the emission rate, or emitted photon properties, of the optically emissive material.