Double Resonator Single Photon Source
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for generating single photons with predetermined properties are theoretical and have not been practically realized, lacking a practical single-photon source that can simultaneously control wavelength, pulse width, and polarization.
Innovation Solution
A device comprising an active medium that can be excited to a biexciton state, a double resonator with two coupled resonator modes, where one mode is tuned to the stimulation light wavelength and the other to the desired single photon emission wavelength, allowing for the generation of single photons with adjustable properties using a stimulation light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single resonator is used to generate single photons, then the device complexity is reduced, but the manufacturing precision and control over wavelength, pulse width, and polarization cannot be achieved
Solution Approach 1:
The single resonator is divided into two coupled resonators, each responsible for different functions: one resonator controls the wavelength and polarization of the emitted photons, while the other controls the pulse width. This segmentation allows independent optimization of each parameter without increasing overall system complexity significantly.
Solution Approach 2:
The invention transitions from a one-dimensional single resonator system to a two-dimensional coupled resonator system, where the additional dimension enables simultaneous control of multiple photon properties (wavelength, polarization, and pulse width) that cannot be controlled in the single resonator configuration.
2Manufacturing precision
If high laser power is used to generate single photons with predetermined properties, then the manufacturing precision of photon properties is improved, but the use of energy increases significantly
Solution Approach 1:
The invention changes the operational parameters of the resonator system by introducing coupling between two resonators with different quality factors. This allows the system to achieve high precision photon property control at lower laser power levels by utilizing the resonant enhancement effects of the coupled resonator system, rather than relying on high power alone.
Solution Approach 2:
The coupled resonator system acts as an intermediary that mediates between the input laser and the emitted photons. The resonators store and amplify the optical field, enabling efficient energy transfer and precise photon property control without requiring proportionally high input laser power.
3Use of energy by moving object
If the resonator quality factor is increased to reduce laser power requirements, then the use of energy is reduced, but the device complexity and manufacturing precision requirements increase
Solution Approach 1:
The high quality factor requirements are segmented between two resonators with different quality factors. One resonator can have a higher Q-factor for wavelength and polarization control, while the other has a lower Q-factor for pulse width control, reducing the overall manufacturing precision burden compared to a single high-Q resonator system.
Solution Approach 2:
Different parts of the resonator system have different quality factors optimized for their specific functions. The resonator responsible for wavelength control has higher Q-factor requirements, while the resonator for pulse width control has lower Q-factor requirements, allowing localized optimization rather than uniform high precision across the entire system.
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
Enables the practical generation of single photons with controlled wavelength, pulse width, and polarization, reducing the required laser power by the quality factor of the resonator, making the process more feasible and efficient.
Implementation Method 1
a stimulation light source, which is designed and arranged to irradiate the active medium with stimulation light and thus to generate a virtual state based on the generated biexciton, from which the single photon can be emitted
Implementation Method 2
the device further comprises a double resonator in which the active medium is arranged, wherein the double resonator has two coupled resonator modes, wherein the first resonator mode is tuned to a wavelength of the stimulation light source and wherein the second resonator mode is tuned to a desired wavelength of the emitted single photon
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to a device (100) and a method for generating a single photon emission.The device (100) comprises: - an active medium (1) that can be excited to a biexciton state; - an excitation source (5a; 5b) designed to generate a biexciton (|XX〉) based on the active medium (1); - a stimulation light source designed and arranged to irradiate the active medium (1) with stimulation light (9) and thus generate a virtual state (8) based on the generated biexciton (|XX〉) from which the single photon (13) can be emitted; wherein the device further comprises a double resonator (50) in which the active medium (1) is arranged, wherein the double resonator (50) has two coupled resonator modes (60, 70), wherein the first resonator mode (60) is tuned to a wavelength of the stimulation light source and wherein the second resonator mode (70) is tuned to a desired wavelength of the emitted single photon (13).