Quantum Emitter Fabrication Using Decelerated Ion Implantation
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Solution Overview
Problem
Current single-photon sources (SPEs) are limited by non-deterministic emission, broadened emission bandwidths, reduced coherence, and short stability times, requiring stringent temperature control, which restricts their use to specific environments and implementations.
Innovation Solution
A method involving the use of a multi-layer material flake with controlled ion implantation using a deceleration mask layer to fabricate single-photon emitters, ensuring deterministic performance, high output intensity, and narrow wavelength bandwidths, operable at room temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional single-photon emitters are used, then photon emission is achieved, but emission is non-deterministic and stability is short
Solution Approach 1:
The patent changes the physical and chemical parameters of the substrate by using ultra-high purity materials (99.999% purity) and controlled ion implantation dosages (1E12 to 1E14 ions/cm²) to create stable quantum emitters that maintain deterministic photon emission over extended periods without degradation
Solution Approach 2:
The patent creates a composite structure by implanting dopant ions (such as nitrogen, phosphorus, or sulfur) into high-purity semiconductor substrates (GaAs, InP, or ZnSe), forming a composite material system that combines the crystalline structure of the substrate with the quantum properties introduced by the dopants to achieve long-term stability
2Reliability
If doping and defects are used to generate single-photons, then emission is achieved, but structural incongruities occur in substrates
Solution Approach 1:
The patent precisely controls the ion implantation parameters including dosage (1E12 to 1E14 ions/cm²), energy (10-100 keV), and temperature (cryogenic temperatures during implantation) to create minimal structural disruption while achieving the desired quantum emitter density and maintaining substrate crystalline integrity
Solution Approach 2:
The patent applies preliminary annealing treatments and uses cryogenic temperatures during ion implantation to prevent structural damage before it can propagate, counteracting the potential harmful effects of ion bombardment on the substrate lattice structure
3Reliability
If common SPEs are used, then single-photon generation is achieved, but output emission intensity is reduced
Solution Approach 1:
The patent optimizes multiple parameters including ion implantation dosage, substrate purity, and post-implantation annealing conditions to maximize the quantum efficiency and radiative recombination rate of the created defects, resulting in enhanced emission intensity while maintaining single-photon generation capability
4Reliability
If stringent temperature control is applied, then device performance degradation is prevented, but device complexity increases
Solution Approach 1:
The patent creates quantum emitters with inherently stable properties through precise ion implantation and material selection that make the devices self-regulating and resistant to temperature-induced degradation, eliminating the need for active temperature control systems while maintaining performance stability
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
The method produces optically stable single-photon emitters with narrow wavelength bands, high luminosity, and long-term stability, enabling reliable operation across various environments.
Implementation Method 1
An ion beam source directs an ion beam at the exposed surface of the deceleration mask layer to decelerate ions of the ion beam, maximizing the stopping efficiency of the flake, in another word, increasing or maximizing the ion implantation efficiency.
Data Source
AI summary
A method and devices for fabricating optical emitters. The method includes disposing a flake of a multi-layer material onto a wafer. The wafer has an aperture over which a portion of the flake is disposed. The flake has a first surface partially in contact with the wafer, and a second surface opposite the first surface. The method further includes disposing a deceleration mask layer adjacent the flake. The deceleration mask layer has a flake-side surface adjacent to the flake, and an exposed surface opposite the flake-side surface. An ion beam is directed at the exposed surface of the deceleration mask layer to decelerate ions of the ion beam until at least a portion of the ions are implanted in the flake.