Quantum Diode High-Frequency Rectification via Tunneling
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Solution Overview
Problem
Existing quantum diodes for converting alternating current to direct current, such as Schottky and MIM diodes, face issues like energy absorption leading to heating, complex structures, and high production costs, especially when operating at high frequencies like THz band.
Innovation Solution
A quantum diode design featuring a first conductive metal layer, an electrically insulating layer, and a second conductive metal layer, where the layers form specific angles and thicknesses to facilitate electron tunneling without physical crossing of the insulating layer, allowing efficient high-frequency rectification with reduced heat dissipation and simpler production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a Schottky diode with metal-semiconductor junction is used for rectification, then alternating current can be transformed into direct current, but energy is absorbed by the junction causing heating of the diode
Solution Approach 1:
The patent replaces the traditional mechanical/physical contact junction (metal-semiconductor interface) with a quantum tunneling mechanism through an insulating layer. Electrons tunnel through the potential barrier of the insulator rather than physically crossing a junction interface, eliminating the heating problem associated with junction resistance while maintaining rectification functionality.
Solution Approach 2:
The insulating layer acts as an intermediary between the two metal layers, enabling electron transport through quantum tunneling rather than direct contact. This intermediary structure allows the diode to function without the energy loss and heating that occurs at metal-semiconductor junctions, as the insulator prevents direct energy dissipation at an interface.
2Reliability
If a MIM diode structure is used for quantum tunneling, then rectification can be achieved, but the structure becomes complex and production becomes difficult
Solution Approach 1:
The patent introduces asymmetry by using different metal materials for the first and second conductive layers (e.g., aluminum for the first layer and gold for the second layer). This asymmetric configuration enables effective rectification by creating different tunneling probabilities for forward and reverse bias conditions, while maintaining a relatively simple three-layer structure that is easier to manufacture than symmetric MIM designs.
3Reliability
If a MIIM diode structure is used for quantum tunneling, then rectification can be achieved, but greater polarization is necessary requiring a power supply unit
Solution Approach 1:
The patent replaces the need for high polarization voltages (mechanical/electrical forcing) with a quantum tunneling mechanism that operates at lower voltages. The tunneling effect allows electrons to pass through the insulating barrier without requiring the high electric fields needed in MIIM structures, eliminating the need for additional power supply units while maintaining effective rectification.
4Productivity
If traditional junction diodes are used for high frequency rectification, then alternating current transformation can be achieved, but heat dissipation increases and efficiency decreases
Solution Approach 1:
The patent replaces the physical charge carrier movement across a junction (which generates heat due to resistance) with quantum tunneling through an insulating layer. This substitution enables high-frequency operation with minimal energy loss, as tunneling is a quantum mechanical process that does not involve the same resistive heating mechanisms as traditional junction diodes, thereby improving both switching speed and reducing heat dissipation.
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 quantum diode achieves high-speed switching and efficient energy conversion with minimal heat dissipation and lower production costs, capable of operating in the THz band, outperforming traditional junction diodes.
Implementation Method 1
a quantity of electrons moves from said first conductive metal layer to said second conductive metal layer, jumping, by tunnel effect, said electrically insulating layer
Data Source
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Figure 3
AI summary
The present invention refers to a quantum diode for transforming an alternating current, in particular a high frequency alternating current, into a direct current, comprising: a first conductive metal layer (1) behaving as a first electrode, an electrically insulating layer (7), a second conductive metal layer (2) and a third conductive metal layer (3) behaving as a second electrode. The first conductive metal layer (1) and the second conductive metal layer (2) are respectively made of a first metal material and a second metal material, different from the first metal material, and are separated from said electrically insulating layer (7) having a thickness between 1,5nm and 5nm. The quantum diode is configured to transform an alternating current into a direct current on the basis of a movement of electrons which, by tunnel effect, move from the first electrode to the second electrode jumping the electrically insulating layer, in correspondence with a first contact line (L1) between two surfaces (1A, 1C) of the first metal layer conductor (1).