Schottky Contact Rasterization for Terahertz Detector Arrays
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Solution Overview
Problem
Traditional terahertz detectors based on Schottky barrier diodes with antennas suffer from low gain, large area, and high cost, hindering the development of terahertz detection and imaging technology.
Innovation Solution
An N×M terahertz detector array imaging system utilizing a Schottky contact grating structure, comprising detector units with Schottky barrier diodes, NMOSFETs, and a readout circuit, which eliminates the need for antennas by enhancing plasma resonance through a grated structure, allowing for low-cost, high-performance detection and imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional antennas are used in Schottky barrier diode detectors, then the detectors can receive terahertz waves, but the antenna area becomes large and gain becomes low, resulting in poor detector performance and high cost
Solution Approach 1:
The patent extracts and eliminates the antenna component from the traditional Schottky barrier diode detector structure. By removing the antenna, the design directly addresses the problem of large area and low gain associated with traditional antenna-based detectors, achieving compact integration while maintaining terahertz detection functionality through the Schottky barrier diode's inherent properties
Solution Approach 2:
The Schottky barrier diode is designed to perform multiple functions: it serves as both the detection element and the resonant structure for terahertz wave reception. This multi-functionality eliminates the need for separate antenna components, achieving both compact area and effective terahertz detection without requiring additional dedicated antenna structures
2Reliability
If traditional antennas are used in Schottky barrier diode detectors, then the detectors can receive terahertz waves, but the antenna gain becomes low, resulting in poor detector performance
Solution Approach 1:
By removing the antenna component, the patent eliminates the source of low gain performance. The Schottky barrier diode itself is designed to directly interact with terahertz waves, achieving effective detection without the performance limitations of traditional antenna structures
Solution Approach 2:
The patent modifies the operating parameters and structural characteristics of the Schottky barrier diode to optimize its response to terahertz waves. By adjusting the diode's electrical and geometric parameters, the system achieves high detection sensitivity and effective gain without relying on separate antenna structures
3Reliability
If Schottky barrier diodes with rasterization structure are used, then detection sensitivity is enhanced and chip area is reduced, but the device complexity increases due to additional circuit components
Solution Approach 1:
The detector array is segmented into multiple independent detector units, each with its own Schottky barrier diode and associated circuitry. This segmentation allows for modular design and independent optimization of each unit's performance while maintaining overall system functionality, balancing complexity with enhanced detection capability
Solution Approach 2:
The patent introduces intermediary circuit components such as amplifiers and switches that mediate between the Schottky barrier diode and the readout circuit. These intermediary elements enhance the detection sensitivity by conditioning the signal from the diode, while their modular nature helps manage the overall device complexity through standardized interfaces
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 system achieves improved detection sensitivity and reduces production costs by eliminating antenna-related issues, enabling monochromatic or multicolor array imaging and facilitating the development of low-cost, high-performance terahertz cameras and imagers.
Implementation Method 1
enhancing plasma resonance
Data Source
AI summary
The present disclosure discloses an N×M terahertz detector array imaging system based on a Schottky contact rasterization structure. The rasterization is introduced into the Schottky barrier diode, so that the rasterized Schottky contact resonates with the terahertz waves, the plasma resonance effect is enhanced, and the detection sensitivity of the array unit can be further improved. Moreover, there is no need to use an antenna, which can effectively avoid the problems such as large loss of the on-chip antenna, low gain efficiency, and difficulty in verifying through DRC design rules; and the chip area is greatly reduced, which greatly reduces the production cost. Finally, by adjusting the rasterization structure parameters of the array detector unit during the design process, the detector array can realize monochromatic array imaging or multicolor array imaging, which provides a new solution for the realization of low-cost, high-performance terahertz array cameras and terahertz imagers.