Terahertz Detection Sensor With Electric Field Enhancement
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Solution Overview
Problem
Current non-destructive methods for monitoring the state of packaged products during transportation have low sensitivity, making it difficult to detect small physical, chemical, or biological changes, such as food poisoning bacteria, which can lead to inaccurate and delayed detection.
Innovation Solution
A terahertz wave-based system that includes a terahertz wave transmission layer, an electric field enhancement structure, and a selective detection layer to enhance sensitivity for detecting changes within packaging containers, allowing for real-time, non-destructive monitoring of physical, chemical, and biological changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If infrared camera or millimeter wave is used to measure surface temperature, then non-destructive monitoring is achieved, but detection sensitivity is very low and cannot detect small physical/chemical/biological changes
Solution Approach 1:
The patent changes the detection parameter from visible light/infrared to terahertz waves, which have different interaction characteristics with matter. This parameter change enables the detection of small physical/chemical/biological changes that are invisible to conventional infrared cameras, thereby improving measurement precision while maintaining non-destructive monitoring capability
Solution Approach 2:
The patent replaces the conventional infrared detection system with a terahertz wave detection system. This substitution enables direct detection of molecular vibrations and rotational transitions in the terahertz frequency range, providing much higher detection sensitivity for biological substances like bacteria compared to the thermal-based infrared method
2Loss of information
If barcode is used for identification, then information encoding is achieved, but large amount of information cannot be encoded in limited space and visual checking is possible
Solution Approach 1:
The patent changes the identification method from visual barcode patterns to terahertz wave-based optical identification. By encoding information in terahertz frequency characteristics rather than spatial patterns, the system can encode much larger amounts of information in a limited area that is invisible to the human eye, thereby increasing information density without requiring more space
Solution Approach 2:
The patent transitions from two-dimensional spatial encoding (barcode patterns) to frequency-domain encoding (terahertz wave characteristics). This dimensional change from space to frequency allows for vastly increased information capacity within the same physical area, as frequency modulation provides a different encoding dimension that is not constrained by spatial resolution
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 enables accurate and timely detection of changes within packaging containers, improving the sensitivity of monitoring and allowing for the detection of small changes, such as the presence of harmful bacteria, thereby enhancing product safety.
Implementation Method 1
an electric field enhancement structure that enhances an electric field by reacting with a predetermined frequency band of terahertz waves passing through the terahertz wave transmission layer
Implementation Method 2
A terahertz wave-based system that includes a terahertz wave transmission layer, an electric field enhancement structure, and a selective detection layer to enhance sensitivity for detecting changes within packaging containers
Data Source
AI summary
A wrapper for a terahertz wave according to an embodiment of the present invention includes: a terahertz wave transmission layer that is made of a material that transmits a terahertz wave; and an electric field enhancement structure that enhances an electric field by reacting with a predetermined frequency band of terahertz waves passing through the terahertz wave transmission layer. An optical identification device for a terahertz wave according to an embodiment of the present invention includes m identification units composed of: a terahertz wave transmission layer that is made of a material that transmits a terahertz wave; and a waveguide grating that resonates at a natural resonant frequency when receiving the transmitted terahertz wave, in which the natural resonant frequency is any one of a first natural resonant frequency to an n-th natural resonant frequency.