Terahertz Measuring Device Using Pulsed Laser Beam Splitting
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Solution Overview
Problem
Conventional terahertz pulsed beam measuring devices have insufficient detection sensitivity and accuracy, particularly in applications such as drug development, where improved detection capabilities are needed.
Innovation Solution
A measuring device that uses a pulsed electromagnetic wave, featuring a substance detecting plate with a semiconductor and insulator, a pulsed laser beam splitter, and a detecting mechanism to radiate and detect pulsed electromagnetic waves, allowing for high sensitivity and precision in detecting substances by splitting the laser beam into probe and pump beams and adjusting their timing for accurate amplitude intensity measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional terahertz pulsed beam measuring devices are used, then measurement of substance changes can be performed, but detection sensitivity and accuracy are insufficient
Solution Approach 1:
The pulsed laser beam is divided into multiple beams (probe beam and pump beam) that are radiated onto different regions (detected region and reference region) of the semiconductor. This segmentation allows simultaneous measurement of sample and reference, enabling differential detection that significantly improves detection sensitivity and accuracy by canceling out common-mode noise and drift.
Solution Approach 2:
A reference region on the semiconductor serves as an intermediary for comparison. By radiating pump beams onto both the detected region (with substance) and the reference region (without substance or with different substance), the system can differential detect the amplitude intensities, thereby isolating the signal from the substance of interest and improving measurement precision.
2Device complexity
If a single detecting means is used, then device complexity is reduced, but detection precision is compromised
Solution Approach 1:
Instead of using multiple detecting means in one dimension, the invention spatially separates the pump beam irradiation locations into different regions (detected region and reference region) on the semiconductor while using a single detecting means. The time dimension is utilized by sequentially radiating pump beams and detecting the emitted electromagnetic waves, achieving differential measurement without multiple detectors.
Solution Approach 2:
The system creates a reference copy of the measurement process by radiating a pump beam onto a reference region that mirrors the detected region's structure but lacks the substance of interest. By comparing the signal from the detected region with the reference copy, the system can subtract background noise and improve detection accuracy while using only one detector.
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 device significantly enhances detection sensitivity and accuracy, enabling precise measurement of substance changes in solutions, particularly in drug development and other applications requiring high precision.
Implementation Method 1
a means configured to radiate a pulsed laser beam onto the substance detecting plate from a side of the semiconductor to generate a pulsed electromagnetic wave with an amplitude intensity depending on an amount of a detection object substance
Implementation Method 2
a detecting means configured to detect the amplitude intensity of the pulsed electromagnetic wave
Data Source
AI summary
Provided are a measuring device and a measuring method that use terahertz light, by which a substance to be detected can be detected with high sensitivity and high accuracy. A measuring device using a pulsed electromagnetic wave is provided with a substance detection plate, a means for generating the pulsed electromagnetic wave having amplitude intensity dependent on the amount of a substance to be detected at an irradiation position by irradiating the substance detection plate with a pulsed laser beam, and a detection means for detecting the amplitude intensity of the pulsed electromagnetic wave, and measures the change of the state of a solution containing the substance to be detected on the basis of the amplitude intensity.