Plasmon Measurement System Using Optical Excitation and Electron Detection
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Solution Overview
Problem
Current methods for investigating plasmons and plasmon-polaritons are limited in their ability to provide a comprehensive analysis of these phenomena and their properties, due to technological feasibility and physical limits.
Innovation Solution
A measurement system and method that combines an excitation-beam to excite plasmons in a sample, and a probing radiation or field to obtain information about the sample's interaction, allowing for the detection of plasmonic properties, structural properties, and guiding properties without exciting the plasmons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical microscopy or light-based methods are used to characterize plasmonic structures, then the measurement is straightforward and equipment is readily available, but the measurement precision and capability are limited due to the diffraction limit of about 1 μm
Solution Approach 1:
The patent combines two different measurement approaches: optical excitation of surface plasmons and electron beam-based detection (EELS). This merging allows the system to overcome the diffraction limit of optical microscopy while maintaining the ability to excite and detect plasmons, achieving sub-wavelength resolution without requiring entirely new equipment
Solution Approach 2:
The patent uses an electron beam as an intermediary to transfer energy to excite surface plasmons, which then interact with the sample. The electron beam serves as a mediator that bridges the gap between optical excitation requirements and electron-based detection capabilities, enabling precise localization below the optical diffraction limit
2Measurement precision
If electron beam methods like EELS are used to investigate plasmons, then measurement precision and spatial resolution are improved, but the ability to provide comprehensive analysis of plasmon properties is limited due to technological feasibility and physical limits
Solution Approach 1:
The patent creates a measurement system that performs multiple functions: it can excite surface plasmons optically, detect them via electron beam energy loss, and characterize both structural and plasmonic properties. This multi-functional approach allows a single system to provide comprehensive analysis that neither optical nor electron methods alone could achieve
3Device complexity
If optical excitation methods are used to investigate plasmons, then the measurement system is simpler and more accessible, but the measurement precision is insufficient due to the diffraction limit
Solution Approach 1:
The patent segments the measurement process into distinct functional components: optical excitation module, electron beam detection module, and data analysis module. This segmentation allows each component to be optimized for its specific function while working together to achieve super-resolution measurement
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
Enables comprehensive investigation and analysis of plasmons and plasmon-polaritons, providing precise information about physical properties and phenomena, and allowing for the identification of plasmonic signals from other signals.
Implementation Method 1
an excitation-beam source (110) configured for irradiating the sample (10) with an excitation-beam (112)
Implementation Method 2
a probe unit (130) configured for exposing the sample to a probing radiation (132) or a probing field (132)
Data Source
AI summary
A measurement system for obtaining information about a sample comprises an excitation-beam source configured for irradiating the sample with an excitation-beam. The measurement system comprises a probe unit configured for exposing the sample to a probing radiation or a probing field, and a detection unit configured for obtaining a first information about an interaction of the probing radiation or the probing field with the sample, if a plasmon or plasmon-polariton was excited by the excitation-beam, and obtaining a second information about an interaction of the probing radiation of the probing field with the sample, if a plasmon or plasmon-polariton was not excited by the excitation-beam.