Infrared Optical Sensor Using 3D Nanostructured TMD Absorber
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Transition metal dichalcogenides with a single layer have limitations in light absorption efficiency and wavelength selectivity in the visible range due to a small specific surface area and unique band gap, which restricts their application in infrared optical sensors.
Innovation Solution
An infrared optical sensor is developed using a three-dimensional nano-structured absorber based on transition metal dichalcogenides, where optical absorption is extended to the near-infrared region through localized surface plasmon resonance, achieved by forming a channel layer and optical absorption structures on a substrate and bonding wavelength adjustment elements to the surfaces of these structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single layer of transition metal dichalcogenide is used, then the device maintains simplicity and semiconductor characteristics, but light absorption efficiency and wavelength selectivity are limited due to small specific surface area and unique band gap
Solution Approach 1:
The patent transitions from a two-dimensional single layer structure to a three-dimensional nanostructured absorber composed of vertically stacked transition metal dichalcogenide layers. This dimensional change increases the specific surface area and enables extended optical absorption into the near-infrared region while maintaining the fundamental semiconductor characteristics of the material.
2Ease of manufacture
If a single layer of transition metal dichalcogenide is used, then the manufacturing process remains simple, but wavelength selectivity is restricted due to unique band gap
Solution Approach 1:
The patent adjusts the optical absorption characteristics by changing the number of stacked layers and controlling the thickness of each layer. This parameter adjustment enables tuning of the absorption wavelength into the near-infrared region while maintaining compatibility with existing manufacturing processes for transition metal dichalcogenide synthesis.
3Reliability
If three-dimensional nano-structured absorber is formed, then light absorption efficiency in near-infrared region is improved, but device complexity increases
Solution Approach 1:
The patent creates a composite nanostructured absorber by stacking multiple transition metal dichalcogenide layers with specific orientations. This composite structure achieves enhanced near-infrared absorption efficiency while the use of identical material layers maintains manufacturing simplicity and avoids the complexity of integrating dissimilar materials.
4Adaptability or versatility
If three-dimensional nano-structured absorber is formed, then wavelength selectivity is extended to near-infrared, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs the same transition metal dichalcogenide material for both the channel layer and the optical absorption structures. This universal material approach allows a single manufacturing process to produce both functional components, reducing the need for separate precision fabrication steps and simplifying thickness control requirements.
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 solution enhances electrical characteristics and improves light absorption efficiency in the near-infrared region, allowing for adjustable absorption wavelengths and increased sensitivity in both visible and infrared ranges.
Implementation Method 1
an optical absorption effect is improved in a near-infrared wavelength due to a localized surface plasmon resonance in a vertical nanostructure
Data Source
AI summary
Provided is an infrared optical sensor including a substrate, a channel layer on the substrate, optical absorption structures dispersed and disposed on the channel layer, and electrodes disposed on the substrate, and disposed on both sides of the channel layer, wherein the channel layer and the optical absorption structures include transition metal dichalcogenides.