Electro-chemo-optical Devices Using Oxygen Vacancy Control
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Solution Overview
Problem
Existing reconfigurable active optical components face challenges in achieving flexible, broad spectral tunability, rapid response times, and compatibility with standard clean room processes, particularly in thermally induced phase changes and lithium intercalation methods.
Innovation Solution
The development of reprogrammable electro-chemo-optical devices using metal oxide films with complex refractive indices that vary with oxygen vacancy concentration, enabled by applying bias voltages across electrodes to control oxygen vacancy distribution and polarization, allowing for dynamic modulation of optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If thermally induced phase changes in chalcogenide materials are used, then spectral tunability is achieved, but response time is slow and power consumption is high
Solution Approach 1:
The patent changes the physical parameter used for optical modulation from thermal phase changes to electrochemical oxygen vacancy concentration changes. By applying voltage to control oxygen vacancy distribution in metal oxide films, the complex refractive index is modulated directly without thermal heating, achieving both spectral tunability and fast response times
Solution Approach 2:
The patent replaces the thermal field (heat-induced phase changes) with an electrochemical field (voltage-controlled oxygen vacancy migration). This substitution eliminates the need for thermal heating while achieving optical property modulation, thereby reducing power consumption and increasing response speed
2Adaptability or versatility
If thermally induced phase changes in chalcogenide materials are used, then spectral tunability is achieved, but power consumption is high
Solution Approach 1:
The patent replaces thermal field with electrochemical field, substituting heat-driven phase changes with voltage-driven oxygen vacancy migration. This eliminates continuous thermal heating requirements, significantly reducing power consumption while maintaining spectral tunability through electrochemical control
Solution Approach 2:
The patent changes the control parameter from temperature to voltage. By controlling oxygen vacancy concentration through applied voltage rather than thermal heating, the system achieves optical modulation with minimal power consumption, as electrochemical processes require far less energy than thermal phase transitions
3Adaptability or versatility
If lithium intercalation into oxide materials is used, then reconfigurability is achieved, but compatibility with standard clean room processes is poor
Solution Approach 1:
The patent changes the intercalation mechanism from lithium ions to oxygen vacancies. By controlling oxygen vacancy concentration through voltage application in metal oxide films, the system achieves reconfigurability using electrochemical processes that are compatible with standard semiconductor manufacturing and clean room processes, unlike lithium intercalation which requires specialized handling
4Adaptability or versatility
If ion blocking electrodes are used to create oxygen vacancy gradient, then optical property modulation is achieved, but device structure complexity increases
Solution Approach 1:
The patent applies local quality by using ion-blocking electrodes only at specific locations where oxygen vacancy confinement is needed. The electrodes create localized oxygen vacancy gradients in the metal oxide film without requiring complete structural redesign, achieving optical property modulation while maintaining relatively simple device architecture
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
These devices offer gradual control of optical properties, broader spectral tunability, compatibility with standard clean room processes, and faster response times, operating from cryogenic to high temperatures, enhancing flexibility and reliability.
Implementation Method 1
reprogrammable electro-chemo-optical devices using metal oxide films with complex refractive indices that vary with oxygen vacancy concentration
Implementation Method 2
Applying a bias voltage across the metal oxide film using the first electrode and the second electrode creates a gradient in the oxygen vacancy concentration, thus inducing an oxygen vacancy polarization
Implementation Method 3
When a bias voltage is applied across the ionic conductor using the first electrode and the second electrode, an exchange of oxygen vacancies (or equivalently oxygen ions) occurs between the metal oxide film and an oxygen source coupled to the optical device through the ionic conductor and the second electrode
Implementation Method 4
the ionic conductor and the second electrode are ion conducting
Implementation Method 5
Applying a bias voltage across the metal oxide film creates a gradient in the oxygen vacancy concentration
Data Source
AI summary
Reconfigurable, active optical components can flexibly manipulate light. One example of these components is an electro-chemo-optical device that utilizes a metal oxide film with a complex refractive index that varies as a function of an oxygen vacancy concentration. The optical device may include a metal oxide film, a first electrode, and a second electrode. The first electrode and the second electrode may be used to supply a bias voltage to induce a change in the oxygen vacancy concentration in order to change the optical properties (absorbance, transmittance, and/or reflectance) of the optical device. The magnitude and spatial distribution of the oxygen vacancy concentration may be altered to affect the optical properties of the optical device. In some designs, the optical device may also include an ionic conductor and oxygen source to supply/receive oxygen ions to/from the metal oxide film.