Deformable Optical Micro-Hotplate with Piezoelectric Actuator
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Solution Overview
Problem
Conventional micro-hotplates are fixed and lack adjustability, which limits their ability to optimize light emission directionality and efficiency.
Innovation Solution
An optical micro-hotplate device with a deformable substrate, featuring a photonic crystal emitter and a piezoelectric actuator, allowing for adjustable light directionality and emission by applying potential differences to heat the active layer and bend the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional micro-hotplates are used, then the device structure is simple and fixed, but the light emission directionality and efficiency cannot be optimized
Solution Approach 1:
The patent applies the dynamics principle by making the substrate deformable through piezoelectric actuators. The substrate transitions from a fixed state to a dynamically adjustable state, allowing the emitter position and light emission directionality to be changed in real-time by applying voltage to the piezoelectric elements. This resolves the contradiction by enabling adaptability without permanently increasing structural complexity.
Solution Approach 2:
The patent employs parameter changes by modifying the physical state of the substrate through piezoelectric effect. By changing the electrical parameter (applying voltage) to the piezoelectric actuators, the mechanical parameter (substrate shape/emitter position) is changed, thereby adjusting light emission directionality. This allows optimization of emission characteristics without permanent structural modification.
2Productivity
If a fixed emitter structure is used, then the device is easier to manufacture, but the light emission efficiency and directionality are limited
Solution Approach 1:
The patent uses composite materials by combining the substrate with piezoelectric actuators and photonic crystal structures. This composite construction enables the substrate to have both structural integrity for manufacturing and deformability for adjusting light emission efficiency. The photonic crystal layer integrated into the substrate further enhances emission efficiency through selective wavelength amplification while maintaining manufacturability.
Solution Approach 2:
The patent applies segmentation by dividing the emitter structure into distinct functional layers: the substrate, piezoelectric actuators, active layer, and photonic crystal layer. This segmentation allows each component to be optimized and manufactured separately using standard techniques, then assembled into a integrated structure that achieves high emission efficiency while remaining manufacturable.
3Adaptability or versatility
If the emitter is fixed in position, then the device structure is simpler, but the ability to optimize emission for different applications is reduced
Solution Approach 1:
The patent replaces traditional mechanical adjustment systems (such as movable mounts or rotating stages) with a piezoelectric actuation system integrated directly into the substrate. This substitution eliminates complex external mechanical mechanisms while providing precise control over emitter position and orientation through electrical signals, thereby maintaining structural simplicity while enhancing adaptability.
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 focused, adjustable broadband light emission with enhanced directionality and efficiency, suitable for applications like gas sensing and telecommunications, reducing noise and calibration issues in gas sensors.
Implementation Method 1
the light is emitted due to an increase in a temperature of the active layer upon application of a first potential difference between the first electrode and the second electrode
Implementation Method 2
the light is emitted due to an increase in a temperature of the active layer
Implementation Method 3
the actuator portion, i.e. the piezoelectric layer, is configured to deform, e.g. bend, the elongate substrate upon application of a second potential difference between the first electrical pad and the second electrical pad
Implementation Method 4
The active layer may be patterned to form a photonic crystal layer for enhancing a directionality of the emitted light
Data Source
AI summary
Various embodiments may relate to an optical device. The device may include an elongate substrate, an emitter portion at a distal end portion of the elongate substrate, the emitter portion configured to emit light, and an actuator portion at a proximal end portion of the elongate substrate opposite the distal end portion of the elongate substrate. The emitter portion may include a first electrode, a second electrode, and an active layer between the first electrode and the second electrode so that the light is emitted due to an increase in a temperature of the active layer upon application of a first potential difference between the first electrode and the second electrode. The active layer may be patterned to form a photonic crystal layer for enhancing directionality of the emitted light.