Semiconductor Waveguide Heater Contacts for Low Optical Loss
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Solution Overview
Problem
The challenge with existing semiconductor waveguides is the uneven temperature control due to reduced heat exposure and thermal transfer efficiency, leading to optical radiation loss and impaired performance.
Innovation Solution
A heater is designed with conductive heater contacts that extend along the sides of the semiconductor waveguide's ridge portion, ensuring increased heat exposure and improved thermal transfer, while maintaining a sufficient distance to minimize optical radiation loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heater is placed close to the ridge portion of the semiconductor waveguide, then thermal transfer efficiency is improved, but optical radiation loss increases
Solution Approach 1:
The patent introduces dielectric structures as intermediary elements positioned between the heater and the ridge portion of the semiconductor waveguide. These dielectric structures serve as thermal mediators that conduct heat from the heater to the ridge while maintaining sufficient physical separation to prevent direct optical interaction, thus resolving the contradiction between thermal transfer efficiency and optical radiation loss
Solution Approach 2:
The patent extends the heater contacts laterally along the sides of the ridge portion in addition to the top surface, utilizing a three-dimensional contact arrangement. This dimensional expansion allows heat to be transferred from multiple directions and surfaces, improving thermal transfer efficiency without requiring the heater to be placed in immediate proximity to the ridge, thereby reducing optical radiation loss
2Temperature
If the heater contacts extend close to the ridge portion, then heat exposure is increased, but optical radiation loss occurs
Solution Approach 1:
Dielectric structures are positioned between the heater contacts and the ridge portion to act as thermal mediators. These intermediaries enable heat transfer while maintaining physical separation that prevents the heater from affecting optical radiation, thus increasing heat exposure without causing optical loss
Solution Approach 2:
The patent applies different properties to different regions: the heater contacts are made conductive for heat transfer, while the dielectric structures providing separation have insulating properties. This local differentiation allows the system to achieve both high heat exposure and protection against optical radiation loss in different spatial zones
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
Enhanced temperature control and reduced optical loss in semiconductor waveguides, improving the performance and efficiency of integrated optical circuits.
Implementation Method 1
A heater is designed with conductive heater contacts that extend along the sides of the semiconductor waveguide's ridge portion, ensuring increased heat exposure and improved thermal transfer
Implementation Method 2
Current is passed through the conductive heater line to increase the temperature of the conductive heater line
Data Source
AI summary
An integrated chip includes a substrate, a semiconductor waveguide layer, a conductive heater line, a first heater contact, and a second heater contact. The semiconductor waveguide layer is over the substrate. A base portion of the semiconductor waveguide layer extends laterally over the substrate. A ridge portion of the semiconductor waveguide layer protrudes upward from the base portion. The conductive heater line is spaced over the ridge portion of the semiconductor waveguide layer. The first heater contact and the second heater contact extend from the conductive heater line to the base portion of the semiconductor waveguide layer on opposite sides of the ridge portion of the semiconductor waveguide layer.