Nanorod Optoelectronic Component with Structured Metallization Antenna
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Solution Overview
Problem
Optoelectronic components, such as LEDs, face challenges in reducing switching-on and switching-off times and enhancing spontaneous emission rates while minimizing non-radiative loss mechanisms and optical power droop with increasing charge carrier current.
Innovation Solution
The optoelectronic component incorporates nanorods with an active zone, encapsulated by a potting compound and surrounded laterally by structured metallization acting as an antenna, which increases spontaneous recombination rates and emission efficiency without direct electrical contact, thereby reducing switching times and counteracting Auger-Meitner recombination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If non-radiative loss mechanisms are applied to shorten switching times, then switching-on and switching-off times are reduced, but emission efficiency is significantly lost
Solution Approach 1:
The patent replaces non-radiative loss mechanisms with a structured metallization antenna system that utilizes quantum mechanical effects and electromagnetic radiation to accelerate spontaneous emission. The antenna structure (comprising conductive elements arranged in specific geometric patterns) substitutes the traditional mechanical/electrical doping methods for shortening switching times, thereby achieving fast switching without sacrificing emission efficiency through energy-wasting non-radiative recombination pathways.
Solution Approach 2:
The patent changes the physical parameters of the system by introducing a structured metallization antenna with specific geometric configurations (such as dipole antennas with optimized lengths and spacing). These parameter changes in the antenna structure enable control over the spontaneous emission rate through quantum mechanical coupling, allowing switching times to be reduced while maintaining high emission efficiency by tuning the antenna-nanorod interaction parameters.
2Device complexity
If Auger-Meitner recombination is allowed to occur at high carrier currents, then device operation is simplified, but optical power droop increases
Solution Approach 1:
The patent substitutes the conventional current-driven light emission mechanism with an antenna-mediated spontaneous emission process. The structured metallization antenna couples to the nanorod active zones and enhances the spontaneous emission rate through quantum mechanical effects, replacing the Auger-Meitner recombination pathway that causes optical power droop at high currents. This substitution maintains device operational simplicity while eliminating the efficiency loss associated with Auger recombination.
3Device complexity
If nanorods are left unprotected, then device structure is simpler, but nanorods are prone to breakage or tipping
Solution Approach 1:
The patent introduces a potting compound as an intermediary material that encapsulates and protects the nanorods. This potting compound serves as a mediator between the nanorods and the external environment, providing mechanical support and preventing breakage or tipping while allowing the nanorods to maintain their functional properties. The intermediary layer does not significantly interfere with the optical or electrical functionality of the nanorods.
4Reliability
If structured metallization is placed in direct contact with nanorods, then electrical connection is achieved, but spontaneous emission rate is reduced
Solution Approach 1:
The patent extracts the electrical connection function from the structured metallization antenna, separating it from the optical emission function. The antenna is designed to couple electromagnetically to the nanorod active zones without requiring direct electrical contact, thereby taking out the electrical connection requirement and allowing the spontaneous emission process to proceed at enhanced rates through quantum mechanical coupling alone. This extraction resolves the conflict between electrical connectivity and emission efficiency.
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
This configuration significantly shortens switching-on and switching-off times to less than 1 nanosecond, maintains constant emission efficiency, and reduces optical power droop, achieving performance comparable to lasers while avoiding significant loss mechanisms.
Implementation Method 1
a spontaneous recombination rate in the active zone of the nanorods can be significantly increased based on quantum mechanical effects, as a result of which spontaneous emission at the nanorod is increased
Implementation Method 2
a spontaneous recombination rate in the active zone of the nanorods can be significantly increased based on quantum mechanical effects
Implementation Method 3
After spontaneous emission, photons are advantageously emitted via the antenna
Implementation Method 4
They are encapsulated by a potting compound, so that advantageously a cured potting compound fixes the nanorods in the component and the risk of breakage or tipping of the nanorods is reduced
Data Source
AI summary
The invention relates to an optoelectronic component (10), comprising a carrier (1) and a plurality of nanorods (2), which are arranged on the carrier (1), wherein the nanorods (2) each comprise an active zone (2d). Furthermore, the optoelectronic component (10) comprises a potting compound (3), which is arranged on the carrier (1) and at least partially embeds the nanorods (2), and a structured metallization (5), which laterally surrounds the nanorods (2), wherein the nanorods (2) extend in a longitudinal direction N, the structured metallization (5) extends in a longitudinal direction M, and the longitudinal direction M of the structured metallization (5) extends transversely to the longitudinal direction N of the nanorods (2).