研究目的
Investigating the enhancement of photoluminescence emitted by InAs/GaAs quantum dots at room temperature through confined Tamm plasmon structures resonant at telecom wavelengths.
研究成果
The study demonstrates microdisc structures that produce confinement of Tamm plasmon modes resonant at telecoms wavelength, showing an 11 times enhancement of the emission. The scalability, tunability, and robustness of the CTPs make them an ideal platform for the development of detectors, single-photon sources, and optical switches at telecoms wavelength.
研究不足
The study is limited by the fabrication roughness at the disc edge and the metal layer and interface roughness, which are not included in FDTD simulations. Additionally, the discrete modes cannot be clearly resolved due to the small separation between the fundamental and the first excited modes.
1：Experimental Design and Method Selection:
The study employs gold microdisc structures to produce confined Tamm plasmons (CTPs) resonant around 1.3 μm. The design rationale is based on the interface modes between a metal layer and a distributed Bragg reflector (DBR).
2：3 μm. The design rationale is based on the interface modes between a metal layer and a distributed Bragg reflector (DBR).
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Samples are grown using molecular beam epitaxy on a GaAs substrate, consisting of a 17.5x GaAs/AlAs pair DBR with a 75 nm GaAs spacer. InAs quantum dots are grown within the structures.
3：5x GaAs/AlAs pair DBR with a 75 nm GaAs spacer. InAs quantum dots are grown within the structures.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Gold microdiscs of various diameters, a photolithographic resist, a lift-off technique, a continuous wave 635-nm laser source for photoluminescence measurements.
4：Experimental Procedures and Operational Workflow:
The samples are characterized using Fourier image spectroscopy (FIS) to measure the re?ectance and photoluminescence for different wavelengths, allowing the dispersion of the TPs to be obtained.
5：Data Analysis Methods:
The resonance spectral position and Q factor are obtained from a Gaussian fit to the photoluminescence response.
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