Vertically integrated (Ga, In)N nanostructures for future single photon emitters operating in the telecommunication...

Area of Science:

• Materials Science
• Quantum Optics
• Semiconductor Physics

Background:

• III-nitride semiconductors are crucial for optoelectronic devices.
• Developing efficient single photon emitters operating at room temperature is a key challenge.
• Telecommunication wavelengths require specific material properties and device structures.

Purpose of the Study:

• To advance III-nitride technology for room-temperature single photon emission.
• To demonstrate electrically driven indium nitride (InN) nanostructures for telecommunication wavelengths.
• To enable individually addressable single photon sources.

Main Methods:

• Growth of positioned, single pyramidal InN nanostructures capped by Mg-doped GaN.
• Optimization of nanostructure size for narrowband emission in the telecommunication range.
• Development of a device concept for single nanostructure addressability and integration into high-frequency layouts.

Main Results:

• Narrowband emission in the telecommunication wavelength range achieved by optimizing nanopyramid size.
• Successful capping with p-GaN and implementation of a conductive polymer (PEDOT:PSS) for p-contact.
• 25% increase in light transmittance using PEDOT:PSS compared to Ni/Au contacts.
• Integration of single nanopyramids into high-frequency device layouts.

Conclusions:

• Decisive technological steps realized for room-temperature operation of III-nitride single photon emitters.
• Promising route established for electrically driven, room-temperature InN-based single photon emitters.
• Potential for applications in quantum communication and secure networks operating at telecommunication wavelengths.