All-Graphene-Contact Electrically Pumped On-Demand Transferrable Nanowire Source

Area of Science:

• Optoelectronics
• Materials Science
• Nanotechnology

Background:

• Photonic integrated circuits (PICs) require efficient on-demand nanowire (NW) light sources.
• Existing NW light sources face practical fabrication and integration challenges.

Purpose of the Study:

• To develop an all-graphene-contact, electrically pumped, and transferrable NW light source.
• To demonstrate stable electrical operation and integration of NW light sources in PICs.

Main Methods:

• Fabrication of a semiconductor NW with optical gain structures using an all-graphene-contact approach.
• Utilizing microtransfer printing for precise integration of NW devices.
• Electroluminescence (EL) spectroscopy and waveguiding experiments.
• Three-dimensional numerical simulations for validation.

Main Results:

• The electrically driven NW device exhibited strong EL emission between graphene contacts.
• Demonstrated waveguiding properties of the NW light source.
• Successful integration of a single NW device into a photonic waveguide.
• Numerical simulations showed good agreement with experimental findings.

Conclusions:

• The all-graphene-contact approach enables stable electrical pumping of NW light sources.
• Microtransfer printing facilitates precise integration for practical applications in PICs.
• This method is adaptable to various micro/nanostructures, enhancing their utility in compact integrated circuits.