Increased Transfer Efficiency from Molecular Photonic Wires on Solid Substrates and Cryogenic Conditions

Area of Science:

• Nanophotonics
• Molecular engineering
• DNA nanotechnology

Background:

• Molecular photonic wires (MPWs) are nanophotonic structures for light manipulation.
• DNA assembly offers precise and cost-effective MPW fabrication.
• Existing DNA-based MPWs have limited length and efficiency, and lack solid-state integration.

Purpose of the Study:

• To demonstrate solid-state integration of DNA-based MPWs.
• To enhance the photonic transfer efficiency of DNA-based MPWs.
• To explore the effect of low temperatures on MPW performance.

Main Methods:

• Spin-coating DNA-based MPWs in a polymer matrix onto silicon wafers.
• Fabricating MPWs of varying lengths using DNA assembly.
• Measuring photonic transfer efficiency at room temperature and 5 K.

Main Results:

• DNA-based MPWs successfully integrated onto silicon wafers via spin-coating.
• Achieved a 5-fold increase in photonic transfer efficiency compared to solution-phase MPWs.
• Observed efficiency increases of 40-240% at 5 K, dependent on MPW length.

Conclusions:

• Solid-state integration significantly enhances DNA-based MPW performance.
• Low-temperature operation further boosts energy transport efficiency.
• Improved MPWs offer potential for optoelectronics and nanoscale energy transfer studies.