Fiber nanoimprint enables efficient near field probe fabrication

Colorized SEM image of the campanile near-field probe imprinted on top of an optical fiber
Campanile near-field probe imprinted on top of an optical fiber

EE Times,, and multiple other news agencies have featured our paper titled, “Campanile Near-Field Probes Fabricated by Nanoimprint Lithography on the Facet of an Optical Fiber.”
This is the first demonstration of functional plasmonic nanoantennae, fabricated on the end of an optical fiber using our fiber imprint technology. The near-field probe featured in this article is Campanile probes, one of the most promising near-field probes today, but they are extremely laborious to fabricate. Simplified fabrication method needed to be developed. In the paper, we show the capability to faithfully replicate micrometer scale patterns (the pyramid) with sub-100 nm size features (the gap at the apex), placed to the center of the 4 µm fiber core with sub-100 nm precision. The functionality of the imprinted probes has been tested and confirmed.
This demonstrates our fiber technology enables a low-cost, (much) higher-throughput, and reproducible manufacturing of advanced nano-optical probes – a huge success!

Video of the simulated light propagation in the fiber lens

Watch the video of the simulated light propagation through the high refractive index fiber lens, immersed in the liquid with the refractive index of 1.51. The lens focuses light into a near diffraction-limited spot with the diameter of 730 nm (at the 1/e2 level, at 660 nm wavelength). Find out more about our nanoimprinted fiber lens!

FDTD simulation of light propagation inside Fresnel lens fabricated on an optical fiber via nanoimprint

The conventional approach to the design of the diffractive optics relies on the analytical design of the phase mask. However, this is not enough for the high performance, high numerical aperture structure. The actual simulation that takes into account light intensity redistribution in the structure is needed to get the correct results. The simulation results can be used for the optimization of the structure and to verify the fabrication procedure. Our company offers a complete product development workflow, including the state-of-the-art optical simulations.

Our fiber nanoimprint technology was featured by the!

fiber with nanoimprinted diffractive beam splitter
SEM image of the fiber with diffractive beam splitter fabricated using fiber nanoimprint
3d structure made with fiber nanoimprint
SEM image of the 3D nanoimprinted structure on the edge of the fiber., a science and research news website, has featured our fiber nanoimprint technology in their article "Tiny 3-D structures nanoimprinted on the end of an optical fiber". Our method can create arbitrary free-form three-dimensional structures on the edge of an optical fiber to control the emitted wavefront. Nanoimprint lithography provides a subdiffraction resolution, which results in a precise wavefront control and perfect optical properties. The device, featured in the article, is a diffractive beam splitter. It converts the output of the single mode fiber into four beams of light with equal intensity.

Find out more about our custom optics on a fiber capabilities.