Mozaic Technology Innovation

Plasmonic Writer

A Marvel of Miniaturization and Precision Engineering

At the core of this writer's operation is the ability to precisely heat the superlattice platinum-alloy media to over 800º Fahrenheit, which then cools again in less than two nanoseconds.

Our writer introduces three groundbreaking elements.

These breakthroughs, along with a traditional magnetic core, play an essential role in high-density data writing.

Nanophotonic Laser
A precise light beam momentarily heats the recording media.
Photonic Funnel
Channels the laser light from its source to the quantum antenna.
Quantum Antenna
Converts the laser’s photonic energy into a plasmonic state to enable recording.

The nanophotonic laser provides energy.

This energy temporarily alters the magnetic properties of the superlattice platinum-alloy media, precisely targeting the area for data writing. By heating specific nanoparticles on the media, it lowers their magnetic resistance, allowing data to be written with reduced magnetic field strength.

This targeted heating affects only the intended bit, preserving the integrity of adjacent data and allowing more bits to be recorded on each disk.


The photonic funnel manipulates light at an incredibly minute scale.

To enable Mozaic’s precision and efficiency, the photonic funnel accurately channels laser light directly to the quantum antenna.

Its design, involving advanced materials science and nanofabrication techniques, confines the laser's path to preserve the integrity and power of the beam as it traverses to its target. The materials chosen have a high refractive index to guide light efficiently, with minimal dispersion or loss.


The photonic funnel’s geometry and dimensions are meticulously calculated.

This ensures synergy between the light and the quantum antenna that maximizes energy transfer.

Such precision is not merely about controlling light—it's about intensifying the potential for data storage. The quantum funnel acts as a waveguide to deliver a focused beam to heat the recording media at precise points; this is instrumental in Seagate's ability to increase areal density, enabling more data to be stored within the same physical space of a hard disk drive.


The quantum antenna converts laser energy into heat at an ultra-fine scale.

Critical to high-density data writing, the antenna generates surface plasmons—quantum-level oscillations of electrons induced by light at the metal's surface. This conversion process is highly localized, affecting only the disk area where data is written.


Together, these components enable a major boost in areal density.

Our advancements in thermal management, materials engineering, and the miniaturization of components allow Mozaic 3+™ integrated hard drives to encode data more densely than ever before.

Each step of this methodical evolution contributes to a system that enables greater storage capacity, data integrity, and drive longevity.