Femtotechnology was three orders of magnitude smaller than picotechnology and six orders of magnitude smaller than nanotechnology. It was on the scale of sub-atomic particles. Manipulating matter at the sub-atomic level would revolutionize society in ways that picotechnology did not.
(Note: The background section of this page uses most of the same words as the picotechnology of Terra Futura to save time.)
Nanotechnology had revolutionized the 21st century. Working on a molecular level, nanotechnology could accomplish anything. By 2025, its first application was in medicine. By 2039, it was being used for full immersion virtual reality. By 2045, nanotechnology was used for general purpose computing. By 2048, nanotechnology was used for biostasis. By 2050, nanotechnology gave rise to claytronics. By 2070, it was allowing for nanofabricators. At the same time, nanotechnology revolutionized clothes. Over the course of the 21st century, nanotechnology became smaller and smaller. By the late 21st century, picotechnology was born.
Picotechnology was three orders of magnitude smaller than nanotechnology. With it, the structure of atoms could be altered by manipulating the energy states of electrons. This allowed for people to produce metastable states with highly unusual properties. This created new more exotic forms of atoms. This led to the creation of metastable rocket fuels for space travel. Another application was teleportation. It was now possible to teleport macro-scale objects as small as a grain of sand and retain their structure. Picotechnology also helped mind uploading enter the mainstream. At the same time, picotechnology was becoming smaller and smaller. Soon, femtotechnology would be born.
Tech Level: 13
At the sub-atomic level, the world was ever more weird. Engineering at this scale involved directly manipulating the finest known structures of matter, such as quarks and strings. This allowed people to manipulate the properties of atoms on the sub-atomic level. This proved useful for advances in macro-scale teleportation during the 22nd century when femtotechnology was invented. Stationary objects started being teleported. Of course, it was not until the 23rd century that humans would finally be teleported. Femtotechnology helped uncover new laws of physics which led to anti-gravity and force fields like the ones in Star Trek. In the world of materials, metals were being made that harder and stronger than carbon. These were capable of being used in probes that could go all the way into the center of the Earth or into the core of the sun without burning up. Femtotechnology was also instrumental in faster-than-light space travel coming into existence. More exotic materials such as wholly transparent metals, highly luminous metals, frictionless surfaces, and ultradense, but extremely lightweight structures were now possible. Femtotechnology was being guided with advanced AI as were many other areas of science. Eventually, this would lead to the matter replicator.