This concept has become a staple of many science-fiction works, so much so that authors frequently do not even bother to explain or justify them to their readers, treating them almost as established fact and attributing whatever capabilities the plot requires. The ability to create force fields has become a frequent superpower in superhero media.
An early precursor of what is now called "force field" may be found in William Hope Hodgson's The Night Land (1912), where the Last Redoubt, the fortress of the remnants of a far-future humanity, is kept safe by "The Air Clog" generated by the burning "Earth-Current".[2][1] An even earlier precursor is Florence Carpenter Dieudonné's 1887 novel Rondah, or Thirty-Three Years in a Star,[1] where the far-off Sun Island is enclosed by a "wall in the air" that blocks access by land, sea and air, which is occasionally disabled.[3]
In Isaac Asimov's Foundation universe, personal shields have been developed by scientists specializing in the miniaturization of planet-based shields. As they are primarily used by Foundation Traders, most other inhabitants of the Galactic Empire do not know about this technology. In an unrelated short story Breeds There a Man...? by Asimov, scientists are working on a force field ("energy so channelled as to create a wall of matter-less inertia"), capable of protecting the population in case of a nuclear war. The force field demonstrated in the end is a solid hemisphere, apparently completely opaque and reflective from both sides. Asimov explores the force field concept again in the short story Not Final!.
The concept of force fields as a defensive measure from enemy attack or as a form of attack can be regularly found in modern video games as well as in film, such as in The War of the Worlds (1953, George Pál) and Independence Day.
Science fiction and fantasy avenues suggest a number of potential uses of force fields:[4]
A barrier allowing workers to function in areas exposed to the vacuum of space. The atmosphere inside would be habitable by humans, while at the same time allowing permissible objects to pass through the barrier
A walkable surface between two points without the necessity of building a bridge.
An emergency quarantine area to service those afflicted by harmful biological or chemical agents
A fire extinguisher where oxygen is exhausted by the use of a space confined by a force field thereby starving the fire
As a shield to protect against damage from natural forces or an enemy attack
As a deflector to allow fast spaceships to traverse space without colliding with small particles or objects.
A temporary habitable space in an area otherwise unsuitable for sustaining life
As a security apparatus used to confine or contain a captive
The capabilities and functionality of force fields vary; in some works of fiction (such as in the Star Trek universe), energy shields can nullify or mitigate the effects of both energy and particle (e.g., phasers) and conventional weapons, as well as supernatural forces. In many fictional scenarios, the shields function primarily as a defensive measure against weapons fired from other spacecraft. Force fields in these stories also generally prevent transporting. There are generally two kinds of force fields postulated: one in which energy is projected as a flat plane from emitters around the edges of a spacecraft and another where energy surrounds a ship like a bubble.
The ability to create force fields has become a frequent superpower in superhero media. While sometimes an explicit power on their own, force fields have also been attributed to other fictional abilities. Marvel Comics'Jean Grey is able to use her telekinesis to create a barrier of telekinetic energy that acts as a force field by repelling objects. Similarly, Magneto is able to use his magnetism to manipulate magnetic fields into acting as shields.
The most common superpower link seen with force fields is the power of invisibility. This is seen with Marvel Comics' Invisible Woman and Disney Pixar's Violet Parr.
Force fields often vary in what they are made of, though are commonly made of energy. The 2017 series The Gifted featured character Lauren Strucker who had the ability to create shields by pushing molecules together. This resulted in her being able to construct force fields out of air and water particles rather than energy.
Research
In 2005, the NASAInstitute for Advanced Concepts devised a way to protect from radiation by applying an electric field to spheres made of a thin, non-conductive material coated with a layer of gold with either positive or negative charges, which could be arranged to bend a stream of charged particles to protect from radiation.[5]
In 2006, a University of Washington group in Seattle, Washington, had been experimenting with using a bubble of charged plasma, contained by a fine mesh of superconducting wire, to surround a spacecraft.[6] This would protect the spacecraft from interstellar radiation and some particles without needing physical shielding.
In 2008, Cosmos Magazine reported on research into creating an artificial replica of Earth's magnetic field around a spacecraft to protect astronauts from dangerous cosmic rays.[11] British and Portuguese scientists used a mathematical simulation to prove that it would be possible to create a "mini-magnetosphere" bubble several hundred meters across, possibly generated by a small uncrewed vessel that could accompany a future crewed mission to Mars.
In 2014, a group of students from the University of Leicester released a study describing functioning of spaceship plasma deflector shields.[12]
In 2015, Boeing was granted a patent on a force field system designed to protect against shock waves generated by explosions. It is not intended to protect against projectiles, radiation, or energy weapons such as lasers. The field purportedly works by using a combination of lasers, electricity and microwaves to rapidly heat the air creating a field of (ionised) superheated air-plasma which disrupts, or at least attenuates, the shock wave. As of March 2016, no working models were known to have been demonstrated.[13][14]
^"Night Land by William Hope Hodgson" (free download). Quote: "... a great circle of light, which was set up by the Earth-Current, and burned within a transparent tube; or had that appearance. And it bounded the Pyramid for a clear mile upon every side, and burned for ever; and none of the monsters had power to pass across, because of what we did call The Air Clog that it did make, as an invisible Wall of Safety"
^The Project Gutenberg eBook of Rondah; or, thirty-three years in a star (free download/reading). Quote: "It was useless to try to find out where and of whom they had learned our language. They only could tell us that they had been taught from the Sun Island, a far-off land of the sea. Sometimes, they said, the tide was low and we could walk on dry rocks to the isle. Sometimes there was a “wall in the air.” Then no one could get there."
