Difference between revisions of "Mechanooptical conversion"

Revision as of 12:15, 26 August 2022

Due to

• high pressures being easily generatable in gem-gum systems and
• electronic states being tunabe by pressures

it should by possible to excite electronic states by
merely applying sufficient pressure onto the right atomical structures.

For human visible wavelengths transition metal F-centers in gemstones are of interest since
many of these have energy transitions in this range.

Active vs passive

Beside …

• for active colored light emission F-centers are also interesting just
• for passive color light absorption.

Both active and passive are relevant for display technology.
But this page is about energy conversion between mechanical & optical. Not stopping in the middle.
For discussion of the passive part see: Color emulation, Optical effects, ...

Side-note:
There is still energy conversion involved in passive color, but its never harvested.
Specifically energy conversion ...

• from natural optical energy
• to electronic excitation and then
• to uncaught thermal energy

Photonic steampunk

One idea would be to have a dead end of an optical fiber and
pass by with an attachment chain (over some stretch of the fiber) electronically excited material
in such a way that the dragging by catalyses a radiation emitting electronic de-excitation.
(This could probably be combined with laser like stimulated emission.)
At an other location along the attachment chain the material is electronically re-excited.
Electronically re-excited either by:

• mechanical means (like applying very high pressure) or
• electronic means or (it's electrooptical conversion with a mechanical twist)
• in any other suitable way.

Note that this approach with a chain only makes sense if in-place-re-excitation is a bottleneck.
(Kinda hope so, transporting metastable electronic excitations on an nanoscale attachment chain sounds kinda cool. Like photonic steampunk)

Long enough phosphorescent decay time needed:
The phosphorescent transition will need to have a long enough decay time to be mechanically transportable

• from excitation-site
• to (catalyzed) de-excitation-site.

Maybe with advanced atomically precise manufacturing capabilities
(and fine tunable unusually large intermolecular forces)
a lot bigger range of phosphorescent systems will be acessible/developable.
(TODO: Investigate design of phosphorescent centers assuming advanced gem-gum technology is available.)

Machine phase preventing photo-bleaching:
Having the photoactive molecules in machine phase may make it possible to avoid "photobleaching" (photoactive molecules taking damage) entirely.

Radio wave generation by mechanically rotating dipoles

(wiki-TODO: Discuss this.)

Optomechanical conversion

Early optomechaical conversion

There are molecules that change their conformation (shape) when
receiving a quantum of light ans changing electronic structure.

What is the influence of mechanical load on these shape transitions? That is:
How does the probability of a flip drop with increasing load (putting the flipped state in a higher energy state).

The idea is not to covalently cross-link two surfaces via shape conversion molecules!
A single molecule could not make the push and usually all molecules won't get excitated at the same time.

The idea is rater to covalently link molecules only on one surface and have only weak interactions with the other side.
This way for a practical actuator many many molecules can be put in parallel, such
that all can flip individually slowly accumulating a higher global energy state and global force.

Advanced optomechanical conversion (maybe)

Crystolecules containing F-centers may deform on excitation of that center.
Energy might be extractible via gearing down this motion.
The same strategy as for early optomechaical conversion should be employable.

Related

• Optical effects, Color emulation, Gem-gum display technology
• Ligand field theory
• Fun with spins
• Organometallic gemstone-like compound