Photonic Bose-Einstein condensate
The photonic BEC is a recent feat of applied science at Bonn University; first created in July, 2010, and posted on the journal Nature on Novermber 25, 2010.
A room-temperature liquid with BEC behaviors is mind boggling, to assume a photonic BEC would emulate the low-temperature condensates of hundreds of super-chilled atoms, trapped in the oscillating valley of two colors of laser beams crossing at right angles through a rarified atmosphere of gaseous atoms. Once shed of thermal energy, the literal ballistic travel of gaseous atoms, the atoms form a group huddle as one coherent wave-group. At an observable scale the BEC liquid behaves as a quantum unit, so long as super-chilled atmosphere be maintained. The BEC liquid temperature is essentially at absolute zero, with the slightest raise in temperature of the BEC indicated by vortices internal to the quantum-matter of the BEC.
In the real world, real thermal energy prevents the existence of quantum-matter, until Bonn physicists Jan Klare, Julia Schmitt, Dr. Frank, and Professor Dr. Martin Weitz created a BEC from light within a flourescent optical cavity, essentially chilling light frequency quanta until they themselves cohere into BEC quantum-matter, a precipitate from a laser beam hosted by a population of brightly fluorescing molecules.
The Photonic BEC is cited as a short wavelength optical laser.
In one literal description it is a micro-laser, pumped optically by laser light that is absorbed by the dye.
On first assumptions, the lasing medium is a dispersion of [organic?] dye. The medium would optimally be transparent at the pumping frequency and the fluorescent frequency of the dye molecule. However, the reflecting chamber containing the lasing medium is only micrometers in length. This article will revise as details are found.
Q1: What is the lasing dispersion medium and the flourescent dye?
Q2: Is the BEC long-lived in a continuous laser beam, or transient during a pulse.
Q3: What measurement technique is used to realize the existence of a photonic BEC?
Q4: Will solid state LED and related technology be able to provide sufficient pumping energy, and or an illuminating array of focused power-LEDs?
Q5: Is the BEC essentially a half wavelength standing wave at the flourescent frequency? Or various wave-modes?
Q6: Is a whispering gallery effect realizable as the geometry of the reflecting cavity containing the lasing medium, toward generation of a planar wave of whatever coherence-level manifests. Or planar fans of various optical radii in by-wide geometries.
Q7: Is therefore lower frequency operation toward the long infrared, approaching macro-scale wavelengths, as organized waveforms in surface plasmon interaction? Essentially a plasmon-organized stimulated emission of the fluorescent energy, or a plasmon-modulation, such as T-wave signals, that modulate the laser beam intensity as amplified T-waves on the laser beam frequency.
Q8: Might the laminations of a frequency selective mirror also be doped with the flourescent dye for inline frequency conversion and various interesting applied effects?
Q9: Might the gain of the lasing medium overcome threshold against multi-reflector losses, then might photonic BEC resonant systems exist in structured segments connected in closed loops?
Q10: In principle and literally, is the act of chilling a photon that is resonant against dye molecules in sufficiently amplified quanta density creating liquified light? This would define the photonic BEC literally and exactly as liquid light —pending the correct usage of the term, BEC, in case of chilled atoms verses chilled photons.
Knots of light, an article on recent Bonn University research in photonic BEC made with laser light at room temperature.