The idea of cooling a solid-state optical material by simply shining a laser beam onto it may
seem counterintuitive, but this is rapidly becoming a promising technology for future …

This review discusses the progress and ongoing efforts in optical refrigeration. Optical
refrigeration is a process in which phonons are removed from a solid by anti-Stokes …

Optical irradiation accompanied by spontaneous anti-Stokes emission can lead to cooling of
matter, in a phenomenon known as laser cooling, or optical refrigeration, which was …

Laser radiation has been used to cool matter ranging from dilute gases to micromechanical
oscillators. In Doppler cooling of gases, the translational energy of atoms is lowered through …

Can Laser Light Cool Semiconductors? ≈kT ≈ kT Page 1 Can Laser Light Cool
Semiconductors? Mansoor Sheik-Bahae1 and Richard I. Epstein1,2 1Department of Physics …

We report the first observation of anti-Stokes fluorescence cooling in a thulium-doped solid
with pump excitation at 1.82 μ m< λ< 1.97 μ m. At a pump wavelength of 1.9 μ m and incident …

The optical properties of semiconducting transition metal dichalcogenides are dominated by
both neutral excitons (electron–hole pairs) and charged excitons (trions) that are stable even …

We present an overview of solid‐state optical refrigeration also known as laser cooling in
solids by fluorescence upconversion. The idea of cooling a solid‐state optical material by …

Photon upconversion is an anti-Stokes process in which an absorption of a photon leads to
a reemission of a photon at an energy higher than the excitation energy. The upconversion …

Recent developments in cooling thulium-doped heavy-metal fluoride glass are presented.
Thulium-doped fluorozirconate (ZBLANP) is cooled to 19 K below ambient with a multiple …