Pumped solid-state lasers comprising doped nanocrystal phosphors

Details Pumped solid-state lasers comprising doped nanocrystal phosphors Pumped solid-state lasers comprising doped nanocrystal phosphors

1994-05-20

1995-06-06

Scott, Jr., Leon

Coherent light generators

Particular active media

Plural active media or active media having plural dopants

372 70, 372 74, 372 39, H01S 314

Patent

active

054229073

ABSTRACT:
An optically-pumped or electron-beam-pumped solid-state laser employing as the phosphor material doped nanocrystal particles which as a result of quantum confinement can be caused to exhibit discrete levels in its conduction band that can overlap with the corresponding levels in the doping activator such that resonant energy transfer of excited carriers from the conduction band of the phosphor host to that of the activator will occur. The energy levels in the activator are such as to allow very fast carrier transitions to an intermediate level and a slower radiative transition to a ground state. The result is an energy level structure similar to that of a four-level laser but capable of more efficient conversion of the pumping energy to photon generation.

REFERENCES:
patent: 5038358 (1991-08-01), Rand
patent: 5287373 (1994-02-01), Rapoport et al.

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