Even if the researchers succeed in that task, the resulting device would be considered an optically pumped laser
, which works only when an external light source stimulates it.
Gould, retired and living in Kinsale, Va., also recently won a 10-year court battle to uphold his patent for an optically pumped laser
amplifier (SN: 3/20/82, p.199).
Optically pumped lasers
have been achieved from various ZnO micro/nanostructures, such as thin films , powders , microtubes , nano/microwires [4-6], nanobelts , nanonails , microspheres , and nano/microdisks [10,11] by single-photon absorption in which ZnO serves as both active gain medium and optical resonant cavity.