Word: gallium
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Dates: during 1960-1969
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...captain of the squash team, is studying ways to reduce underwater boundary-layer drag on submarines, for example. Others are pondering modern Argentine history, the future use of lasers in naval gunnery, the effect of radiation on transistors, the accuracy of navigational methods, and a potential heteropoly acid combining gallium and tungsten. The young scholars range far off base, from the Bell Telephone labs to a nuclear sub cruise...
...Mount Wachusett, a modest peak (alt. 2,006 ft.) 34 miles from Lincoln Lab. The first long-distance experiments were not successful, mostly because of hastily assembled equipment. After many months of work, an improved transmitter pointed at Lincoln Laboratory from Mount Wachusett. The tiny gallium arsenide diode, only 0.01 in. in diameter, was placed precisely at the focus of a 5-in. reflecting telescope that concentrated its infra-red light into a tight bundle. On the roof of the lab, the researchers set up their receiver-the reflector of a 5-ft. war-surplus searchlight with a sensitive photocell...
...breakthrough had come as Physicist Robert J. Keyes checked on the properties of a gallium arsenide diode developed by Lincoln Lab Engineer Theodore M. Quist. A less-than-gnat-sized electronic device that generates pure infra-red light when a small direct current is passed through it, the diode turned out to have an extraordinary property: the intensity of the normally invisible infra-red beam could be easily controlled by varying the strength of the current that generates it. Keyes speculated that if his little light beam was visible at any distance, it could be modulated to carry the human...