Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Bell Labs H5

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Bell Labs H5

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Image title: 
Laser evidence
Credit line: 
Bell Laboratories / Alcatel-Lucent USA Inc., courtesy AIP Emilio Segrè Visual Archives, Physics Today Collection

Unmistakable evidence that a laser light for the first time has stimulated a specific chemical reaction is revealed in the infrared spectra above which compares the frequency of (a) styrene monomer, (b) commercial polystyrene, and (c) laser induced polystyrene. Dr. Yo-Han Pao and Dr. Peter Rentzepis of Bell Telephone Laboratories succeeded in changing monomer styrene to polystyrene with light from a ruby laser.

Photo date: 
March 1965
Original format: 
1 photographic print (black and white; 8 x 10 inches)
Bell Labs Innovations