sentences:  In 1997 he was joined by long-time collaborator Viktor B. Khalfin, a semiconductor physics theorist.Garbuzov continued to advance the performance of semiconductor devices at both institutions and later became a Senior Member of Technical Staff at Sarnoff Corporation, where he remained until May 2000.At Sarnoff, Garbuzov worked on antimonide-based lasers demonstrating record wavelengths of 2.7 µm.