Acoustically induced optical second harmonic generation in InAs crystals

✍ Scribed by M. Makowska-Janusik; A. Hruban; J. Ebothe; I. V. Kityk

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 132 KB
• Volume: 40
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200410335

✦ Synopsis

Acoustically induced optical second harmonic generation (AIOSHG) in InAs single crystals was investigated. With increasing acoustical power, the AIOSHG for fundamental CO laser light (λ=7.1 µm) increases and achieves its maximum value at acoustical power density about 1.70 W/cm 2 . The value of the AIOSHG for InAs was substantially higher than for key inorganic photo-refractive and ferroelectrics materials. With decreasing temperature, the AIOSHG signal strongly increases below 42 K. The AIOSHG maxima were observed at acoustical frequencies ranged at 7-11 kHz. Comparing the obtained results with the acoustically induced IR spectra at low temperature, one can conclude that the observed effect is associated with acoustically-induced phase transformations.