New Organic Material of Bis(benzylidene)cycloalkanone Derivatives for Efficient Optical Second-Harmonic Generation

概要

論文の詳細を見る
We have synthesized a series of bis(benzylidene)cycloalkanone derivatives with up to 30 members, and examined their conversion efficiencies of second-harmonic generation (SHG) and related characteristics. As a result, we find that a few derivatives exhibit prominent features in SHG. That is, 2,5-bis(4-methylbenzylidene)cyclopentanone, 2,5-bis(4-bromobenzylidene)cyclopentanone and 2,7-bis(4-methylbenzylidene)cycloheptanone are 30, 20 and 16 times more efficient in SHG, respectively than urea, and they presumably satisfy the criteria required for practical application, concerning phase matching, cutoff wavelength, stability and laser-power tolerance. The crystallographic structures of a few typical compounds are also presented. Furthermore, the difference in effectiveness of the present design principle compared with conventional ones is discussed.
社団法人応用物理学会の論文
1992-02-15