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Orientational Ratchets and Angular Momentum Balance in the Janossy Effect

 

作者: P. Palffy-muhoray,   E Weinan,  

 

期刊: Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals  （Taylor Available online 1998）
卷期: Volume 320, issue 1  

页码: 193-206

 

ISSN:1058-725X

 

年代: 1998

 

DOI:10.1080/10587259808024395

 

出版商: Taylor & Francis Group

 

关键词: nonlinear optics;liquid crystals;dye;orientational ratchet;Brownian motor;Janossy effect;angular momentum balance

 

数据来源: Taylor

 

摘要:

In the Janossy effect, the threshold intensity for the optical Freedericksz transition in nematic liquid crystals is dramatically reduced by the addition of a small amount of dichroic dye to the sample. We examine the source of torques in the system and the balance of angular momentum. We show that, due to the presence of the dye, the system is an optically pumped orientational ratchet.

 

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