Observation of magnetoelectric linear birefringence

Area of Science:

• Physics
• Physical Chemistry

Background:

• Optical linear birefringence is a well-known optical phenomenon.
• Birefringence is typically induced by electric fields (Kerr effect) or magnetic fields (Cotton-Mouton effect) independently.

Purpose of the Study:

• To experimentally observe optical linear birefringence induced by the combined effect of crossed electric and magnetic fields.
• To investigate the relationship between the induced birefringence and the applied electric and magnetic fields.

Main Methods:

• Experimental setup involving molecular liquids subjected to perpendicular electric and magnetic fields.
• Measurement of optical linear birefringence using polarized light propagation perpendicular to the fields.

Main Results:

• First experimental observation of optical linear birefringence induced by crossed electric and magnetic fields.
• The induced optical axes align with the external fields.
• The strength of the birefringence is found to be bilinear in the electric and magnetic field strengths.

Conclusions:

• The simultaneous application of crossed electric and magnetic fields induces a novel form of optical linear birefringence in molecular liquids.
• This effect offers a new pathway for controlling and understanding light-matter interactions in condensed phases.