Non-reciprocal feature from an advanced organic thin film

The chiral conjugated phenylene bisthiophenylpropynone able to self-assemble into ordered structures, depicts highly circularly polarized light absorption with opposite handedness from its two opposite faces.

Clear cavity-enhanced CD is observed in the resonance peak!

The spin-coated polymer layer (PVA) is used to control the cavity resonance position as its thickness can be accordingly adjusted.

The enhancement is 8-15 with agreement with the theory!