As we peer into the next century, we foresee developments in optics that will change our lives in ways that today we can hardly even contemplate.
The role of optics in research, which already cuts across nearly all fields of science and technology, will be limited only by our imagination.
Harnessing Light by National Research Council of US in 1998
To fully explore the utility of light, new theory must be developed for a better understanding of the nature and the behavior of light when interacting with matters; and new materials and devices must be developed for a better control (e.g. in terms of methodology, extent and efficiency) of light. Challenges:
Chiral Photonics Chiral Photonics: Studies making use of the unique chiroptical properties, such as polarization and circular dichroism, of a chiral material as well as of other optical phenomena arose from the unique chiral asymmetric structure for various photonics applications such as lasing, light waveguiding, sensoring, and information storage etc.
Chiral fluorescent sensor
Optical storage media
Chiral Recognition 1-D photonic Ordering Circular Birefringence and Dichroism Helical waveguide usable for selective filtering, scattering and coupling Chiroptical switch triggered by light Feringa, Ben L. et al. Chiral photonics, Inc.
Appropriate introduction of electro/photochromic chromophores into a suitable chiral structure should lead to Electrically or Optically controllable chiroptical properties, which should find wide applications in areas where polarization control is of concern.
Demonstration of electrochemical Switching of CD signals of ( R )-CBEBPB in 0.1 M Bu4NClO4/DMF. (a) first reduction at -0.5 V for 5 s; (b) recovered tetracation by bubbling slowly nitrogen into the solution; (c) second reduction at -0.7 V for 1 min. Demonstration of electrochemical Switching of CD signals of ( R )-CBEBPB by tin. (a) first reduction by tin bubling nitrogen; (b) recovered tetracation by bubbling slowly air into the solution; Repeat (a) and (b) five times.
Near-infrared chiroptical properties ORD caculated from experimental data (a) (b) J.Phys.Chem. A, 2003, 107 , 2524 J.Am.Chem.Soc., 2004, 126 , 7514
R-BEBPB Rotational strength calculated from this diagram.via formula (a). ORD calculated via formula (b).