We have investigated the Stark effect on the spectral hole characteristics in the photochemical hole burning reaction in systems of anthraquinone derivatives, such as 1,4-dihydroxyanthraquinone (DAQ) and 4-amino-2,6-bis(4-butylphenoxy)l,5-dihydroxyanthraquinone (ABDAQ) as guest molecules embedded in host polymers such as 2-hydroxyethyl methacrylate (PHEMA) or poly(vinyl butyral) (PVB). The hole broadening and refilling were observed by applying an external electric field to the samples. Thus, the dipole moment differences [A/~] of the guest molecules between the ground state and the excited state were estimated as follows: 0.38, 0.51 and 0.26D in the DAQ/PHEMA, ABDAQ/PHEMA and ABDAQ/PVB systems, respectively. These material dependent characteristics of [Aft[ have been able to be explained qualitatively by Hammett's substituent constant and the Taft's polar substituent constant. Furthermore, from the application view point, 5 x 5 multiple spectral holes could be formed in both the wavelength and the electric field dimensions at 4.2 K in the ABDAQ/PVB system. This result indicates that high-density data multiplexing can be achieved in both the wavelength and the electric field dimensions using the Stark effect on the spectral holes.
Посилання на статтю:
Stark effect on persistent spectral hole burning and dipole moment characteristics of anthraquinone derivatives doped in polymers / Motomu Yoshimura*, Tetsuya Nishimura, Eiji Yagyu andNoriaki Tsukada // Polymer. – 1992. – Vol 33. – P. 5143-5149.