Photonic switching based on the photoinduced birefringence in bacteriorhodopsin films
Abbreviated Journal Title
Appl. Phys. Lett.
ENHANCEMENT; Physics, Applied
Photoinduced birefringence in bacteriorhodopsin films was investigated using pump-probe method and its application for photonic switching explored. A diode-pumped second-harmonic YAG laser was used as a pumping beam and a diode laser at lambda=660 nm was used as a probing beam. The pump and probe beams overlap at the sample. Without the pumping beam, the probing light cannot transmit the analyzer to the detector. However, due to the photoinduced anisotropy, a portion of the probing light is detected when the pumping beam is present. Since lambda=660 nm is far from the absorption peak (similar to570 nm) of the ground state, the photoinduced birefringence predominates. Using the intensity-dependent photoinduced birefringence in a bacteriorhodopsin film, we have demonstrated a photonic switch with similar to1000:1 contrast ratio, similar to0.6 s rise time and similar to1.5 s decay time. (C) 2004 American Institute of Physics.
Applied Physics Letters
"Photonic switching based on the photoinduced birefringence in bacteriorhodopsin films" (2004). Faculty Bibliography 2000s. 4443.