Ultrafast all-optical switch using complex refractive index changes of thin films containing photochromic dye

1997 ◽  
Vol 71 (4) ◽  
pp. 434-436 ◽  
Author(s):  
Kyoichi Sasaki ◽  
Toshihiko Nagamura
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Optical Switch ◽  
Complex Refractive Index ◽  
Photochromic Dye ◽  
All Optical ◽  
Index Changes ◽  
All Optical Switch

All-optical switch and modulator using photochromic dye doped polymer waveguides

2003 ◽  
Vol 21 (1-3) ◽  
pp. 543-548 ◽  
Author(s):  
Jae-Wook Kang ◽  
Eunkyoung Kim ◽  
Jang-Joo Kim
Keyword(s):  
Optical Switch ◽  
Polymer Waveguides ◽  
Photochromic Dye ◽  
All Optical ◽  
All Optical Switch ◽  
Doped Polymer

ALL-OPTICAL REFLECTANCE CONTROL BASED ON PHOTOINDUCED COMPLEX REFRACTIVE INDEX CHANGES IN GUIDED MODE THIN FILMS CONTAINING INDIUM OR GALLIUM PHTHALOCYANINES

2002 ◽  
Vol 11 (03) ◽  
pp. 205-218 ◽  
Author(s):  
TOSHIHIKO NAGAMURA ◽  
ATSUSHI NAITO ◽  
IORI YOSHIDA ◽  
YU CHEN ◽  
MICHAEL HANACK
Keyword(s):  
Thin Film ◽  
Refractive Index ◽  
Complex Refractive Index ◽  
Nanosecond Laser ◽  
Polymer Thin Film ◽  
Optical Reflectance ◽  
Guided Mode ◽  
All Optical ◽  
Silver Thin Film ◽  
Index Changes

Tetrasubstituted indium or gallium phthalocyanines and their dimers bridged with various ligands were dispersed in a polymer thin film, which was spin-coated on silver thin film vacuum-evaporated on a glass slide. All-optical reflectance control was achieved by complex refractive index changes upon photoexcitation of phthalocyanines by nanosecond laser in such a guided mode geometry. They gave rise in less than ns pulse width, and a few to a few tens of microseconds decay characteristic to the lifetime of the excited triplet state. Repeated and reversible reflectance changes were achieved. Axially bridged phthalocyanine dimers showed almost the same photoresponses as monomers.

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