PHOTODIODE

专利名称：PHOTODIODE

发明人：TAKEZOE, HIDEO,PARK,

BYOUNGCHOO,SONG, MYOUNG

HOON,HWANG, JISOO,TOYOOKA,

TAKEHIRO,NISHIMURA, SUZUSHI 申请号：EP05781398

申请日：20050902

公开号：EP1791004A4

公开日：

20100609

专利内容由知识产权出版社提供

摘要：An optical diode which can lower the cost and save electric power is provided. An optical diode 21 of the present invention comprises a cholesteric liquid crystal (CLC) layer 2 having a selective reflection wavelength band with a left-handed helical structure, and a phase shifter 24 for changing the phase difference between two intrinsic polarized light components of left-handed circularly polarized light having a wavelength within the selective reflection wavelength band of the CLC layer 2. When left-handed circularly polarized light having a wavelength within the selective reflection wavelength band of the CLC layer 2 is incident on the phase shifter 24 in the optical diode 21, for example, the phase shifter 24 turns the left-handed circularly polarized light into right-handed circularly polarized light, this right-handed circularly polarized light can be transmitted through the CLC layer 2. When left-handed circularly polarized light having a wavelength within the selective reflection wavelength band of the CLC layer 2 is incident on the CLC layer 2, on the other hand, this left-handed circularly polarized light is selectively reflected by the CLC layer 2. Thus, an optical diode characteristic is realized. This optical

diode 21 does not require a large amount of time and labor to manufacture. Further, since no nonlinear optical effect is utilized, it is not necessary for laser light having such a high intensity as to cause the nonlinear optical effect to be incident as incident light.

申请人：TOKYO INSTITUTE OF TECHNOLOGY,NIPPON OIL CORPORATION

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