Title:
光変調素子、空間光変調器、および空間光変調システム
Document Type and Number:
Japanese Patent JP7002225
Kind Code:
B2
Abstract:
To provide a space optical modulator enabling multi-gradation display with fine pixels having high aperture ratio.SOLUTION: An optical modulation element 1 is configured to, when a ferromagnetic ferroelectric layer 2 vertically receives an electric field from electrodes 3, 4 that are provided at an upper part and lower part of the ferromagnetic ferroelectric layer, change intensity of its magnetization to intensities of magnetization M1, M2 according to intensity of the electric field, as well as the direction of the magnetization. Consequently, a space optical modulator 10 is configured to, for each optical modulation element 1, rotate a direction of polarization at optical rotation angles ±θ1, ±θ2 corresponding to the direction and intensity of the magnetization of the ferromagnetic ferroelectric layer 2, to emit incident light Las light L, L, L, L, and light quantity passing through a polarizer PFo is displayed not only with two value: 0(black), 1(white), but also with a middle tone therebetween.SELECTED DRAWING: Figure 8
Inventors:
Daisuke Kato
Shintaro Aso
Hidekazu Kaneshiro
Nobuhiko Funabashi
Kenichi Aoshima
Kenji Machida
Atsushi Kuga
Hiroshi Kikuchi
Shintaro Aso
Hidekazu Kaneshiro
Nobuhiko Funabashi
Kenichi Aoshima
Kenji Machida
Atsushi Kuga
Hiroshi Kikuchi
Application Number:
JP2017110420A
Publication Date:
February 10, 2022
Filing Date:
June 02, 2017
Export Citation:
Assignee:
Japan Broadcasting Corporation
International Classes:
G02F1/09
Domestic Patent References:
| JP2011123303A | ||||
| JP2017054009A | ||||
| JP2009271210A | ||||
| JP2009139607A | ||||
| JP2013045091A | ||||
| JP2006154727A | ||||
| JP2014038894A |
Foreign References:
| US20020192505 | ||||
| CN102928990A |
Other References:
青島賢一,他,スピン注入型空間光変調器の作製とその評価,第73回応用物理学会学術講演会講演予稿集,2012年09月,p.10-077
FUNABASHI, N., et al.,"Multilevel Transitions of Closely Arranged Spin Valve Pillars Using Spin Transfer Switching",IEEE Transactions on Magnetics,2008年,Vol. 44, No. 11,pp. 2519 - 2522
FUNABASHI, N., et al.,"Multilevel Transitions of Closely Arranged Spin Valve Pillars Using Spin Transfer Switching",IEEE Transactions on Magnetics,2008年,Vol. 44, No. 11,pp. 2519 - 2522
Attorney, Agent or Firm:
Isono International Patent and Trademark Office