• 专利标题:   Optical-limiter useful in anti-glare treated device, comprises chemically functionalized graphene spaced apart as single sheets in transparent liquid cell/solid thin film, where chemical functionalization has substoichiometric oxidation.
  • 专利号:   WO2012091679-A1, US2013273345-A1, SG191416-A1, SG10201510602-A1
  • 发明人:   CHUA L, HO P, LIM G K
  • 专利权人:   UNIV SINGAPORE NAT, DSO NAT LAB, DSO NAT LAB, UNIV SINGAPORE NAT
  • 国际专利分类:   B82Y020/00, G02B001/00, G02B005/22, G02F001/35, G02F001/361
  • 专利详细信息:   WO2012091679-A1 05 Jul 2012 G02B-001/00 201247 Pages: 38 English
  • 申请详细信息:   WO2012091679-A1 WOSG000452 28 Dec 2011
  • 优先权号:   US427570P, US13977366

▎ 摘  要

NOVELTY - The optical-limiter comprises chemically functionalized graphene spaced apart as single sheets in a transparent liquid cell or solid thin film. The chemical functionalization comprises both substoichiometric oxidation and attachment of surface modifier groups. The polymer or sol-gel materials such as silica titania and silsequioxanes contains heavy-atom, electron withdrawing or electron donating group. The solid thin film is formed by chemically functionalized graphenes that are spaced apart by greater than a few molecular diameter. USE - The optical-limiter is useful in a device such as an anti-glare treated device and a sensor protected with pulse shaping (claimed). ADVANTAGE - The optical-limiter exhibits less transmittance and increased performance, and protects the optical and focal-plane array sensors from irreversible damage by intense pulses thus enhancing lifespan of the sensor. DETAILED DESCRIPTION - The optical-limiter comprises chemically functionalized graphene spaced apart as single sheets in a transparent liquid cell or solid thin film. The chemical functionalization comprises both substoichiometric oxidation and attachment of surface modifier groups. The polymer or sol-gel materials such as silica titania and silsequioxanes contains heavy-atom, electron withdrawing or electron donating group. The solid thin film is formed by chemically functionalized graphenes that are spaced apart by greater than a few molecular diameter. An optical-limiting mechanism occurs by excited state absorption. Onset of the nonlinear optical limiting effect in the thin film or liquid cell is less than10mJ/cm2 when the linear transmittance is 50-90%. An INDEPENDENT CLAIM is included for a method of fabricating an optical response material.