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公开(公告)号：US20080089642A1
公开(公告)日：2008-04-17
申请号：US11546626
申请日：2006-10-12
CPC分类号： G02B6/1225 , B82Y20/00 , G01N21/45
摘要： Photonic crystal apparatus and a method for fabricating a photonic crystal apparatus. The photonic crystal apparatus includes a photonic crystal having a dielectric body formed of a first dielectric material having relatively high index of refraction, and a periodic lattice in the dielectric body formed of a second dielectric material having a relatively low index of refraction. The second dielectric material comprises a solid-state dielectric material having a dielectric coefficient of about 2.7 or lower for providing a relatively large contrast between the index of refraction of the dielectric body and the index of refraction of the periodic lattice.
摘要翻译： 光子晶体装置及其制造方法。 光子晶体装置包括具有由具有相对较高折射率的第一介电材料形成的电介质体的光子晶体，以及由具有相对较低折射率的第二介电材料形成的电介质体中的周期晶格。 第二电介质材料包括具有约2.7或更低的介电系数的固态电介质材料，用于在介电体的折射率与周期性晶格的折射率之间提供较大的对比度。
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2.发明授权公开(公告)号：US06188768B1
公开(公告)日：2001-02-13
申请号：US09052860
申请日：1998-03-31
IPC分类号： H04L900
CPC分类号： H04L9/0858
摘要： A quantum cryptographic key distribution (QKD) system splits discrete light signals from a laser source into a pair of light pulses that are orthogonally polarized with respect to each other, imparts a phase shift to one or both of these separate pulses during their round trip from the sender to the receiver and back, assures that the return pulses from the receiver are attenuated to single-photon pulses, recombines the phase-shifted pulses at the sender, and then detects from the recombined signal its polarization state, which is representative of the net phase shift imparted by the sender and receiver. The phase modulator at the receiver transmits only one polarization (e.g., vertical), but is used in a manner that permits it to equally modulate both polarization components of an arriving pulse. In this arrangement, when both components of a pulse reach the phase modulator at the receiver, they are both entirely vertically polarized and a phase shift is imparted at that time. This has the advantage that the effect of any time variation or phase errors in the phase modulator will be the same on both components. The key information is decoded at a detection stage at the sender that uses two detectors, one of which detects a first polarization state corresponding to the phase difference between the two phase shifts being 0 and the other of which detects a second polarization state corresponding to the phase difference between the two phase shifts being &pgr;.
摘要翻译： 量子加密密钥分配（QKD）系统将来自激光源的离散光信号分离为相对于彼此正交极化的一对光脉冲，在这些单独脉冲的往返期间将相移置于这些分离脉冲中的一个或两个 发送器到接收器和背部，确保接收器的返回脉冲衰减到单光子脉冲，将发送器处的相移脉冲重新组合，然后从重新组合的信号中检测其偏振态，其代表 发送方和接收方给予的净相移。 接收器处的相位调制器仅传输一个偏振（例如，垂直），但以允许其均匀调制到达脉冲的两个偏振分量的方式使用。 在这种布置中，当脉冲的两个分量到达接收器处的相位调制器时，它们都是完全垂直极化的，并且在那时施加相移。 这具有以下优点：相位调制器中任何时间变化或相位误差的影响在两个部件上都是相同的。 密钥信息在使用两个检测器的发送器处的检测阶段被解码，其中一个检测到与两个相移之间的相位差相对应的第一偏振态，其中另一个检测到对应于 两相间的相位差为π。
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