Focus enhancing electromagnetic wave propagating device

Details Focus enhancing electromagnetic wave propagating device Focus enhancing electromagnetic wave propagating device

2009-12-02

2011-12-13

Lepisto, Ryan (Department: 2883)

Optical waveguides

Planar optical waveguide

C385S003000, C359S319000, C359S577000, C356S477000

Reexamination Certificate

active

08078027

ABSTRACT:
A focus enhancing electromagnetic wave propagating device includes a main body formed with a main wave-propagating structure (MS) for focusing an electromagnetic wave into a focusing light spot, and an auxiliary wave-propagating channel (AC) for allowing the wave to propagate toward the focusing light spot. A phase difference is present between the wave after traveling through the MS at its exit end and the wave after traveling through the AC at its exit opening, such that constructive interference is generated at the focusing light spot therebetween. The required phase difference is a function of a distance between the focusing light spot and the exit end of the MS, a distance between the focusing light spot and the exit opening of the AC, velocities of the wave after traveling through each of the MS and the AC, and angular frequencies of the wave after traveling through each of the MS and the AC.

REFERENCES:
patent: 6317536 (2001-11-01), Bhagavatula et al.
patent: 6917736 (2005-07-01), Ersoy

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