Wenyong Deng

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Move-based iterative improvement partitioning methods such as the Fiduccia-Mattheyses (FM) algorithm and Krishnamurthy's Look-Ahead (LA) algorithm are widely used in VLSI CAD applications largely due to their time efficiency and ease of implementation. This class of algorithms is of the "local improvement" type. They generate relatively high quality results(More)
Move-based iterative improvement partitioning (IIP) methods, such as the Fiduccia-Mattheyses (FM) algorithm [Fidducia and Mattheyses 1982] and Krishnamurthy's Look-Ahead (LA) algorithm [Krishnamurthy 1984], are widely used in VLSI CAD applications, largely due to their time efficiency and ease of implementation. This class of algorithms is of the(More)
Iterative-improvement 2-way min-cut partitioning is an important phase in most circuit placement tools, and finds use in many other CAD applications. Most iterative improvement techniques for circuit netlists like the FiducciaMattheyses (FM) method compute the gains of nodes using local netlist information that is only concerned with the immediate(More)
Subwavelength amorphous silicon transmission gratings with a period from 100 to 800 nm and a thickness of 180 nm on silica substrates have been fabricated and studied. For a normal incident light ~l5633 nm!, in addition to strong birefringence ~as large as 170° in phase difference!, it was observed that the transmission of TE ~the electric field parallel to(More)
We present the first fabrication and investigation of visible-light subwavelength transmission gratings in high refractive index materials ~e.g., amorphous silicon! on silica substrates. The gratings have periods ranging from 100 to 800 nm in 50 nm increments, a thickness of 180 nm ~very thin!, and they were fabricated using electron-beam lithography and(More)
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