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A built-in self-test scheme for the post-bond test of TSVs in 3D Ics
No full text[[abstract]]Three-dimensional (3D) integration using through silicon via (TSV) has been widely acknowledged as one future integrated-circuit (IC) technology. A 3D IC including multiple dies connected with TSVs offers many benefits over current 2D ICs. However, the testing of 3D ICs is much more difficult than that of 2D ICs. In this paper, we propose a cost-effective built-in self-test circuit (BIST) to test TSVs of a 3D IC. The BIST scheme, arranging the TSVs into arrays similar to memory, has the features of low test/diagnosis time and low silicon area cost. Simulation results show that the area overhead of the BIST circuit implemented with 0.18 mu m CMOS technology for a 16x32 TSV array in which each TSV cell size is 45 mu m(2) is 2.24%. Also, the BIST needs only 130 clock cycles to test the TSV array with stuck-at faults. In comparison with the IEEE 1500-based test approach, the BIST scheme can achieve 85.2% area cost and 93.6% test time reduction.[[fileno]]2030108030217[[department]]電機工程學
A further study on the encoding complexity of quantum stabilizer codes
No full text[[abstract]]In this paper, we investigate the encoding complexity of binary quantum stabilizer codes. When doing the encoding through a “standard generator matrix”, a tight upper bound of the encoding complexity is derived in this paper to indicate that the encoding complexity decreases quadratically as the number r1 of primary generators of the stabilizer group decreases. A class of equivalent transformations on stabilizer codes is explored to reduce the number r1 of primary generators. The minimum possible r1 is determined for several classes of optimal stabilizer codes of distance two or three and for some codes of length n ≤ 12. It appears that a code with large minimum distance will have large r1, reflecting high encoding complexity.[[fileno]]2030104030039[[department]]電機工程學
Silicon-based planar phase modulators fabricated on silicon-on-insulator
No full text[[fileno]]2030180030053[[department]]電機工程學
A gold-nanorod based dual modal – photoacoustic and ultrasound – contrast enhanced imaging technique for monitoring focusedultrasound induced blood-brain-barrier opening
No full text[[fileno]]2030143030059[[department]]電機工程學
Room-temperature condensation of exciton-polaritons in GaAs based optical microcavities
No full text[[fileno]]2030192030002[[department]]電機工程學
Silicon-On-Insulator Grating Coupler with Low Back-Reflection
No full text[[abstract]]We design and fabricate an efficient broadband grating coupler (GC) on a 400nm-thick silicon-on-insulator (SOI) wafer. The measured coupling loss is 2.7dB when coupling to a single-mode fiber (SMF) at 1310nm wavelength with TE polarization. 1dB-full-width and back-reflection are determined to be 30nm and -30dB, respectively.[[fileno]]2030192030009[[department]]電機工程學
Four-wave mixing analysis of quantum dot and quantum well lasers
Get PDF[[abstract]]In this paper, we characterize and compare a quantum dot and a quantum well lasers using the four-wave mixing analysis. The optical and power spectra of the four-wave mixing state in the quantum dot laser are studied both numerically and experimentally. The tendency of the amplitude versus detuning in the quantum dot laser is very similar to those seen in the quantum well laser. The four-wave mixing signals and the power spectra from both lasers are symmetric, while asymmetry in the regenerated signal is found. Compared to the quantum well lasers, the higher resonance peak of the regenerated signal of the quantum dot lasers appears on the opposite side of the detuning in the optical spectra. The intrinsic parameters of the lasers are also obtained by fitting the optical spectra and power spectra obtained experimentally with those derived directly from the rate equations. The measured value of the linewidth enhancement factor has a good agreement with that obtained by the injection locking method.[[fileno]]2030181030030[[department]]電機工程學
Forward and backward THz difference frequency generation with idler loss exceeding parametric gain
No full text[[abstract]]When the idler absorption loss exceeds parametric gain in THz DFG, the THz wave can still grow monotonically versus crystal length for forward DFG but saturates within a few absorption lengths for backward DFG.[[fileno]]2030181030032[[department]]電機工程學
Self-learning-based rain streak removal for image/video
No full text[[abstract]]Rain removal from an image/video is a challenging problem and has been recently investigated extensively. In our previous work, we have proposed the first single-image-based rain streak removal framework via properly formulating it as an image decomposition problem based on morphological component analysis (MCA) solved by performing dictionary learning and sparse coding. However, in this previous work, the dictionary learning process cannot be fully automatic, where the two dictionaries used for rain removal were selected heuristically or by human intervention. In this paper, we extend our previous work to propose an automatic self-learning-based rain streak removal framework for single image. We propose to automatically self-learn the two dictionaries used for rain removal without additional information or any assumption. We then extend our single-image-based method to video-based rain removal in a static scene by exploiting the temporal information of successive frames and reusing the dictionaries learned by the former frame(s) in a video while maintaining the temporal consistency of the video. As a result, the rain component can be successfully removed from the image/video while preserving most original details. Experimental results demonstrate the efficacy of the proposed algorithm.[[fileno]]2030144030090[[department]]電機工程學
Image super-resolution via feature-based affine transform
No full text[[abstract]]State-of-the-art image super-resolution methods usually rely on search in a comprehensive dataset for appropriate high-resolution patch candidates to achieve good visual quality of reconstructed image. Exploiting different scales and orientations in images can effectively enrich a dataset. A large dataset, however, usually leads to high computational complexity and memory requirement, which makes the implementation impractical. This paper proposes a universal framework for enriching the dataset for search-based super-resolution schemes with reasonable computation and memory cost. Toward this end, the proposed method first extracts important features with multiple scales and orientations of patches based on the SIFT (Scale-invariant feature transform) descriptors and then use the extracted features to search in the dataset for the best-match HR patch(es). Once the matched features of patches are found, the found HR patch will be aligned with LR patch using homography estimation. Experimental results demonstrate that the proposed method achieves significant subjective and objective improvement when integrated with several state-of-the-art image super-resolution methods without significantly increasing the cost.[[fileno]]2030144030093[[department]]電機工程學