The dependencies of hot-carrier-induced degradations on the effective channel length Lch,eff are investigated for n-type metal-oxide-semiconductor field effect transistor （MOSFETs）. Our experiments find that, with d...The dependencies of hot-carrier-induced degradations on the effective channel length Lch,eff are investigated for n-type metal-oxide-semiconductor field effect transistor （MOSFETs）. Our experiments find that, with decreasing Lch,eff, the saturation drain current （Iasat ） degradation is unexpectedly alleviated. The further study demonstrates that the anomalous Lch,eff dependence of Idsat degradation is induced by the increasing influence of the substrate current degradation on the lazar degradation with Lch,eff reducing.展开更多
The rare earth-doped active fibers not only have ten thousands of square-micron core-area but also deliver a laser with near-diffraction-limited beam quality. However, they have been studied little. In this paper, we ...The rare earth-doped active fibers not only have ten thousands of square-micron core-area but also deliver a laser with near-diffraction-limited beam quality. However, they have been studied little. In this paper, we design a 200-μm-corediameter Yb^3＋-doped photonic crystal fiber with a large pitch in the air-hole cladding region. Simulations demonstrate that only fundamental mode（FM） with a mode field area（MFA） of ～ 28000 μm^2 can be amplified and propagated at the gain saturation, and the beam quality M^2 is about 1.5. It is predicted that almost 105 m J single-pulse energy is available from such a 1.5-meter-length fiber.展开更多
基金Supported by Hong Kong,Macao and Taiwan Science&Technology Cooperation Program of China under Grant No2014DFH10190the Distinguished Young Scientists Foundation of Jiangsu Province under Grant No BK20130021+1 种基金the National Natural Science Foundation of China under Grant Nos 61204083 and 61306092the Qing Lan Project
文摘The dependencies of hot-carrier-induced degradations on the effective channel length Lch,eff are investigated for n-type metal-oxide-semiconductor field effect transistor （MOSFETs）. Our experiments find that, with decreasing Lch,eff, the saturation drain current （Iasat ） degradation is unexpectedly alleviated. The further study demonstrates that the anomalous Lch,eff dependence of Idsat degradation is induced by the increasing influence of the substrate current degradation on the lazar degradation with Lch,eff reducing.
基金Project supported by the Program for Changjiang Scholars and Innovative Research Team in University,China(Grant No.PCSIRT:1212)the Key Grant Science and Technology Planning Project of Beijing,China(Grant Nos.PXM2013 014224 000077 and PXM2012 014224 000019)the Science and Technology Planning Project of Beijing Municipal Commission of Education,China(Grant No.KM201611232008)
文摘The rare earth-doped active fibers not only have ten thousands of square-micron core-area but also deliver a laser with near-diffraction-limited beam quality. However, they have been studied little. In this paper, we design a 200-μm-corediameter Yb^3＋-doped photonic crystal fiber with a large pitch in the air-hole cladding region. Simulations demonstrate that only fundamental mode（FM） with a mode field area（MFA） of ～ 28000 μm^2 can be amplified and propagated at the gain saturation, and the beam quality M^2 is about 1.5. It is predicted that almost 105 m J single-pulse energy is available from such a 1.5-meter-length fiber.
