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《半导体物理学》课程教学改革探讨
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作者 龚高尚 王永强 +1 位作者 魏茂才 伦蒙蒙 《中文科技期刊数据库(全文版)教育科学》 2024年第11期065-068,共4页
《半导体物理学》是高等院校材料物理类专业的主要专业课程之一,该课程涉及的知识内容繁多,理论性和系统性也较强,因此对大多数学生而言该课程学习起来具有一定难度。另外,因课时限制等因素,不少教师在该课程的教学过程当中普遍还存在... 《半导体物理学》是高等院校材料物理类专业的主要专业课程之一,该课程涉及的知识内容繁多,理论性和系统性也较强,因此对大多数学生而言该课程学习起来具有一定难度。另外,因课时限制等因素,不少教师在该课程的教学过程当中普遍还存在着讲解不够深入,所讲解内容枯燥乏味,因而导致学生普遍学习兴趣不是很高,求知欲望不是很强,这就使得在该课程学习完成后学生对相关知识掌握不够牢靠。基于以上问题,本论文深入探讨了在当前的教育模式下,教师如何从改变授课方式,合理分配不同内容的授课时间,理论与实践结合等方面进行课程教学改革的方式方法,以不断提高《半导体物理学》的教学质量。 展开更多
关键词 《半导体物理学》 教育改革 理论与实践
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Interaction of a Surface Acoustic Wave with a Two-dimensional Electron Gas 被引量:1
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作者 YANG Shi-Jie ZHAO Hu YU Yue 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第6X期1095-1098,共4页
When a surface acoustic wave (SAW) propagates on the surface of a GaAs semiconductor, coupling between electrons in the two-dimensional electron gas beneath the interface and the elastic host crystal through piezoel... When a surface acoustic wave (SAW) propagates on the surface of a GaAs semiconductor, coupling between electrons in the two-dimensional electron gas beneath the interface and the elastic host crystal through piezoelectric interaction will attenuate the SAW. The coupling coemcient is ~alculated for the SAW propagating along an arbitrary direction. It is found that the coupling strength is strongly dependent on the propagating direction. When the SAW propagates along the [011] direction, the coupling becomes quite weak. 展开更多
关键词 surface acoustic wave piezoelectric coupling
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Vibration Spectrums of Polar Interface Optical Phonons in GaAs/AlAs Cylindrical Quantum Dots
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作者 ZHANGLi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第2期333-336,共4页
The dispersions of the top interface optical phonons and the side interface optical phonons in cylindrical quantum dots are solved by using the dielectric continuum model. Our calculation mainly focuses on the frequen... The dispersions of the top interface optical phonons and the side interface optical phonons in cylindrical quantum dots are solved by using the dielectric continuum model. Our calculation mainly focuses on the frequency dependence of the IO phonon modes on the wave-vector and quantum number in the cylindrical quantum dot system.Results reveal that the frequency of top interface optical phonon sensitively depends on the discrete wave-vector in z direction and the azimuthal quantum number, while that of the side interface optical phonon mode depends on the radial and azimuthal quantum numbers. These features are obviously different from those in quantum well, quantum well wire,and spherical quantum dot systems. The limited frequencies of interface optical modes for the large wave-vector or quantum number approach two certain constant values, and the math and physical reasons for this feature have been explained reasonably. 展开更多
关键词 phonon modes vibration spectrums cylindrical quantum dots
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Efficient Mode-locked and Q-switched Nd∶YVO_4 Laser with Semiconductor Saturable Absorber Mirror
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作者 LIU Shi-hua HONG Zheng-ping +7 位作者 WANG Chun-hui WANG Guang-gang LI Lei LIU Shu-shan LIU Min LIU Jie WANG Yong-gang QIN Lian-jie 《Semiconductor Photonics and Technology》 CAS 2007年第4期294-297,304,共5页
We reported an efficient diode pumped Nd∶YVO4 1 064 nm laser passively mode-locked and Q-switched by a semiconductor saturable absorber mirror(SESAM). At the incident pump power of 7.5 W, 2.81 W average output power ... We reported an efficient diode pumped Nd∶YVO4 1 064 nm laser passively mode-locked and Q-switched by a semiconductor saturable absorber mirror(SESAM). At the incident pump power of 7.5 W, 2.81 W average output power was obtained during stable CW mode locking with a repetition rate of 111 MHz. The optical conversion efficiency was 37.5%, and the slope efficiency was 39%. So far as we know, this is the highest optical-optical conversion efficiency with a SESAM at home. 展开更多
关键词 Diode-pumped lasers Nd YVO4 MODE-LOCKED SESAM.
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Propagation of Ultra-fast Femtosecond Pulses in Silicon-on-insulator Optical Waveguides
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作者 WU Jian-wei LUO Feng-guang Cristiano de Mello Gallep 《Semiconductor Photonics and Technology》 CAS 2007年第4期261-267,共7页
A complete theoretical modeling, avoiding any priori-assumption, is deduced and demonstrated for ultra-fast femtosecond optical pulses in silicon-on-insulator optical waveguides which includes the group velocity dispe... A complete theoretical modeling, avoiding any priori-assumption, is deduced and demonstrated for ultra-fast femtosecond optical pulses in silicon-on-insulator optical waveguides which includes the group velocity dispersion, third-order dispersion, self-phase and cross-phase modulations, self-steepening and shock formation, Raman depletion, propagation loss, two-photon absorption, free-carrier absorption, and free-carrier dispersion. Finally, the temporal and spectral characteristics of 100 fs optical pulses at 1.55 μm are numerically observed in 5-mm-long waveguides while considering different initial chirps and incident peak intensity levels. 展开更多
关键词 integrated optics SILICON-ON-INSULATOR ultrafast optics
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