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Chinese Optics Letters 2020年第11期18卷 22-26页

作者： Gongqing Li Xiaofeng Duan Yongqing Huang Kai Liu xiaomin ren State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

We proposed a method to form a flat transmitted serrated-phase(SP) high-contrast-index subwavelength grating(HCG) beam splitter(HBS) for all dielectric materials, which is to alternately arrange two kinds of grating bars with a phase difference of π. Compared to the typical linear-phase(LP) HBS, which consists of two symmetrical deflecting gratings, the SP-HBS is extensible in size, and can achieve excellent splitting ability regardless of normal incidence or small-angle oblique incidence with large deflection angles, higher diffraction efficiency,lower energy loss, and higher tolerance of fabrication accuracy. Furthermore, the incident light can be split in half at any part of the SP-HBS, and the output beams of light maintain the original shape. In this Letter, we designed an SP-HBS with a 44.8° deflection angle and a 90.28% transmissivity.

关键词： beam splitter high-contrast-index subwavelength grating serrated-phase profile splitting ability

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钢琴演奏中的主体失落

交响（西安音乐学院学报） 2010年第1期29卷 96-99页

作者：任筱敏星海音乐学院广东广州510006

意义不会自然生成,一切事物的意义都是人赋予的,它需要主体的求索,这就是演奏角色的责任。但人若没有丰富的文化滋养,就不能恰如其分地深刻揭示音乐的内容,因为乐谱只是能指、文本,只有将能指和主体积极的情感体验、背景知识结合起来,... 详细信息

意义不会自然生成,一切事物的意义都是人赋予的,它需要主体的求索,这就是演奏角色的责任。但人若没有丰富的文化滋养,就不能恰如其分地深刻揭示音乐的内容,因为乐谱只是能指、文本,只有将能指和主体积极的情感体验、背景知识结合起来,才能理解音乐的所指和本文。教师应注意早早地为学生打好各种技术基础,在日常生活的操作和钢琴演奏的放松中找回自己,用理性在音乐表现中找回任意而为的自己,用情感体验在音乐表现中找回自己,用富于个性的创造在音乐表演中找回自己。

关键词：钢琴演奏主体失落放松理性情感体验个性创造

A New Wavelength Selective Photoreceiver

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Chinese Journal of Lasers 2000年第5期9卷 51-55页

作者： LIU Kai HUANG Yongqing ren xiaomin LI Jianxin GUO Wei (Optical Communication Center, Beijing University of Posts and Telecommunications, Beijing 100876, China)MA Xiaoyu KANG Xuejun LIAO Qiwei (Institute of Semiconductor, The Chinese Academy of 北京邮电大学北京中科院半导体所北京

A new kind of wavelength selective photoreceiver is proposed. It was constructed by a Fabry Perot (F P) etalon filter and a resonant cavity enhanced (RCE) photodetector. The photoreceiver′s spectral response is determined by the F P etalon filter with a FWHM of less than 4 nm. Moreover, with such a photoreceiver, the transmission loss of the F P etalon filter can be compensated to some extent. And this will benefit its applications.

关键词： wavelength selection photodetector WDM and optoelectronics device

Quasi-resonant cavity enhanced photodetector with a subwavelength grating

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Chinese Optics Letters 2022年第3期20卷 18-23页

作者： Gongqing Li Xiaofeng Duan Weifang Yuan Yongqing Huang Kai Liu xiaomin ren State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

We designed a tunable wavelength-selective quasi-resonant cavity enhanced photodetector(QRCE-PD)based on a high-contrast subwavelength grating(SWG).According to simulation results,its peak quantum efficiency is 93.2%the 3 dB bandwidth is 33.5 GHz,the spectral linewidth is 0.12 nm,and the wavelength-tuning range is 28 nm(1536-1564 nm).The QRCE-PD contains a tunable Fabry-Perot(F-P)filtering cavity(FPC),a symmetrical SWG deflection reflector(SSWG-DR),and a built-in p-i-n *** FPC and the SSWG-DR form an equivalent multi-region F-P cavity together by multiple mutual mirroring,which makes the QRCE-PD a multi-region resonant cavity enhanced ***,QRCE-PD relies on the multiple-pass absorption enhanced effect to achieve high quantum efficiency,rather than the resonant cavity enhanced *** new photodetector structure is significant for the application in the dense wavelength division multiplexing systems.

关键词： photodetector quasi-resonant cavity subwavelength grating ultra-narrow linewidth

316L不锈钢表面耐高温氧化涂层的制备与性能

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材料科学与工艺 2014年第1期22卷 105-109页

作者：樊新民任小敏南京理工大学材料科学与工程学院南京210094

采用溶胶-凝胶法,以异丙醇铝为前驱体制备Al2O3溶胶,浸渍提拉后800℃下真空烧结,在316L奥氏体不锈钢表面制备出无裂纹的Al2O3涂层,研究涂层层数对316L奥氏体不锈钢高温抗氧化性能的影响.通过XRD和DSC对干凝胶粉末进行分析,并使用SEM研究... 详细信息

采用溶胶-凝胶法,以异丙醇铝为前驱体制备Al2O3溶胶,浸渍提拉后800℃下真空烧结,在316L奥氏体不锈钢表面制备出无裂纹的Al2O3涂层,研究涂层层数对316L奥氏体不锈钢高温抗氧化性能的影响.通过XRD和DSC对干凝胶粉末进行分析,并使用SEM研究Al2O3涂层表面形貌特征.涂层的高温抗氧化性能则使用氧化称重法来表征,对比有涂层试样和空白试样在高温氧化环境中的增重比.结果表明:制备出的涂层Al2O3颗粒均匀细小,有效阻止了氧化的进程,提拉3次制备的涂层的抗高温氧化效果最佳,在800℃使用的情况下至少延缓氧化时间165 h.

关键词：溶胶-凝胶法 316L不锈钢浸渍提拉 Al2O3 涂层高温氧化

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Ⅲ-Ⅴ族纳米线及其异质结构:生长与应用

北京邮电大学学报 2022年第3期45卷 1-6,25页

作者：颜鑫张霞任晓敏北京邮电大学信息光子学与光通信国家重点实验室北京100876

由于独特的结构特征和新颖的物理特性,Ⅲ-Ⅴ族纳米线一直是半导体光电子学领域的研究热点。近年来,Ⅲ-Ⅴ族纳米线及其异质结构的制备取得了长足的进步,并在新一代激光器、探测器、太阳能电池等光电子器件中展现出巨大的应用潜力。归纳... 详细信息

由于独特的结构特征和新颖的物理特性,Ⅲ-Ⅴ族纳米线一直是半导体光电子学领域的研究热点。近年来,Ⅲ-Ⅴ族纳米线及其异质结构的制备取得了长足的进步,并在新一代激光器、探测器、太阳能电池等光电子器件中展现出巨大的应用潜力。归纳了近期Ⅲ-Ⅴ族纳米线的主要研究进展,包括Ⅲ-Ⅴ族纳米线的可控生长技术、Ⅲ-Ⅴ族纳米线异质结构的制备途径与物理特性、Ⅲ-Ⅴ族纳米线光电子器件的主要进展等,并展望了就该领域的主要挑战和发展方向。

关键词： Ⅲ-Ⅴ族纳米线异质结构激光器探测器太阳能电池

Integrated optoelectronic chip pair for transmitting and receiving optical signals simultaneously

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Chinese Optics Letters 2019年第4期17卷 52-56页

作者： Kai Liu Qi Wei Yongqing Huang Xiaofeng Duan Qi Wang xiaomin ren Shiwei Cai State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

An integrated optoelectronic chip pair, which can transmit and receive optical signals simultaneously, is proposed in this Letter. The design and optimization of its key structure, the vertical cavity surface emitting laser's distributed Bragg reflector, are presented. Analysis is also done for its influence on the integrated chip's performance. Moreover, the chip pair's performance under dynamic conditions is analyzed. Their 3 dB modulation bandwidths are higher than 10 GHz, and their 3 dB photo-response bandwidths are around 23 GHz. Their applications will further improve the performances of the optical interconnects.

关键词： integrated optoelectronic proposed in this Letter applications

Bias-free operational monolithic symmetric-connected photodiode array

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Chinese Optics Letters 2020年第1期18卷 90-94页

作者： Dan Yang Yongqing Huang Tao Liu Xiaokai Ma Xiaofeng Duan Kai Liu xiaomin ren Institute of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

We have designed and fabricated zero-bias operational two-element symmetric-connected photodetector arrays(SC-PDAs).The designed SC-PDAs have higher saturation currents,larger RF power,and better frequency responses than the single photodetector(PD)under zero *** bias-free SC-PDA with 15μm diameter of each PD demonstrated a 3 d B bandwidth of 19.4 GHz at 0.5 m *** RF saturation photocurrent and maximum RF output power of the SC-PDA with 40μm,50μm,and 60μm diameters under zero bias are over9.31 m A and-5.86 d Bm at 3 GHz,14.52 m A and 1.17 d Bm at 1 GHz,and 13.72 m A and-1.76 d Bm at 1 GHz,respectively.

关键词： photodetectors photodiode array microwave photonics

Two structure interleavers with flat-top spectral response

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Two structure interleavers with flat-top spectral response