搜索结果: 31-45 共查到“国际动态 光学”相关记录282条 . 查询时间(2.088 秒)
美国家实验室开发纳米材料的光谱温度计
美国家实验室 纳米材料 光谱温度计
2018/7/16
美国能源部科学办公室发布消息,能源部橡树岭国家实验室的研究团队发现了一种测量纳米尺度局部温度的新方法。其题为“基于能量增益损耗光谱学利用纳米级电子探针进行温度测量”的论文发表在《物理评论快报》上。这项研究使用新型设备“高能量分辨率单色电子能量增益损失谱扫描透射电子显微镜(HERMES)”,采用了可生成高空间分辨率和高光谱细节图像的电子能量增益光谱学技术。HERMES设备通过直接观察与材料中的热量相...
Single Metalens Focuses All Colors Of The Rainbow In One Point(图)
Single Metalens All Colors Rainbow One Point
2018/1/10
Metalenses — flat surfaces that use nanostructures to focus light — promise to revolutionize optics by replacing the bulky, curved lenses currently used in optical devices with a simple, flat surface....
Scientists Demonstrate One Of Largest Quantum Simulators Yet,With 51 Atoms
Scientists Largest Quantum Simulators Yet 51 Atoms
2017/12/18
Physicists at MIT and Harvard University have demonstrated a new way to manipulate quantum bits of matter. In a paper published today in the journal Nature, they report using a system of finely tuned ...
A faster way to make Bose-Einstein condensates(图)
faster way make Bose Einstein condensates
2017/12/18
The world of an atom is one of random chaos and heat. At room temperatures, a cloud of atoms is a frenzied mess, with atoms zipping past each other and colliding, constantly changing their direction ...
光学微腔可以增强光和物质的相互作用,已经成为基础光物理和光子学研究的重要平台。长期以来,国际上主要通过建立波导模式与微腔高度局域模式的直接相互作用实现有效耦合,需要满足相位匹配条件。然而,由于波导与微腔存在不同的材料和几何色散,相位匹配条件仅在较窄光谱范围内满足,严重制约了微腔宽带光子学应用。人工微结构和介观物理国家重点实验室(北京大学)肖云峰研究员和龚旗煌院士领导的课题组提出混沌辅助的光子动量快...
在俄罗斯科学基金会支持下,俄科院西伯利亚分院克拉斯诺亚尔斯克科学中心和西伯利亚联邦大学的科学家组成的团队开发出一种生物发光酶测试系统,用于评估碳纳米材料的毒性。该系统具有简单、快速、灵敏度高的特点,这项研究成果发表在《体外毒理学》(Toxicology in Vitro)杂志上。
Researchers develop flexible,stretchable photonic devices
Researchers flexible stretchable photonic devices
2017/11/23
Researchers at MIT and several other institutions have developed a method for making photonic devices — similar to electronic devices but based on light rather than electricity — that can bend and str...
There’s nothing new thing under the sun — except maybe light itself.Over the last decade, applied physicists have developed nanostructured materials that can produce completely new states of light exh...
光量子新算法或能实现大规模运算 理论上可处理一百多万个量子比特信息
光量子新算法 量子计算机
2017/10/10
最近,日本科学家发明了一种新的光量子计算方法,通过在光路上连成一列具有时间先后的光脉冲,实现了用最小规模光电路结构有效进行大规模运算操作。从理论上来说,量子计算机的运算速度会远超现有的超级计算机,可用于高速数据库检索、开发功能性材料及药物等各领域。目前世界各国争相开发以原子、离子及超导电路为基础的各种系统通用的量子计算机。
Researchers identify free-flowing aerosol particles using holograms,lasers(图)
Researchers identify free-flowing aerosol particles holograms lasers
2017/10/25
Holographic images of free-flowing air particles may help climate change and biological weapons watchdogs better monitor the atmosphere, according to a recent Kansas State University study.Principle i...
四维超纠缠态光子室外首次传输成功
四维 超纠缠态光子 传输成功
2017/8/25
奥地利科学家成功在两个相距1200米的屋顶间传送了超纠缠态光子,首次在实验室以外的现实世界证明了超纠缠态光子传输的可行性。发表在最新一期《自然·通讯》杂志的这一研究成果,向实现基于卫星系统快速安全传输量子信息的全球化量子网络迈出了重要一步。
UCF Researchers Set Record for Fastest Light Pulse— Again(图)
UCF Researchers Set Record Fastest Light Pulse
2017/9/4
A research team at the University of Central Florida has demonstrated the fastest light pulse ever developed, a 53-attosecond X-ray flash.The group led by Professor Zenghu Chang beat its own record se...
Beware doping athletes!This sensor may be your downfall(图)
doping athletes sensor your downfall
2017/9/1
Scientists searching for traces of drugs, bomb-making components and other chemicals often shine light on the materials they’re analyzing.This approach is known as spectroscopy, and it involves studyi...
New laser design offers more inexpensive multi-color output
New laser design more inexpensive multi-color output
2017/7/24
From checkout counters at supermarkets to light shows at concerts, lasers are everywhere, and they’re a much more efficient light source than incandescent bulbs. But they’re not cheap to produce.A new...
激光单色性新世界纪录诞生
激光单色性 频率 波长
2017/7/4
德国和美国科学家联合创造出了谱线宽度仅10毫赫兹(1毫赫兹为0.001赫兹)的激光,创下激光单色性的新世界纪录。
德国联邦物理技术研究院发布的新闻公报说,这是迄今离理想单色性最近的激光,用它测量原子频率可以让光子钟更加精确,还有助于光谱学和射电天文学研究等。
频率和波长决定着光的颜色,阳光由许多不同频率的光组成,分解后可以形成彩虹。光的频率越单一,单色性越好,在光谱上所占的区域越狭窄。理想的激...