| 查看: 902 | 回复: 5 | ||||||
| 【奖励】 本帖被评价4次，作者liuguohua888增加金币 3.2 个 | ||||||
[资源]
光学整流天线 把光直接变成直流电
|
||||||
|
An optical rectenna—a device that directly converts free-propagating electromagnetic waves at optical frequencies to direct current—was first proposed over 40 years ago1, yet this concept has not been demonstrated experimentally due to fabrication challenges at the nanoscale2,3. Realizing an optical rectenna requires that an antenna be coupled to a diode that operates on the order of 1 PHz (switching speed on the order of 1 fs). Diodes operating at these frequencies are feasible if their capacitance is on the order of a few attofarads3,4, but they remain extremely difficult to fabricate and to reliably couple to a nanoscale antenna2. Here we demonstrate an optical rectenna by engineering metal–insulator–metal tunnel diodes, with a junction capacitance of ∼2 aF, at the tip of vertically aligned multiwalled carbon nanotubes (∼10 nm in diameter), which act as the antenna5,6. Upon irradiation with visible and infrared light, we measure a d.c. open-circuit voltage and a short-circuit current that appear to be due to a rectification process (we account for a very small but quantifiable contribution from thermal effects). In contrast to recent reports of photodetection based on hot electron decay in a plasmonic nanoscale antenna7,8, a coherent optical antenna field appears to be rectified directly in our devices, consistent with rectenna theory4,9,10. Finally, power rectification is observed under simulated solar illumination, and there is no detectable change in diode performance after numerous current–voltage scans between 5 and 77 °C, indicating a potential for robust operation. |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : A_carbon_nanotube_optical_rectenna.pdf
- 附件 2 : Infrared_rectification_in_a_nanoantenna-coupled_metal-oxide-semiconductor_tunnel_diode.pdf
2015-11-14 05:09:09, 3.61 M
2015-11-14 05:09:28, 4.07 M
» 收录本帖的淘帖专辑推荐
 好书！好读！ | 新能源 | uicorn3 | sheiry |
» 猜你喜欢
285求调剂
已经有5人回复
-
生物学求调剂
已经有4人回复
-
0854求调剂
已经有3人回复
-
319分085702安全工程求调剂
已经有4人回复
-
生物学308分求调剂（一志愿华东师大）
已经有6人回复
-
085600材料与化工301分求调剂院校
已经有14人回复
-
0703化学调剂325分
已经有12人回复
-
求助071001调剂！！！
已经有5人回复
-
工科370求调剂
已经有3人回复
-
材料专硕322
已经有10人回复
» 本主题相关价值贴推荐，对您同样有帮助:
- 光学整流天线 把光直接变成直流电
已经有1人回复
4楼2015-11-17 13:03:55
简单回复
年初一2楼
2015-11-16 00:04
回复
五星好评 顶一下，感谢分享！
2015-11-16 09:19
回复
五星好评 顶一下，感谢分享！
kings015楼
2017-10-03 19:43
回复
五星好评 顶一下，感谢分享！
kings016楼
2018-07-03 16:16
回复
顶一下，感谢分享！
