公开(公告)号：US5625617A

公开(公告)日：1997-04-29

申请号：US523884

申请日：1995-09-06

申请人： Leslie C. Hopkins ,  Cherry A. Murray ,  Afshin Partovi ,  David R. Peale ,  Hsi-jen J. Yeh ,  George J. Zydzik

发明人： Leslie C. Hopkins ,  Cherry A. Murray ,  Afshin Partovi ,  David R. Peale ,  Hsi-jen J. Yeh ,  George J. Zydzik

IPC分类号： G01N37/00 ,  G01N21/01 ,  G01Q60/18 ,  G01Q60/22 ,  G01Q80/00 ,  G11B7/12 ,  G11B7/135 ,  H01S5/00 ,  H01S5/026 ,  H01S5/028 ,  H01S5/10 ,  H01S5/183 ,  G11B7/00

CPC分类号： G11B7/12 ,  G11B7/122 ,  G11B7/1387 ,  H01S5/028 ,  H01S5/1082 ,  H01S5/18394 ,  B82Y20/00 ,  G01Q80/00 ,  H01S2301/18 ,  H01S5/0286

摘要： Near-field optical apparatus according to the invention contains a novel semiconductor laser photon source. The source is capable of providing substantially higher photon flux than prior art near field sources, potentially facilitating read-out rates in the megahertz range in exemplary near-field data storage and retrieval apparatus. The novel source comprises a non-uniform laser emission face, with the emission face configured such that at least 50% of the total radiation emission is from a small (first) region of the emission face, of width less than .lambda..sub.s /2, where .lambda..sub.s is the emission wavelength of the laser. In an exemplary embodiment, a multilayer coating is provided on the emission face, such that radiation emission from the face is relatively low. A recess is formed in the coating such that substantial radiation emission from the recess occurs. The recess constitutes the first region. Exemplarily, the coating comprises at least one dielectric layer, with at least one conductor layer thereon. The recess extends through the conductor layer, and exemplarily is formed by FIB (focussed ion beam) etching. A variety of other embodiments are also disclosed, as are other applications of lasers according to the invention.

摘要翻译： 根据本发明的近场光学装置包含新型半导体激光光子源。 该源能够提供比现有技术的近场源高得多的光子通量，潜在地促进示例性近场数据存储和检索装置中的兆赫兹范围内的读出速率。 新颖的源包括不均匀的激光发射面，发射面被配置为使得总辐射发射的至少50％来自宽度小于λs / 2的发射面的小（第一）区域， 其中λs是激光的发射波长。 在示例性实施例中，在发射面上提供多层涂层，使得来自面部的辐射相对较低。 在涂层中形成凹部，使得发生来自凹部的实质辐射发射。 凹槽构成第一区域。 示例性地，涂层包括至少一个电介质层，其上具有至少一个导体层。 凹部延伸穿过导体层，并且示例性地由FIB（聚焦离子束）蚀刻形成。 还公开了各种其它实施例，以及根据本发明的激光器的其它应用。