公开(公告)号：US20060186432A1

公开(公告)日：2006-08-24

申请号：US11061060

申请日：2005-02-18

申请人： Viatcheslav Osipov ,  Alexandre Bratkovski

发明人： Viatcheslav Osipov ,  Alexandre Bratkovski

IPC分类号： H01L33/00

CPC分类号： H01L33/02 ,  H01L33/0004 ,  H01S5/04 ,  H01S5/32

摘要： Spin-polarized electrons can be efficiently extracted from an n-doped semiconductor layer (n-S) by forming a modified Schottky contact with a ferromagnetic material (FM) and a δ-doped layer at an interface under forward bias voltage conditions. Due to spin-selection property of the FM-S junction, spin-polarized carriers appear in the n-doped semiconductor layer near the FM-S interface. If a FM-n-n′-p heterostructure is formed, where the n′ region is a narrower gap semiconductor, polarized electrons from the n-S region and holes from the p-S region can diffuse into the n′-S region under the influence of independent voltages applied between the FM and n′ regions and the n′ and p regions. The polarized electrons and holes recombine in the n′-S region and produce polarized light. The polarization can be controlled and modulated by controlling the applied voltages.

摘要翻译： 通过在正向偏压条件下在界面处形成与铁磁材料（FM）和δ掺杂层的改性肖特基接触，可以从n掺杂半导体层（n-S）有效地提取自旋极化电子。 由于FM-S结的自旋选择性质，自旋极化载流子出现在FM-S界面附近的n掺杂半导体层中。 如果形成FM-n-n'-p异质结构，其中n'区域是较窄的间隙半导体，则来自nS区域的极化电子和来自pS区域的空穴可以扩散到n'-S区域的影响下 在FM和n'区域以及n'和p区域之间施加独立电压。 极化的电子和空穴在n'-S区域复合并产生偏振光。 可以通过控制施加的电压来控制和调制极化。

公开(公告)号：US07043104B1

公开(公告)日：2006-05-09

申请号：US11152857

申请日：2005-06-14

申请人： Alexandre Bratkovski ,  Shih-Yuan Wang

发明人： Alexandre Bratkovski ,  Shih-Yuan Wang

IPC分类号： G02B6/00 ,  G02B6/26

CPC分类号： G01Q60/22 ,  H01S3/06745 ,  H01S3/06754 ,  Y10S385/902

摘要： A near-field scanning optical probe comprises an optical fiber for conducting imaging light therethrough, the fiber having at least a portion doped with an optical gain medium and further having a tapered end portion with a frustoconical wall and an end surface for emitting the imaging light. In use, pumping light and optionally imaging light are coupled into the optical fiber such that the pumping light excites the optical gain medium to a higher energy state to emit photons at the approximate wavelength of the imaging light desired, to thereby produce and optionally amplify the imaging light emitted by the probe.

摘要翻译： 近场扫描光学探针包括用于传导成像光的光纤，该光纤具有至少一部分掺杂有光学增益介质的部分，并且还具有锥形端部，其具有截头圆锥形壁和用于发射成像光的端面 。 在使用中，泵浦光和可选的成像光被耦合到光纤中，使得泵浦光激发光学增益介质到更高的能量状态以在所需成像光的近似波长处发射光子，从而产生和任选地放大 由探头发射的成像光。