公开(公告)号：US20200333683A1

公开(公告)日：2020-10-22

申请号：US16842048

申请日：2020-04-07

申请人： Massachusetts Institute of Technology

发明人： Scott A. SKIRLO ,  Cheryl Marie SORACE-AGASKAR ,  Marin SOLJACIC ,  Simon VERGHESE ,  Jeffrey S. HERD ,  Paul William JUODAWLKIS ,  Yi YANG ,  DIRK ENGLUND ,  Mihika PRABHU

IPC分类号： G02F1/313 ,  G02F1/295 ,  G01S7/481

摘要： An integrated optical beam steering device includes a planar dielectric lens that collimates beams from different inputs in different directions within the lens plane. It also includes an output coupler, such as a grating or photonic crystal, that guides the collimated beams in different directions out of the lens plane. A switch matrix controls which input port is illuminated and hence the in-plane propagation direction of the collimated beam. And a tunable light source changes the wavelength to control the angle at which the collimated beam leaves the plane of the substrate. The device is very efficient, in part because the input port (and thus in-plane propagation direction) can be changed by actuating only log2 N of the N switches in the switch matrix. It can also be much simpler, smaller, and cheaper because it needs fewer control lines than a conventional optical phased array with the same resolution.

公开(公告)号：US20190265574A1

公开(公告)日：2019-08-29

申请号：US16284161

申请日：2019-02-25

申请人： Massachusetts Institute of Technology

发明人： Scott A. SKIRLO ,  Cheryl Marie SORACE-AGASKAR ,  Marin SOLJACIC ,  Simon VERGHESE ,  Jeffrey S. HERD ,  Paul William JUODAWLKIS ,  Yi YANG ,  Dirk Robert ENGLUND ,  Mihika PRABHU

IPC分类号： G02F1/313 ,  G02F1/295

摘要： An integrated optical beam steering device includes a planar dielectric lens that collimates beams from different inputs in different directions within the lens plane. It also includes an output coupler, such as a grating or photonic crystal, that guides the collimated beams in different directions out of the lens plane. A switch matrix controls which input port is illuminated and hence the in-plane propagation direction of the collimated beam. And a tunable light source changes the wavelength to control the angle at which the collimated beam leaves the plane of the substrate. The device is very efficient, in part because the input port (and thus in-plane propagation direction) can be changed by actuating only log2 N of the N switches in the switch matrix. It can also be much simpler, smaller, and cheaper because it needs fewer control lines than a conventional optical phased array with the same resolution.

公开(公告)号：US20180287329A1

公开(公告)日：2018-10-04

申请号：US15944360

申请日：2018-04-03

申请人： Massachusetts Institute of Technology

发明人： Yi YANG ,  Aviram MASSUDA ,  Charles ROQUES-CARMES ,  Nicholas H. RIVERA ,  Tena DUBCEK ,  John D. JOANNOPOULOS ,  Karl Kimon BERGGREN ,  Ido E. KAMINER ,  Marin SOLJACIC ,  Yujia YANG ,  Steven E. KOOI ,  Phillip Donald Keathley

IPC分类号： H01S3/09 ,  H01S3/101

摘要： An apparatus for generating Smith-Purcell radiation having at least one spectral component at a wavelength A includes a periodic structure including a dielectric material and an electron source, in electromagnetic communication with the periodic structure, to emit an electron beam propagating within about 5λ from a surface of the periodic structure to induce emission of the Smith-Purcell radiation. The electron beam has an electron energy tunable between about 0.5 keV and about 40 keV so as to change a wavelength of the Smith-Purcell radiation.