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1.发明公开公开(公告)号：US20230400652A1
公开(公告)日：2023-12-14
申请号：US18317597
申请日：2023-05-15
发明人： Christopher Heidelberger , Cheryl Marie SORACE-AGASKAR , Jason PLANT , Boris KHARAS , Reuel B. SWINT , Yifei Li , Paul William JUODAWLKIS
CPC分类号： G02B6/43 , G02B6/4283 , G02B6/4295
摘要： A III-V/SiNx hybrid integrated photonics platform is described. A wafer can include regions where SiNx waveguides are formed and regions where III-V waveguides have been grown heteroepitaxially from the Si substrate and formed lithographically to butt couple to the SiNx waveguides. Efficient optical coupling is possible between the SiNx and III-V waveguides (−2.5 dB loss/transition). A threading dislocation density (TDD) as low as 4×106 cm−2 can be obtained in the III-V waveguides. The TDD enables fully parallel fabrication of integrated III-V optoelectronic devices, allowing for complex photonic integrated circuits with many active components.
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公开(公告)号：US20220057573A1
公开(公告)日：2022-02-24
申请号：US17496817
申请日：2021-10-08
发明人： Josue Lopez , Samuel Kim , Jamison Sloan , Boris KHARAS , Jeffrey Scott HERD , Marin SOLJACIC , Cheryl Marie SORACE-AGASKAR , Suraj Deepak BRAMHAVAR , Steven Glenn JOHNSON , George BARBASTATHIS
摘要： An integrated optical beam steering device includes a planar Luneburg lens that collimates beams from different inputs in different directions within the lens plane. It also includes a curved (e.g., semi-circular or arced) grating coupler that diffracts the collimated beams out of the lens plane. The beams can be steered in the plane by controlling the direction along which the lens is illuminated and out of the plane by varying the beam wavelength. Unlike other beam steering devices, this device can operate over an extremely wide field of view—up to 180°—without any aberrations off boresight. In other words, the beam quality is uniform in all directions, unlike with aplanatic lenses, thanks to the circular symmetry of the planar Luneburg lens, which may be composed of subwavelength features. The lens is also robust to misalignment and fabrication imperfections and can be made using standard CMOS processes.
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公开(公告)号：US20190265574A1
公开(公告)日：2019-08-29
申请号：US16284161
申请日：2019-02-25
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
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.
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公开(公告)号：US20200333683A1
公开(公告)日：2020-10-22
申请号：US16842048
申请日：2020-04-07
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
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.
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