公开(公告)号：US20190234850A1

公开(公告)日：2019-08-01

申请号：US16258295

申请日：2019-01-25

Applicant: Massachusetts Institute of Technology

Inventor： Robin Singh ,  Anuradha M. Agarwal ,  Danhao Ma ,  Peter X. Su ,  Brian W. Anthony

IPC: G01N15/02 ,  G02B6/12

CPC classification number: G01N15/0205 ,  G01N15/06 ,  G01N21/39 ,  G01N21/45 ,  G01N21/552 ,  G01N21/7703 ,  G01N21/7746 ,  G01N33/543 ,  G01N33/54373 ,  G01N2015/0046 ,  G01N2015/03 ,  G01N2015/0693 ,  G02B6/12004 ,  G02B6/12007 ,  G02B6/29338 ,  G02B6/2938

Abstract: A photonic aerosol particle sensor includes a plurality of photonic waveguide resonators each having a photonic waveguide disposed along a separate waveguide resonator path and each photonic waveguide having a lateral waveguide width different than the waveguide width of other photonic waveguide resonators in the plurality. All waveguides in the plurality of photonic waveguide resonators have a common vertical thickness and are formed of a common photonic waveguide material. An optical input connection couples light into the waveguide resonators. A particle input conveys aerosol particles toward the waveguide resonators and an aerosol particle output conveys aerosol particles away from the waveguide resonators. At least one optical output connection is optically connected to accept light out of the plurality of photonic waveguide resonators to provide a signal indicative of at least one characteristic of the aerosol particles to be analyzed.

公开(公告)号：US11181454B2

公开(公告)日：2021-11-23

申请号：US16258295

申请日：2019-01-25

Applicant: Massachusetts Institute of Technology

Inventor： Robin Singh ,  Anuradha M. Agarwal ,  Danhao Ma ,  Peter X. Su ,  Brian W. Anthony

IPC: G01N15/02 ,  G01N21/552 ,  G01N33/543 ,  G01N21/39 ,  G01N15/06 ,  G01N21/77 ,  G01N21/45 ,  G02B6/12 ,  G01N15/00 ,  G02B6/293

Abstract: A photonic aerosol particle sensor includes a plurality of photonic waveguide resonators each having a photonic waveguide disposed along a separate waveguide resonator path and each photonic waveguide having a lateral waveguide width different than the waveguide width of other photonic waveguide resonators in the plurality. All waveguides in the plurality of photonic waveguide resonators have a common vertical thickness and are formed of a common photonic waveguide material. An optical input connection couples light into the waveguide resonators. A particle input conveys aerosol particles toward the waveguide resonators and an aerosol particle output conveys aerosol particles away from the waveguide resonators. At least one optical output connection is optically connected to accept light out of the plurality of photonic waveguide resonators to provide a signal indicative of at least one characteristic of the aerosol particles to be analyzed.

公开(公告)号：US20190331529A1

公开(公告)日：2019-10-31

申请号：US16506142

申请日：2019-07-09

Applicant: Massachusetts Institute of Technology

Inventor： Juejun Hu ,  Tian Gu ,  Hongtao Lin ,  Derek Kita ,  Anuradha M. Agarwal

IPC: G01J3/453 ,  G02F1/313 ,  G01J3/02

Abstract: A spectrometer includes an interferometer having a first interference arm and a second interference arm to produce interference patterns from incident light. At least one of the interference arms includes a series of cascaded optical switches connected by two (or more) waveguides of different lengths. Each optical switch directs the incident light into one waveguide or another, thereby changing the optical path length difference between the first interference arm and the second interference arm. This approach can be extended to multi-mode incident light by placing parallel interferometers together, each of which performs spectroscopy of one single mode in the multi-mode incident light. To maintain the compactness of the spectrometer, adjacent interferometers can share one interference arm.

公开(公告)号：US09110221B2

公开(公告)日：2015-08-18

申请号：US13763090

申请日：2013-02-08

Applicant: Massachusetts Institute of Technology

Inventor： Anuradha M. Agarwal ,  Antonio Canciamilla ,  Francesco Morichetti ,  Stefano Grillanda ,  Lionel C. Kimerling ,  Andrea Melloni ,  Jurgen Michel ,  Vivek Raghunathan ,  Vivek Singh

IPC: G02B6/10 ,  G02B6/26 ,  G02B6/00 ,  G02B6/036 ,  G02B6/122 ,  G02B6/02

CPC classification number: G02B6/03694 ,  G02B6/02033 ,  G02B6/122

Abstract: In a photonic waveguide, there is provided an undercladding layer and a waveguide core, having a cross-sectional height and width, that is disposed on the undercladding layer. The waveguide core comprises a waveguide core material having a thermo-optic coefficient. A refractive index tuning cladding layer is disposed on top of the waveguide core. The refractive index tuning cladding layer comprises a refractive index tuning cladding material having an adjustable refractive index and an absorption length at a refractive index tuning radiation wavelength. A thermo-optic coefficient compensation cladding layer is disposed on top of the refractive index tuning cladding layer. The thermo-optic coefficient compensation cladding layer comprises a thermo-optic coefficient compensation material having a thermo-optic coefficient that is of opposite sign to the thermo-optic coefficient of the waveguide core material. The thermo-optic coefficient compensation cladding layer provides at least partial compensation for the waveguide core thermo-optic coefficient.

Abstract translation: 在光子波导中，提供了具有横截面高度和宽度的下封层和波导芯，其设置在下封层上。 波导芯包括具有热光系数的波导芯材料。 折射率调谐包层设置在波导芯的顶部。 折射率调谐包层包括在折射率调谐辐射波长处具有可调折射率和吸收长度的折射率调谐包层材料。 热电系数补偿包层设置在折射率调谐包层的顶部。 热光系数补偿包层包括具有与波导芯材料的热光系数相反的热光系数的热光系数补偿材料。 热光系数补偿包层对波导芯热光系数提供至少部分补偿。

公开(公告)号：US20140090686A1

公开(公告)日：2014-04-03

申请号：US13651140

申请日：2012-10-12

Applicant: The Massachusetts Institute of Technology

Inventor： Anuradha M. Agarwal ,  Brian R. Albert ,  Lirong Zeng Broderick ,  Jing Cheng ,  Juejun Hu ,  Lionel Kimerling ,  Jifeng Liu ,  Jurgen Michel ,  Xing Sheng

IPC: H01L31/052

CPC classification number: H01L31/0475 ,  H01L31/0549 ,  H01L31/068 ,  H01L31/0693 ,  H01L31/0735 ,  H01L31/0749 ,  H01L31/078 ,  H01L31/1836 ,  H01L31/1852 ,  Y02E10/52 ,  Y02E10/541 ,  Y02E10/544 ,  Y02E10/547

Abstract: Provided in one embodiment is an article, comprising: a substrate comprising silicon; and a plurality of solar cells disposed over the substrate, wherein at least one of the plurality of the solar cells comprises one of: (i) a first semiconductor layer disposed over the substrate, the first layer comprising at least one semiconductor material; and (ii) a first Ge-containing layer disposed over the substrate, the first layer comprising a Ge-containing material, and a second layer disposed over the first layer, the second layer comprising at least one semiconductor material. At least some of the solar cells may comprise semiconductor materials of different bandgap values.

Abstract translation: 在一个实施方案中提供了一种制品，其包括：包含硅的基材; 以及设置在所述基板上的多个太阳能电池，其中所述多个太阳能电池中的至少一个包括以下之一：（i）设置在所述基板上的第一半导体层，所述第一层包括至少一种半导体材料; 和（ii）设置在所述衬底上的第一含Ge层，所述第一层包括含Ge材料，以及设置在所述第一层上的第二层，所述第二层包含至少一种半导体材料。 至少一些太阳能电池可以包括不同带隙值的半导体材料。