公开(公告)号：WO2022104113A1

公开(公告)日：2022-05-19

申请号：PCT/US2021/059208

申请日：2021-11-12

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： PURVIS, Lafe Joseph, II ,  LANE, Austin ,  COLBURN, Matthew E.

IPC: C07C271/16 ,  C07C271/28 ,  C07C271/48 ,  C07C323/12 ,  C07C323/20 ,  C07C323/43 ,  C07C333/04 ,  C07D317/64 ,  G03F7/00 ,  G03H1/02

Abstract: The disclosure provides recording materials including mono- or poly-phenyl-core derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several structures are disclosed for mono- or poly-phenyl-core derivatized monomers and polymers for use in Bragg gratings applications, leading to materials with higher refractive index, low birefringence, and high transparency. The disclosed mono- or poly-phenyl-core derivatized monomers and polymers thereof can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer.

公开(公告)号：WO2020163334A1

公开(公告)日：2020-08-13

申请号：PCT/US2020/016584

申请日：2020-02-04

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： PERLMUTTER, Zachary ,  VORA, Ankit ,  LANE, Austin ,  CALAFIORE, Giuseppe ,  COLBURN, Matthew, E. ,  RAO, Tingling

IPC: G03F7/00

Abstract: Disclosed herein is a nanoimprint lithography (NIL) precursor material comprising a base resin component having a first refractive index ranging from 1.45 to 1.80, and a nanoparticles component having a second refractive index greater than the first refractive index of the base resin component. According to certain embodiments, further disclosed herein are a cured NIL material made by curing the NIL precursor material, a NIL grating comprising the cured NIL material, an optical component comprising the NIL grating, and methods for forming the NIL grating and the optical component using a NIL process.

公开(公告)号：WO2020106660A3

公开(公告)日：2020-05-28

申请号：PCT/US2019/062098

申请日：2019-11-19

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： MENGUC, Yigit ,  OUDERKIRK, Andrew John ,  LIAO, Christopher Yuan Ting ,  SMYTH, Katherine Marie ,  WALLIN, Thomas ,  LINDSAY, Jack ,  LANE, Austin ,  MALHOTRA, Tanya ,  DEIST, Ken

IPC: G06F3/01 ,  H04L12/24

Abstract: In some embodiments, an electroactive device includes a first electrode, a second electrode, and an electroactive element disposed between the first electrode and the second electrode. The electroactive element may include a plurality of voids distributed within the electroactive element. The electroactive device may have a non-uniform electroactive response based at least in part on a non-uniform distribution of voids within the electroactive element. The non-uniform electroactive response may include a non-uniform sensor response or a non-uniform actuation response. Various other methods, systems, apparatuses, and materials are also disclosed.

公开(公告)号：WO2022081880A1

公开(公告)日：2022-04-21

申请号：PCT/US2021/055034

申请日：2021-10-14

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： MCNEIL, Janee Ashley ,  ALIM, Marvin Dion ,  LANE, Austin ,  YANG, Yang ,  JORABCHI, Kavous

IPC: G02B5/18 ,  G02B27/01 ,  G03H1/02 ,  G03H1/18

Abstract: A grating coupler may be fabricated by exposing a photopolymer layer to grating forming light for forming periodic refractive index variations in the photopolymer layer. The photopolymer layer may be exposed to apodization light for reducing an amplitude of the periodic refractive index variations in a spatially-selective manner. The apodization may also be achieved or facilitated by subjecting outer surface(s) of the photopolymer layer to a chemically reactive agent that causes the refractive index contrast to be reduced near the surface(s) of application. The apodized refractive index profile of the gratings facilitates the reduction of optical crosstalk between different gratings of the grating coupler.

公开(公告)号：WO2021108282A1

公开(公告)日：2021-06-03

申请号：PCT/US2020/061714

申请日：2020-11-23

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： PURVIS, Lafe ,  LANE, Austin ,  COLBURN, Matthew E.

IPC: C07C271/16 ,  C07C271/28 ,  C07C271/34 ,  C07C323/19 ,  C07C323/21 ,  C07C329/06 ,  C07D303/30 ,  C07D333/46 ,  C07D405/14 ,  G03H1/02

Abstract: The disclosure provides recording materials including aromatic substituted methane-core derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several structures are disclosed for monomers and polymers for use in Bragg gratings applications leading to materials with higher refractive index, low birefringence, and high transparency. The disclosed derivatized monomers and polymers thereof can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer.

公开(公告)号：WO2021108204A1

公开(公告)日：2021-06-03

申请号：PCT/US2020/061218

申请日：2020-11-19

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： PURVIS, Lafe ,  LANE, Austin ,  COLBURN, Matthew E.

IPC: C07C235/34 ,  C07C271/48 ,  C07D409/12 ,  G03H1/02

Abstract: The disclosure provides recording materials including aromatic substituted ethane-core derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several structures are disclosed for monomers and polymers for use in Bragg gratings applications, leading to materials with higher refractive index, low birefringence, and high transparency. The disclosed derivatized monomers and polymers thereof can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer.

公开(公告)号：WO2020176528A1

公开(公告)日：2020-09-03

申请号：PCT/US2020/019727

申请日：2020-02-25

Applicant: FACEBOOK TECHNOLOGIES, LLC.

Inventor： VORA, Ankit ,  MOHANTY, Nihar Ranjan ,  LANE, Austin ,  COLBURN, Matthew E. ,  FRANKE, Elliott

IPC: G02B5/18 ,  G03F7/004 ,  H01J37/305

Abstract: Disclosed herein are techniques for fabricating straight or slanted variable-etch-depth gratings. A photoresist material for fabricating a variable-etch-depth grating in a substrate is sensitive to light with a wavelength shorter than 300 nm and has an etch rate comparable to the etch rate of the substrate. A depth of an exposed portion of a photoresist material layer including the photoresist material correlates with the exposure dose. After exposure using a gray-scale mask and development, the photoresist material layer has a non-uniform thickness. The photoresist material layer with the non-uniform thickness and the underlying substrate are etched using a straight etching or slanted etching process to form the straight or slanted variable-etch-depth grating in the substrate. The variable-etch-depth grating is characterized by a non-uniform depth profile corresponding to the non-uniform thickness of the photoresist material layer before etching.

公开(公告)号：WO2020123128A1

公开(公告)日：2020-06-18

申请号：PCT/US2019/062925

申请日：2019-11-25

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： MALHOTRA, Tanya ,  WALLIN, Thomas, John Farrell ,  MENGUC, Yigit ,  OUDERKIRK, Andrew, John ,  SMYTH, Katherine, Marie ,  LINDSAY, Jack ,  DIEST, Kenneth ,  LANE, Austin ,  LIAO, Christopher, Yuan Ting

IPC: G06F3/01 ,  B81B7/00 ,  G02B26/08 ,  H01L41/02 ,  H01L41/083

Abstract: In some embodiments, a device, such as a transducer, includes a polymer element disposed between electrodes, and a control circuit configured to apply electrical potentials having the same polarity to the electrodes. A separation distance between the electrodes may be increased by an electrostatic repulsion between the electrodes. Various other devices, systems, methods, and computer-readable media are also disclosed.

公开(公告)号：WO2020028894A1

公开(公告)日：2020-02-06

申请号：PCT/US2019/045078

申请日：2019-08-05

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： LEIBOVICI, Matthieu, Charles, Raoul ,  JORABCHI, Kavous ,  LANE, Austin

IPC: G02B5/18 ,  G02B27/44 ,  G02B6/02

Abstract: A monitoring system monitors changes in an index of refraction of the grating over a time interval that includes the period of time. The monitoring system includes a light source assembly, a probing assembly, a power meter (e.g., a diffraction and/or a transmittance power meter), and a controller. The light source assembly emits a probe beam. The scanning assembly scans the probe beam over an area of the grating. The power meter measures power of a portion of the probe beam that interacts (e.g., is transmitted by or diffracted from) with the area of the grating. The controller determines changes in grating parameters (may be as a function of time) for the grating being formed based in part on measured power readings over the time interval.