公开(公告)号：US11867937B2

公开(公告)日：2024-01-09

申请号：US17500913

申请日：2021-10-13

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Noah A. Rubin ,  Federico Capasso

IPC: G01J4/04 ,  G02B5/30

CPC classification number: G02B5/3025 ,  G01J4/04

Abstract: The present disclosure provides an optical component, which may be a metasurface grating, including (a) a substrate; and (b) an array of subwavelength-spaced phase-shifting elements, which are tessellated on the substrate to produce, when illuminated with a polarized incident light, a diffracted light beam with a distinct polarization state for each of a finite number of diffraction orders, wherein the finite number is 2 or more.

公开(公告)号：US11835680B2

公开(公告)日：2023-12-05

申请号：US16610896

申请日：2018-05-04

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Benedikt Groever ,  Wei-Ting Chen ,  Federico Capasso

IPC: G02B1/00 ,  G02B5/18 ,  B82Y20/00

CPC classification number: G02B1/002 ,  G02B5/1809 ,  B82Y20/00

Abstract: An optical device comprises a first meta-lens and a second meta-lens. The first meta-lens includes a first plurality of nanostructures that define a first phase profile of the first meta-lens. The second meta-lens includes a second plurality of nanostructures that define a second phase profile of the second meta-lens. A combination of the first meta-lens having the first phase profile and the second meta-lens having the second phase profile is configured to achieve a diffraction-limited focusing and correct an aberration of light transmitted through the optical device.

公开(公告)号：US11774635B2

公开(公告)日：2023-10-03

申请号：US17184326

申请日：2021-02-24

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Zhaoyi Li ,  Yao-Wei Huang ,  Federico Capasso

IPC: G02B1/00

CPC classification number: G02B1/002 ,  G02B2207/101

Abstract: An optical device includes a first zone including a first plurality of nanoscale elements. The first plurality of nanoscale elements has a first optical dispersion profile and a first orientation. The optical device has a second zone including a second plurality of nanoscale elements. The second plurality of nanoscale elements has a second optical dispersion profile and a second orientation. The first orientation and the second orientation are configured according to constructive interference for a plurality of wavelengths and a focal length.

公开(公告)号：US20220404525A1

公开(公告)日：2022-12-22

申请号：US17777211

申请日：2020-12-01

Applicant: 3M INNOVATIVE PROPERTIES COMPANY ,  PRESIDENT AND FELLOWS OF HARVARD COLLEGE, A CHARITABLE CORPORATION OF MASSACHUSETTS

Inventor： Martin B. Wolk ,  Robert L. Brott ,  Karl K. Stensvad ,  James M. Nelson ,  Federico Capasso ,  Xinghui Yin ,  Joon-Suh Park

IPC: G02B1/00 ,  G02B26/06

Abstract: An optical metasurface film includes a flexible polymeric film having a first major surface, a patterned polymer layer having a first surface proximate to the first major surface of the flexible polymeric film and having a second nanostructured surface opposite the first surface, and a refractive index contrast layer adjacent to the nanostructured surface of the patterned polymer layer forming a nanostructured bilayer with a nanostructured interface. The nanostructured bilayer acts locally on amplitude, phase, or polarization of light, or a combination thereof and imparts a light phase shift that varies as a function of position of the nano structured bilayer on the flexible polymeric film. The light phase shift of the nanostructured bilayer defines a predetermined operative phase profile of the optical metasurface film.

公开(公告)号：US11366296B2

公开(公告)日：2022-06-21

申请号：US15778208

申请日：2016-11-23

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Robert C. Devlin ,  Mohammadreza Khorasaninejad ,  Federico Capasso ,  Hongkun Park ,  Alexander Arthur High

IPC: G02B1/02 ,  G02B13/14 ,  G02B1/00 ,  H01L31/02 ,  G03F7/00 ,  G03F7/40 ,  C23C16/56 ,  C23C16/455 ,  C23C16/04

Abstract: A method of fabricating a visible spectrum optical component includes: providing a substrate; forming a resist layer over a surface of the substrate; patterning the resist layer to form a patterned resist layer defining openings exposing portions of the surface of the substrate; performing deposition to form a dielectric film over the patterned resist layer and over the exposed portions of the surface of the substrate, wherein a top surface of the dielectric film is above a top surface of the patterned resist layer; removing a top portion of the dielectric film to expose the top surface of the patterned resist layer and top surfaces of dielectric units within the openings of the patterned resist layer; and removing the patterned resist layer to retain the dielectric units over the substrate.

公开(公告)号：US11320641B2

公开(公告)日：2022-05-03

申请号：US16499838

申请日：2018-03-29

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Wei-Ting Chen ,  Alexander Yutong Zhu ,  Mohammadreza Khorasaninejad ,  Zhujun Shi ,  Federico Capasso ,  Vyshakh Sanjeev

IPC: G02B21/00 ,  G02B21/33 ,  G02B21/26 ,  G02B1/00

Abstract: The optical imaging apparatus includes a metasurface lens including a substrate and a plurality of nano-structures patterned on a first side of the substrate. The optical imaging apparatus further includes imaging optics disposed in a spaced apart relationship with a second side of the substrate. The second side is opposite the first side on which the nano-structures are patterned. A surface of the imaging optics and the second side of the substrate define a space for accommodating an immersion fluid. The metasurface lens is configured to direct light incident on the plurality of nano-structures towards the imaging optics through the space accommodating the immersion fluid.

公开(公告)号：US11194082B2

公开(公告)日：2021-12-07

申请号：US16471549

申请日：2017-12-19

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Alexander Yutong Zhu ,  Wei-Ting Chen ,  Mohammadreza Khorasaninejad ,  Jaewon Oh ,  Muhammad Aun Abbas Zaidi ,  Robert C. Devlin ,  Federico Capasso

IPC: G02B5/18 ,  G01J3/02 ,  G01J3/28 ,  G02B3/00

Abstract: An optical device includes: (1) a substrate; and (2) multiple meta-lenses disposed on the substrate, each meta-lens of the meta-lenses including multiple nanofins disposed on a respective region of the substrate, the nanofins together specifying a phase profile of the meta-lens.

公开(公告)号：US11119255B2

公开(公告)日：2021-09-14

申请号：US16040363

申请日：2018-07-19

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Alan Jenting She ,  Shuyan Zhang ,  Federico Capasso

IPC: G02B5/02 ,  G06F30/17 ,  G02B1/00 ,  G02B27/00 ,  G06F119/18

Abstract: A method of generating a layout data file for a metasurface device is disclosed. At a radial position of a metasurface device, the method determines a primitive cell of a first level having a metasurface feature pattern that is repeated around an arc corresponding to a circumference at the radial position. The method generates metasurface structures of higher levels. Each metasurface structure of a higher level includes multiple references to a structure or a primitive cell of a next lower level. The method stores at least a portion of a layout of the metasurface device to a layout data file. The layout includes references to metasurface structures of two or more of the higher levels.

公开(公告)号：US20180216797A1

公开(公告)日：2018-08-02

申请号：US15885622

申请日：2018-01-31

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Mohammadreza Khorasaninejad ,  Zhujun Shi ,  Alexander Y. Zhu ,  Wei Ting Chen ,  Vyshakh Sanjeev ,  Federico Capasso

IPC: F21V5/00 ,  F21K9/64 ,  F21V5/04 ,  F21V5/10 ,  G02B5/18 ,  B82Y40/00

CPC classification number: F21V5/004 ,  B82Y20/00 ,  B82Y40/00 ,  F21K9/64 ,  F21V5/045 ,  F21V5/046 ,  F21V5/10 ,  G02B5/1809 ,  G02B5/1876 ,  H04N13/25

Abstract: An optical device includes a substrate, a reflective layer disposed over the substrate, and a metalens disposed over the reflective layer. The metalens includes a plurality of nanopillars, the plurality of nanopillars together specifying a phase profile such that the metalens has a focal length that is substantially constant over a wavelength range of an incident light of about 490 nm to about 550 nm.

公开(公告)号：US20240427163A1

公开(公告)日：2024-12-26

申请号：US18668334

申请日：2024-05-20

Applicant: President and Fellows of Harvard College

Inventor： Francesco Aieta ,  Mikhail Kats ,  Patrice Genevet ,  Federico Capasso ,  Mohammadreza Khorasaninejad

IPC: G02B27/42 ,  G02B1/00 ,  G02B5/00 ,  G02B5/18 ,  G02B5/20 ,  H01Q15/10

Abstract: Metasurface optical components deposited on the surface of a substrate are used to alter incident light. The metasurface optical components comprise a pattern of silicon dielectric resonators that have nonperiodic gap distances between adjacent silicon dielectric resonators; and each silicon dielectric resonator is an elongated rectangular prism that has a width, a length, and a thickness. Incident light is directed to the metasurface optical components, wherein the gap distances, the widths, and the thicknesses are configured to scatter the incident light and impart a phase shift, ranging at least from 0 to 2π, on an outgoing light. Each dielectric resonator has a rectangular cross-section in a plane perpendicular to the substrate surface such that a first phase shift is imparted for a transverse-electric (TE) component of the incident light and a second phase shift is imparted for a transverse-magnetic (TM) component of the incident light.