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Tian Min Gu

from Kirkland, WA
Age ~73
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Also known as:
Tian M Gu, Min Gu Tian, Tian Min Wang, Tian Min Gu Wang, Tian Min Gutian, Tianmin Gu, Tian Mingu
Phone and address:
12423 NE 80Th St, Kirkland, WA 98033
Related to:
Xinxin Wang
Connected to:
Alexander Gu, 34An Gu, 30Chaoning Gu, 62Crystal Gu, 33Fred Y Gu, 58Grace Y Gu, 64Hanna Gu, 44Helena Y Gu, 32Hong C Gu, 58Howard H Gu, 66

Tian Gu Phones & Addresses

    s
  • 12423 NE 80Th St, Kirkland, WA 98033
  • Somerville, MA
  • Southampton, PA
  • Cambridge, MA
  • 129 Walnut St, Livingston, NJ 07039
  • Elizabeth, NJ
  • Bronx, NY

Work

Position: Professional/Technical

Education

Degree: Associate degree or higher

Publications

Us Patents

Methods And Systems For Metasurface-Based Nanofabrication

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US Patent:
20220357484, Nov 10, 2022
Filed:
Mar 10, 2022
Appl. No.:
17/691851
Inventors:
Juejun Hu - Newton MA, US
Tian GU - Fairfax VA, US
Fan YANG - Cambridge MA, US
Luigi Ranno - Cambridge MA, US
International Classification:
G02B 1/00
G02B 27/00
Abstract:
The present technology is related to optics, optical systems, and optically induced micro-/nano-fabrication methods. It includes metasurface optics, direct laser writing, and microscopy. Flat optic devices, architectures, and methods can achieve superb optical performance and structural simplicity compared to traditional bulk optical systems.

Optical Devices With Phase-Change Materials

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US Patent:
20210333575, Oct 28, 2021
Filed:
Feb 23, 2021
Appl. No.:
17/183267
Inventors:
Juejun Hu - Newton MA, US
Tian GU - Fairfax VA, US
Yifei ZHANG - Cambridge MA, US
Carlos Andres Rios Ocampo - Somerville MA, US
Mikhail Shalaginov - Somerville MA, US
Xiaoming Qiu - Somerville MA, US
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
G02F 1/01
Abstract:
Reversible phase-change materials (PCMs) can be added to or incorporated into meta-lenses, wave plates, waveguides, gratings, and other optical components to form active optical devices with controllable and adjustable optical characteristics. Local heating can be used to induce solid-state phase changes and large refractive index changes in the PCMs. The phase and index changes can provide large changes in the device's optical characteristics. Optical devices with PCM can be used for imaging applications, orbital angular momentum control, photonic integrated circuits and optical communication systems, beam steering, and other application.

Chip-Scale Optical Coherence Tomography Engine

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US Patent:
20210307603, Oct 7, 2021
Filed:
Feb 2, 2021
Appl. No.:
17/165001
Inventors:
Juejun Hu - Newton MA, US
Tian GU - Fairfax VA, US
Derek Kita - Cambridge MA, US
Carlos Andres Rios Ocampo - Somerville MA, US
International Classification:
A61B 3/10
G01B 9/02
G02B 27/10
Abstract:
An optical coherence tomography (OCT) engine includes a digital Fourier-Transform (dFT) spectrometer, a tunable delay line, and a high-speed optical phased array (OPA) scanner integrated onto a single chip. The broadband dFT spectrometer offers superior signal-to-noise ratio (SNR) and fine axial resolution; the tunable delay line ensures large imaging depth by circumventing sensitivity roll-off; and the OPA can scan the beams at GHz rates without moving parts. Unlike conventional spectrometers, the dFT spectrometer employs an optical switch network to retrieve spectral information in an exponentially scaling fashion—its performance doubles with every new optical switch added to the network. Moreover, it also benefits from the Fellgett's advantage, which provide a significant SNR edge over conventional spectrometers. The tunable delay line balances the path length difference between the reference and sample arms, avoiding any need to sample high-frequency spectral fringes.

Meta-Optics-Based Systems And Methods For Ocular Applications

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US Patent:
20210307608, Oct 7, 2021
Filed:
Feb 1, 2021
Appl. No.:
17/164425
Inventors:
Juejun Hu - Newton MA, US
Tian GU - Fairfax VA, US
Mikhail Shalaginov - Somerville MA, US
Fan YANG - Cambridge MA, US
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
A61B 3/14
G02B 27/01
G02B 1/00
G02B 27/00
A61B 3/12
G06F 3/01
Abstract:
Meta-lens based ocular imaging, near-eye display, and eye-tracking systems are described. The systems can include a single focusing optic and an integrated circuit that provides illumination light and includes an imaging array. The focusing optic includes meta-atoms formed on a substrate. The systems may have no moving parts and achieve imaging or image-projection fields-of-view approaching or exceeding 180 degrees. Because of their low part count, the systems can be robust and have a very small form factor.

Ultra-Wide Field-Of-View Flat Optics

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US Patent:
20210044748, Feb 11, 2021
Filed:
Jun 8, 2020
Appl. No.:
16/894945
Inventors:
Juejun Hu - Newton MA, US
Tian GU - Fairfax VA, US
Mikhail Shalaginov - Somerville MA, US
International Classification:
H04N 5/232
G02B 1/00
G02B 13/06
Abstract:
Wide-angle optical functionality is beneficial for imaging and image projection devices. Conventionally, wide-angle operation is attained by a complicated assembly of optical elements. Recent advances have led to meta-surface lenses or meta-lenses, which are ultra-thin planar lenses with nanoantennas that control the phase, amplitude, and/or polarization of light. Here, we present a meta-lens capable of diffraction-limited focusing and imaging over an unprecedented >170 angular field of view (FOV). The lens is integrated on a one-piece flat substrate and includes an aperture on one side and a single meta-surface on the other side. The meta-surface corrects third-order Seidel aberrations, including coma, astigmatism, and field curvature. The meta-lens has a planar focal plane, which enables considerably simplified system architectures for imaging and projection. The meta-lens design is generic and can be readily adapted to different meta-atom geometries and wavelength ranges to meet diverse application demands.

Integrated Freeform Optical Couplers

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US Patent:
20200225401, Jul 16, 2020
Filed:
Nov 15, 2019
Appl. No.:
16/685201
Inventors:
Shaoliang YU - Cambridge MA, US
Haijie ZUO - Quincy MA, US
Juejun Hu - Newton MA, US
Tian GU - Fairfax VA, US
International Classification:
F21V 8/00
G02B 6/12
Abstract:
Reflecting light beams off of microscale three-dimensional (3D) freeform surfaces can yield highly efficient coupling into and out of optical waveguides, optical fibers, and photonic chips. The structure of the 3D freeform reflective surface determines the shape of the reflected beam. This allows freeform reflectors to control the mode profile, rotation angle, and divergence angle of light beams. Control of beam shape enables mode matching between source output mode and target input mode, which results in low-loss optical coupling. An inventive freeform reflective surface can direct light beams in plane or out of plane via specular reflection or total internal reflection. A photonic integrated circuit with this type of freeform optical coupler can operate with a bandwidth range of at least 400 nm, potentially encompassing all visible or telecommunications wavelengths, and can be volume manufactured in photonic chips.

Methods And Apparatus For Spectral Imaging

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US Patent:
20170299434, Oct 19, 2017
Filed:
May 23, 2017
Appl. No.:
15/602323
Inventors:
Juejun Hu - Newton MA, US
Tian GU - Fairfax VA, US
Kazumi WADA - Lexington MA, US
Anuradha Murthy AGARWAL - Weston MA, US
Lionel Cooper KIMERLING - Concord MA, US
Derek Matthew KITA - Cambridge MA, US
Junying LI - Somerville MA, US
Fleur Jacolien FOK - Delft, NL
International Classification:
G01J 3/12
G01J 3/02
G01J 3/02
G01J 3/28
Abstract:
An apparatus for generating a spectral image includes a filter to receive incident light. The filter has a variable refractive index. The apparatus also includes a modulator, operably coupled to the filter, to modulate the variable refractive index of the filter so as to generate a plurality of optical patterns from the incident light. The plurality of optical patterns represents the spectral image and each optical pattern in the plurality of optical patterns corresponds to a different modulation of the variable refractive index. The apparatus further includes a detector, in optical communication with the filter, to detect the plurality of optical patterns.

Apparatus, Systems, And Methods For On-Chip Spectroscopy Using Optical Switches

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US Patent:
20170227399, Aug 10, 2017
Filed:
Feb 10, 2017
Appl. No.:
15/429321
Inventors:
Juejun Hu - Newton MA, US
Tian Gu - Fairfax VA, US
Hongtao Lin - Somerville MA, US
Derek Matthew Kita - Cambridge MA, US
Anuradha M. Agarwal - Weston MA, US
International Classification:
G01J 3/453
G02F 1/313
G01J 3/02
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.
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Tian Min Gu from Kirkland, WA, age ~73 Get Report