Prof. Che Ting Chan Profile

KEYWORDS: Phase matching, Interfaces, Photonic crystals, Plasmonics, Photonics systems, Phase measurement, Physics, Dielectrics, Mirrors, Polarization

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Proceedings Article | 9 November 2016 Presentation

Photonic crystals possessing single and double Weyl points (Conference Presentation)

Che Ting Chan

Proceedings Volume 9920, 99201K (2016) https://doi.org/10.1117/12.2237703

KEYWORDS: Photonic crystals, Physics, Chemical species, Dielectrics, Metalloids, Dispersion, Scattering, Current controlled current source

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Proceedings Article | 5 October 2015 Presentation

Transport properties of pseudospin-1 photons (Presentation Recording)

Che Ting Chan, Anan Fang, Zhao-Qing Zhang, Steven Louie

Proceedings Volume 9546, 95461D (2015) https://doi.org/10.1117/12.2188907

KEYWORDS: Photons, Graphene, Collimation, Electron beams, Photonic crystals, Dispersion, Wave propagation, Refractive index, Interfaces, Photon transport

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Pseudospin is of central importance in governing many unusual transport properties of graphene and other artificial systems which have pseudospins of 1/2. These unconventional transport properties are manifested in phenomena such as Klein tunneling, and collimation of electron beams in one-dimensional external potentials. Here we show that in certain photonic crystals (PCs) exhibiting conical dispersions at the center of Brillouin zone, the eigenstates near the “Dirac-like point” can be described by an effective spin-orbit Hamiltonian with a pseudospin of 1. This effective Hamiltonian describes within a unified framework the wave propagations in both positive and negative refractive index media which correspond to the upper and lower conical bands respectively. Different from a Berry phase of π for the Dirac cone of pseudospin-1/2 systems, the Berry phase for the Dirac-like cone turns out to be zero from this pseudospin-1 Hamiltonian. In addition, we found that a change of length scale of the PC can shift the Dirac-like cone rigidly up or down in frequency with its group velocity unchanged, hence mimicking a gate voltage in graphene and allowing for a simple mechanism to control the flow of pseudospin-1 photons. As a photonic analogue of electron potential, the length-scale induced Dirac-like point shift is effectively a photonic potential within the effective pseudospin-1 Hamiltonian description. At the interface of two different potentials, the 3-component spinor gives rise to distinct boundary conditions which do not require each component of the wave function to be continuous, leading to new wave transport behaviors as shown in Klein tunneling and supercollimation. For examples, the Klein tunneling of pseudospin-1 photons is much less anisotropic with reference to the incident angle than that of pseudospin-1/2 electrons, and collimation can be more robust with pseudospin-1 than pseudospin-1/2. The special wave transport properties of pseudospin-1 photons, coupled with the discovery that the effective photonic “potential” can be varied by a simple length-scale change, may offer new ways to control photon transport. We will also explore the difference between pseudospin-1 photons and pseudospin-1/2 particles when they encounter disorder.

Proceedings Article | 17 August 2014 Paper

Chirality enables unusual optical force (presentation video)

Shubo Wang, Che Ting Chan

Proceedings Volume 9163, 91631V (2014) https://doi.org/10.1117/12.2062811

KEYWORDS: Particles, Video, Plasmonics, Nanostructures, Optical properties, Current controlled current source

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Proceedings Article | 10 October 2012 Paper

Transverse force profiles of individual dielectric particles in an optical trap

Ming-Tzo Wei, Jack Ng, C. T. Chan, Arthur Chiou, H. Daniel Ou-Yang

Proceedings Volume 8458, 84580Z (2012) https://doi.org/10.1117/12.930079

KEYWORDS: Particles, Optical tweezers, Transducers, Mie scattering, Dielectrics, Nonlinear optics, Gaussian beams, Calibration, Objectives, Geometrical optics

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Proceedings Article | 20 August 2009 Paper

Measurement of optical binding force between two colloidal particles

Ming-Tzo Wei, Jack Ng, C. T. Chan, H. Daniel Ou-Yang

Proceedings Volume 7400, 74001E (2009) https://doi.org/10.1117/12.826398

KEYWORDS: Particles, Optical binding, Optical tweezers, Dielectric polarization, Dielectrics, Mie scattering, Optical testing, Optical spheres, Polarization, Objectives

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Proceedings Article | 28 September 2007 Paper

Plasmonic modes in periodic metal nanoparticle structures

K. Fung, C. Chan

Proceedings Volume 6642, 664214 (2007) https://doi.org/10.1117/12.730190

KEYWORDS: Polarizability, Plasmonics, Metals, Nanoparticles, Particles, Absorption, Dispersion, Polarization, Laser induced plasma spectroscopy, Dielectrics

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Showing 5 of 11 publications

Conference Committee Involvement (35)

Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXII

18 August 2024 | San Diego, California, United States

Active Photonic Platforms (APP) 2024

18 August 2024 | San Diego, California, United States

Plasmonics VII

14 October 2023 | Beijing, China

Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI

20 August 2023 | San Diego, California, United States

Active Photonic Platforms (APP) 2023

20 August 2023 | San Diego, California, United States

Metamaterials XIV

26 April 2023 | Prague, Czech Republic

Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XX

21 August 2022 | San Diego, California, United States

Active Photonic Platforms (APP) 2022

21 August 2022 | San Diego, California, United States

Plasmonics VI

10 October 2021 | Nantong, JS, China

Active Photonic Platforms XIII

2 August 2021 | San Diego, California, United States

Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIX

1 August 2021 | San Diego, California, United States

Metamaterials XIII

19 April 2021 | Online Only, Czech Republic

Plasmonics V

12 October 2020 | Online Only, China

Active Photonic Platforms XII

24 August 2020 | Online Only, California, United States

Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII

24 August 2020 | Online Only, California, United States

Plasmonics IV

22 October 2019 | Hangzhou, China

Active Photonic Platforms XI

11 August 2019 | San Diego, California, United States

Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVII

11 August 2019 | San Diego, California, United States

Metamaterials

3 April 2019 | Prague, Czech Republic

Plasmonics III

12 October 2018 | Beijing, China

Active Photonic Platforms X

19 August 2018 | San Diego, California, United States

Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVI

19 August 2018 | San Diego, California, United States

Metamaterials, Metadevices, and Metasystems 2017

6 August 2017 | San Diego, California, United States

Active Photonic Platforms IX

6 August 2017 | San Diego, California, United States

Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XV

6 August 2017 | San Diego, California, United States

Metamaterials

26 April 2017 | Prague, Czech Republic

Plasmonics II

12 October 2016 | Beijing, China

Metamaterials, Metadevices, and Metasystems 2016

28 August 2016 | San Diego, California, United States

Active Photonic Materials VIII

28 August 2016 | San Diego, California, United States

Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV

28 August 2016 | San Diego, California, United States

Metamaterials, Metadevices, and Metasystems 2015

9 August 2015 | San Diego, California, United States

Plasmonics: Metallic Nanostructures and Their Optical Properties XIII

9 August 2015 | San Diego, California, United States

Plasmonics

9 October 2014 | Beijing, China

Metamaterials, Metadevices, and Metasystems 2014

17 August 2014 | San Diego, California, United States

Plasmonics: Nanoimaging, Nanofabrication, and Their Applications III

28 August 2007 | San Diego, California, United States

Showing 5 of 35 Conference Committees

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