课程教学

开设并讲授4门课程:

 2门研究生专业课:<Applied Physical Optics>, <Nanophotonics: Principles and Applications>,全英文授课

 1门本科生必修课: <Academic English Practice>,全英文授课

 1门本科生限选课:《纳米光学》,双语教学

 

Applied Physical Optics

Course description:

This is a one-semester course for postgraduate students, teaching the knowledge and methodologies regarding the wave nature of light in an advanced level (in comparison with the Physical Optics course for undergraduate students). Topics include the nature of light, the electromagnetic theory of optical waves, light-matter interaction, the propagation (reflection, refraction, and scattering), coherence, interference, diffraction, and polarization of light, as well as the fundamentals of Fourier optics, crystal optics, nonlinear optics, and several selected topics on modern optics (lasers, holography, fiber optics, etc.)

Course objectives:

The primary objective of this course is to enable the students to gain a comprehensive and in-depth understanding of the concepts, theories, and methodologies of physical optics, to the extent that they are capable of applying the leant knowledge and skills in their research and engineering work. The secondary objective is to train the students to be adaptive to study optics in an international mode, by teaching the course in a complete English environment.

Learning methods:

Lectures, homework, self-study of assigned topics, and final exam. The course is taught in English.

Required previous knowledge:

Basics of optics (college physics or optics courses for undergraduate students), basic electromagnetism.

Course materials:

Lecture notes (PPT files) and other supplementary materials available on course website

Course textbook:

Optics (4th edition), by A. Ghatak (Tsinghua University Press, 2010)

Reference books:

Optics (4th edition), by E. Hecht (Higher Education Press, 2005)

Principles of Optics (7th edition), by M. Born and E. Wolf (Cambridge, 1999)

Optics: Principles and Applications, by K. K. Sharma (Academic Press, 2006)

Modern Classical Optics, by G. Brooker (Science Press, 2009)

Principles of Physical Optics, by C. A. Bennett (Wiley, 2008)

Optics and Photonics: an Introduction, by F. G. Smith and T. A. King (Wiley, 2000).

 

Nanophotonics: Principles and Applications

Content of the course:

Nanophotonics has been a rapidly evolving multidisciplinary branch of optics and photonics nowadays, with a wide scope of coverage. This course aims to provide students some fundamental knowledge and methodologies on nanophotonic materials and devices, by focusing on several frontier subfields including plasmonics, metamaterials, subwavelength gratings, and near-field optics.  The emphases of the course are on the fundamental principles, applications, and recent developments of the nanophotonic devices.  The related numerical modeling methods, nanofabrication techniques, and characterization methods of the nanostructures and fields will also be introduced.

Learning outcome:

By learning the course, the students are expected to grasp the fundamental knowledge and methodologies that can be applied in their research work with topics related to nanophotonics.

Learning methods:

Lectures, homework, lab tour, and final project (report + presentation).

Required previous knowledge:

Basic electromagnetism, physical optics.

Course materials:

Lecture notes + recommended textbooks (can be found in Tsinghua library)

 Fundamentals:

Nanophotonics, Paras N. Prasad (Wiley-Interscience, 2004).

Principles of Nano-Optics, Lukas Novotny and Bert Hecht (Cambridge Univ. Press, 2006).

 Near-field optics:

Near Field Optics, Dieter W. Pohl and Daniel Corjon (Kluwer Academic, 1993).

Near-field Microscopy and Near-field Optics, Daniel Courjon (Inperial College Press, 2003).

 Plasmonics:

Plasmonics: Fundamentals and Applications, Stefan A. Maier (Springer, 2007).

Surface Plasmons on Smooth and Rough Surfaces and on Gratings, Heinz Raether (Springer, 1988).

 Metamaterials:

Electromagnetic Metamaterials: Physics and Engineering Explorations, Nader Engheta and Richard W Ziolkowski (Wiley-IEEE Press, 2006).

 Subwavelength gratings:

Diffraction Gratings and Applications, E. G. Loewen and E. Popov (Marcel Dekker, 1997).

Course outline:

Lecture 1: Introduction

 Course information & logistics

 Introduction to nanophotonics: understand nanoscale, what is nanophotonics, why nanophotonics, content of this course, nanophotonics examples, nanophotonics applications.

Lecture 2: Light-matter interaction

 Electromagnetic wave: Maxwell’s equations, boundary conditions, constitutive equations, wave equation, time- and spatial-harmonic field.

 Dispersion of materials: what is dispersion, k-ω dispersion relation, phase and group velocities (in k-ω plot).

 Microscopic and macroscopic theories of materials: free and bound electrons, band structures of materials, EM response of insulators (Lorentz model).

 Example of engineering light-matter interaction with nanostructures – form birefringence.

Lecture 3: Metal optics & volume plasmons

 What is plasmon: plasmons (plasma) in universe, plasmons in metal.

 Metal optics: EM response of metals (Drude model), permittivity ε at plasma frequency.

 Volume plasmons: physical nature of volume plasmons, properties of volume plasmons, application of volume plasmons in nanophotonics (inverse wire-grid polarizer).

Lecture 4: Surface plasmon polaritons

 Surface plasmon polaritons (SPPs): TM excitation, confined surface wave, dispersion relation of SPPs, plasmon dispersion in full spectrum and of real metals, transverse and longitudinal oscillations of SPPs, SPP wavelength, short-wavelength limit at ωsp, propagation length and loss of SPPs (three characteristic lengths).

 SPPs in multilayer systems: dispersion relation of coupled SPP modes, IMI & MIM heterostructures, odd & even modes (LRSPP & SRSPP), properties of the coupled modes.

Lecture 5: Excitation & characterization of SPPs

 Excitation of SPPs: prism coupling, excitation by highly focused beam, grating coupling, excitation by scattering, near-field excitation, other coupling schemes.

 Characterization of SPPs: near-field microscopy, leakage radiation microscopy, fluorescence imaging, scattered light imaging.

Lecture 6: Localized surface plasmons

 LSPs of metallic nanoparticles: difference of LSPs with SPPs, color effect of metallic nanoparticles, various metallic nanoparticles

 Resonance condition of LSPs: review of dipole radiation, LSPs of nanospheres (quasi-static approximation), Fröhlich condition, size- and shape-dependence of LSPR (Mie theory), LSPs of nanorods (Gans theory)

 Coupling of LSPs between nanoparticles: transverse and longitudinal modes, near-field enhancement in gaps

 LSPs of complex nanostructures: LSPs of nanosphere vs. nanocavity, plasmon hybridization in nanoshells

 Comparison of volume plasmons, SPPs, and LSPs

Lecture 7: Plasmonic circuitry

 Why plasmonic circuitry? – a potential solution for future information technology.

 Components of plasmonic circuitry: SPP waveguides, routing of SPPs (mirrors, splitters, multiplexers & demultiplexers, couplers, filters), SPP sources and launchers, active modulation of SPPs (switches and modulators), amplification of SPPs, detection of SPPs

 Perspectives of plasmonic circuitry.

Lecture 8: Near-field optics (I)

 Fundamentals of near-field optics and near-field optical imaging, principles of the nano-optical detection based on evanescent field, introduction to the scanning probe microscopy (SPM) family and some theoretical issues.

Lecture 9: Near-field optics (II)

 Nano-optical detection based on near-field optics: scanning near-field optical microscope (SNOM), photon scanning tunneling microscopy (PSTM), total internal reflection fluorescence microscope (TIRFM), etc.

 Applications: high-resolution imaging, characterization of near-field parameters (amplitude, intensity, phase, polarization, etc.) and topography of nanostructures, single molecular fluorescence and localized spectrum, tip-enhanced Raman scattering (TERS), trapping and manipulation at the molecular level; applications of SPM in characterizing photonic crystals, plasmonic devices, metamaterials, etc.

Lecture 10: Subwavelength resonance gratings

 Introduction: diffraction gratings with d ~ λ, zero-order regime, grating performance

 Optical anomalies in subwavelength grating: Rayleigh anomaly, resonance anomaly, non-resonance anomaly

 Guided-mode resonance (GMR) gratings: geometry of GMR grating, excitation of leaky guided modes, consequences of GMR (far-field & near-field), applications (guided-mode resonance filter, biosensing, enhanced magneto-optic effect)

 Surface plasmon resonance (SPR) gratings: extraordinary transmission (properties & mechanisms), enhanced near-field effects and nonlinearities (sensing, SERS, and enhanced SHG)

Lecture 11: Numerical modeling methods

 Overview of numerical methods for nanophotonics: frequency-domain vs. time-domain, domain- discretization vs. boundary-discretization, periodic vs. aperiodic, near-field vs. far-field, importance of understanding the principles and limitations of different methods

 Finite difference time domain (FDTD) method: principle, capabilities, advantages & disadvantages

 Finite element method (FEM): principle, capabilities, advantages & disadvantages

 Fourier modal method (FMM / RCWA): principle, capabilities, advantages & disadvantages

Lecture 12: Metamaterials

 Fundamentals: definition and characteristics of metamaterials, NIM & chiral metamaterials

 Properties of negative-index metamaterials (NIMs): classification of materials in ε-μ diagram, consequences of simultaneously negative ε and μ (NRI, left-handed wave, backward wave, reversal of physical effects)

 Realization of NIMs: engineering ε (metal nanorod array, form birefringence), engineering μ (split ring resonator, etc.), realization of NIMs, optical SNGs and DNGs, progress of EM metamaterials

 Applications of metamaterials: perfect lens, superlens vs. hyperlens, cloaking (transformation optics)

 Challenges and perspectives of metamaterials

Lecture 13: Chiral metamaterials

 What is chirality: chirality & enantiomers, chirality in one, two, and three dimensions

 Light-matter interaction in chiral media: polarization of light, optical activity (phenomenon & mechanism), circular birefringence, circular dichroism, Kramers-Kronig relations between θ and χ

 Planar chiral metamaterials (PCMs): structure of PCMs, polarization properties, novel polarizing elements

 Planar chiral resonance gratings: all-dielectric chiral GMR gratings, metallic chiral SPR gratings

 Perspectives: 3D chiral metamaterials, chiral route to negative refraction

Lecture 14: Nanofabricaiton

 Overview of nanofabrication techniques: top-down approaches vs. bottom-up approaches

 Nanolithography: general flow chart, film deposition techniques, exposure techniques (laser interference lithography, EBL, immersion lithography), patter transfer techniques (lift-off, dry etching, wet etching)

 Direct milling techniques: focused ion beam (FIB) milling, direct laser writing

 Replication techniques: nanoimprinting

 Final remarks of this course: perspectives of nanophotonics, famous scientists and research groups, Internet resources, international organizations & conferences

Lecture 15: Seminar (final project)

 Each student gives a 15-minute presentation based on their literature report (if the time is not enough, an extracurricular seminar will be arranged)

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最后更新于2016912