Slow light in Photonic Crystals

Slides:

Advertisements

Similar presentations

Rotation Induced Super Structure in Slow-Light Waveguides w Mode Degeneracy Ben Z. Steinberg Adi Shamir Jacob Scheuer Amir Boag School of EE, Tel-Aviv.

Advertisements

Nanophotonics Class 3 Photonic Crystals. Definition: A photonic crystal is a periodic arrangement of a dielectric material that exhibits strong interaction.

WP5: OTDM-to-WDM conversion update ORC CONTRIBUTION – F. Parmigiani TRIUMPH meeting

Light Waves and Polarization Xavier Fernando Ryerson Communications Lab

Optical sources Lecture 5.

Waveguides Part 2 Rectangular Waveguides Dielectric Waveguide

Mikhail Rybin Euler School March-April 2004 Saint Petersburg State University, Ioffe Physico-Technical Institute Photonic Band Gap Structures.

Collinear interaction of photons with orbital angular momentum Apurv Chaitanya N Photonics science Laboratory, PRL.

Shaping the color Optical property of photonic crystals Shine.

Photonic Crystals: Controlling and Sensing Light for both Evanescent and Propagating Fields Shanhui Fan Department of Electrical Engineering Stanford University.

Coupled resonator slow-wave optical structures Parma, 5/6/2007 Jiří Petráček, Jaroslav Čáp

Plasmonics in double-layer graphene

Slow light in photonic crystal waveguides Nikolay Primerov.

EE 230: Optical Fiber Communication Lecture 13

EE 230: Optical Fiber Communication Lecture 6 From the movie Warriors of the Net Nonlinear Processes in Optical Fibers.

Sharp resonance of multimode periodic waveguide open resonator defined in SOI Ph.D student: Nikolay Piskunov Supervisor: Henri Benisty Institut d’Optique.

Lecture 3 Optical fibers

Introduction: Optical Microscopy and Diffraction Limit

Slow light: The route to faster communications

SURFACE PLASMON POLARITONS. SPPs Pioneering work of Ritchie (1957) Propagate along the surface of a conductor Trapped on the surface because of their.

George R. Welch Marlan O. Scully Irina Novikova Andrey Matsko M. Suhail Zubairy Eugeniy Mikhailov M. Suhail Zubairy Irina Novikova Andrey Matsko Ellipticity-Dependent.

Broad-band nano-scale light propagation in plasmonic structures Shanhui Fan, G. Veronis Department of Electrical Engineering and Ginzton Laboratory Stanford.

Dispersion Measurements Lecture-3. Dispersion Measurements Measurement of Intermodal Dispersion The most common method for measuring multimode fiber bandwidth.

Guillaume TAREL, PhC Course, QD EMISSION 1 Control of spontaneous emission of QD using photonic crystals.

Nonlinear Optics in Silicon Core Fibers A. C. Peacock 1, P. Mehta 1, T. D. Day 2, J. R. Sparks 2, J. V. Badding 2, and N. Healy 1 POEM:2012 Nov

1/9/2007Bilkent University, Physics Department1 Supercontinuum Light Generation in Nano- and Micro-Structured Fibers Mustafa Yorulmaz Bilkent University.

Modeling light trapping in nonlinear photonic structures

Optical Fiber Basics-Part 2

FIBER PROPERTIES Transmission characteristics of a fiber depends on two important phenomena Attenuation Dispersion Attenuation or transmission loss Much.

MODULATION AIDA ESMAEILIAN 1. MODULATION  Modulation: the process of converting digital data in electronic form to an optical signal that can be transmitted.

1 Roland Kersting Department of Physics, Applied Physics, and Astronomy The Science of Information Technology Computing with Light the processing.

WHY ???? Ultrashort laser pulses. (Very) High field physics Highest peak power, requires highest concentration of energy E L I Create … shorter pulses.

Optical Filter 武倩倩 Outline Introduction to silicon photonics Athermal tunable silicon optical filter Working principle Fabricated device Experiments.

Electro-optic Effect made simple? David A. Reis FOCUS Center and Department of Physics, University. of Michigan.

Ultra-short pulse operation of all-optical fiber passively mode-locked

All-optical control of light on a silicon chip Vilson R. Almeida, Carlos A. Barrios, Roberto R. Panepucci & Michal Lipson School of Electrical and Computer.

Progress towards laser cooling strontium atoms on the intercombination transition Danielle Boddy Durham University – Atomic & Molecular Physics group.

Optical Amplifiers By: Ryan Galloway.

The design of dielectric environment for ultra long lifetime of graphene plasmon Dr. Qing Dai 22/10/2015.

Lecture 4. Pulse Propagation in Fibers Problem: Inject an optical pulse of width  0 into the fiber at z = 0. What is the speed of propagation and what.

Artificial meta-materials with periodically modulated dielectric constant (periodicity in optical properties, lattice constant  light wavelength) “Periodic.

Michael Scalora U.S. Army Research, Development, and Engineering Center Redstone Arsenal, Alabama, & Universita' di Roma "La Sapienza" Dipartimento.

Phase velocity. Phase and group velocity Group velocity.

Silicon Photonics(15/2) Minkyu Kim Paper Review Nanophotonics, 2014 I.Introduction II.Performance metrics of modulators III.Design of modulators IV.Current.

Chapter 3 Signal Degradation in Optical Fibers

Four wave mixing in submicron waveguides

Photonic Bandgap (PBG) Concept

Silicon nanotapers for fiber-to-waveguide coupling

Plasmonic waveguide filters with nanodisk resonators

Superconducting Electromagnetic

GROUP DELAY Group delay per unit length can be defined as:

Laboratoire d’Optique Appliquée

Tbit/s Optical Data Transmission

The University of Adelaide, School of Computer Science

The Role of Light in High Speed Digital Design

Slow Light Photon Physics Anke Kuijk

Bi-plasma interactions on femtosecond time-scales

Principle of Mode Locking

High Power, Uncooled InGaAs Photodiodes with High Quantum Efficiency for 1.2 to 2.2 Micron Wavelength Coherent Lidars Shubhashish Datta and Abhay Joshi.

Tunable Slow Light in Cesium Vapor

? Enhancement of light-matter interactions in slow-wave metasurfaces ?

Microwave Engineering

Why Do CPO Lead to Slow Light When the Laser

Marco Polo, Daniel Felinto and Sandra Vianna Departamento de Física

Complex Nanophotonics

Fiber Laser Part 1.

1. Uniform dielectrics, not absorbing

Fig. 4 Temporal-mode selective pulse retrieval using ac Stark pulses.

Presentation transcript:

Slow light in Photonic Crystals Jana Jagerska, IPEQ-LOEQ

Jana Jagerska, IPEQ-LOEQ Overview Slow light in PhCs - the physics behind Why is slow light interesting? Challenges: bandwidth, losses, dispersion, coupling to the slow light modes Devices for slow light operation Characterization and measurement techniques 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Jana Jagerska, IPEQ-LOEQ The physics behind Slow light effect - based on coupled resonances PhC: slow Bloch modes , waveguides at cut-off (W1), mini-stopbands (W3)… Spectral regions of “flat” dispersion 0.289 0.376 Coupled resonances between electron and photon in atomic gasses - electromagnetically induced transparency Or resonance of optical modes in 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Jana Jagerska, IPEQ-LOEQ The physics behind W1 waveguide: Omnidirectional reflection Backscattering 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Jana Jagerska, IPEQ-LOEQ Why slow light? Improved light-matter interaction Intensity… scales with the slowdown factor Nonlinear interactions, reduced control power in tunable devices… Effective phase change enhancement (switches modulators) Towards compact devices Light delay Towards optical buffers 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Light-matter interaction Spatial compression of light pulses upon entering the slow-light regime Intensity enhancement IDEAL CASE ! Phase-change enhancement Small change of material index - abrupt change in phase Compact & faster devices, low switching powers 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Jana Jagerska, IPEQ-LOEQ Challenges Operation bandwidth Dispersion High propagation loss, effect of disorder Coupling issues Tunability … 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Challenges: Bandwidth Standard W1 ‘Slow’ W1 Structures with moderate slowdown factor (vg = 10-100) have several nm bandwidth around 1550 nm, corresponding to 1 THz or more 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Challenges: Dispersion Parabolic flat bands: large group velocity dispersion: Distortion of pulse envelope Nonzero vg, constant slope Fast light Slow light 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Losses & coupling issues Propagation loss scales with 1/ng2 for parabolic bands: Increased light-matter interaction higher sensitivity to disorder + backscattering higher propagation loss Fast mode Slow mode Coupling efficiency: mode transformers (tapers), crystal termination or both 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Jana Jagerska, IPEQ-LOEQ Device Concepts Y.A. Vlasov et al., “Active control of slow light on a chip with photonic crystal waveguides”, Nature 438, pp.65-68, 2005. M. Notomi et al., Extremely large group velocity dispersion of line-defect waveguides in photonic crystal slabs”, PRL 87, 253902 (2001) Slow-light modulator 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Jana Jagerska, IPEQ-LOEQ Device Concepts T. Baba, D. Mori, J. Phys. D 40, 2659, (2005) Shifting of an ideal band using a chirped structure GVD compensation Coupling loss reduction Effective pulse delay ~ ns in sub-mm devices 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Measurement techniques Time resolved SNOM M. L. M. Balistreri, H. Gersen et al., Science 294 (2001) p. 1080 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Measurement techniques Transmission resonances: Attenuated Total Reflection: M. Galli et al., J. Sel. Areas in Communications 23,1402, (2005) Y.A. Vlasov et al., “Active control of slow light on a chip with photonic crystal waveguides”, Nature 438, pp.65-68, 2005. 1/2/2019 Jana Jagerska, IPEQ-LOEQ

Thank you for your attention. Information Sources T. F. Krauss, J. Phys. D 40, 2666, (2005) T. Baba, D. Mori, J. Phys. D 40, 2659, (2005) Vlasov et al., Nature 438, 65, (2005) Notomi et al., PRL 87, 253902, (2001) … Thank you for your attention. 1/2/2019 Jana Jagerska, IPEQ-LOEQ