Mohamad G. Banaee

Harvard University

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Kenneth B. Crozier

ARC Centre of Excellence for Transformative Meta-Optical Systems

Jeff F. Young

University of British Columbia

Yizhuo Chu

Harvard University

Wenqi Zhu

National Institute of Standards and Technology

Dongxing Wang

Wuhan University

Paul Peng

Harvard University

Georg W. Rieger

University of British Columbia

A.R. Cowan

University of British Columbia

R.M. Swanson

SunPower (Germany)

Murray W. McCutcheon

GlobalFoundries (United States)

Cooperative Institutions

Harvard University

Massachusetts Institute of Technology

Harvard University Press

University of British Columbia

University of Toronto

Acacia Research Corporation (United States)

Nokia (United States)

Lawrence Berkeley National Laboratory

Friedrich-Alexander-Universität Erlangen-Nürnberg

University of California, Berkeley

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High-order soliton breakup and soliton self-frequency shifts in a microstructured optical fiber

Journal of the Optical Society of America B (2006)

Mohamad G. Banaee Jeff F. Young

Ultrashort pulse propagation in a polarization-maintaining microstructured fiber (with 1 μm core diameter and 1.1 m length) is investigated experimentally and theoretically. For an 80 MHz train of 130 fs pulses with average powers up to 13.8 mW launched into the lowest transverse mode of the fiber, the output spectra consist of discrete, multiple solitons that shift continuously to lower energies. The number of solitons and the amount that they shift both increase with the launched power. All of the data are quantitatively consistent with solutions of the nonlinear Schrödinger equation, but only when the Raman nonlinearity is treated without approximation, and self-steepening is included. These results remove any ambiguity as to the nature of these multiple solitons; they arise owing to the breakup of high-order solitons in the presence of nonlinear processes beyond self-phase modulation.

Self-focusing

Self-phase modulation

10.1364/josab.23.001484

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Citations (39)

High-order soliton break up in sub-picosecond pulse propagation through photonic crystal fibers

Mohamad G. Banaee Jeff F. Young

Numerical calculations of pulse propagation in microstructured fibers show that Raman scattering and self-phase modulation are responsible for an observed series of discrete spectral components through break up of high-order solitons and soliton self-frequency shifting.

Picosecond

Self-phase modulation

10.1109/cleo.2005.201991

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Nonlinear response of two-dimensional waveguide-based photonic crystals and microstructured fibres

Mohamad G. Banaee

Waveguide

10.14288/1.0085197

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Mixed Dimer Double-Resonance Substrates for Surface-Enhanced Raman Spectroscopy

ACS Nano (2010)

Mohamad G. Banaee Kenneth B. Crozier

Surface-enhanced Raman spectroscopy is performed on pairs of gold nanoparticles, for which the nanoparticles in each pair have different shapes. The dimers therefore exhibit two plasmon resonances. These structures, termed mixed dimer double-resonance substrates, enable strong field enhancement at pump and Stokes frequencies in surface-enhanced Raman spectroscopy. The extinction spectra of mixed dimers are measured and simulated to identify their plasmon resonances. The experimentally determined enhancement factors of double-resonance structures are compared to those of single-resonance substrates.

Resonance Raman spectroscopy

Surface-Enhanced Raman Spectroscopy

10.1021/nn102726j

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Citations (84)

Tuning photonic crystal waveguide modes via optically generated free carriers

APS March Meeting Abstracts (2004)

Jessica P. Mondia Hong Tan Stefan Lindén H. M. van Driel Mohamad G. Banaee

Free carrier

Waveguide

Source

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O, E, S, C, and L Band Silicon Photonics Coherent Modulator/Receiver

C. R. Doerr L. Chen Torben Nielsen Ricardo Aroca Li Chen

We present a monolithic silicon photonic integrated circuit coherent modulator and receiver that works from 1260 to 1630 nm. We demonstrate 200-Gb/s unamplified 16-QAM transmission and long-range optical coherence tomography.

Electro-optic modulator

Modulation (music)

10.1364/ofc.2016.th5c.4

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Citations (43)

Nonlinear responses of 2D photonic crystal waveguides

Jeff F. Young A.R. Cowan Georg W. Rieger Mohamad G. Banaee

This paper focuses on the third order nonlinear response of 1D waveguide modes, and how they nonlinearly couple to 0D localized photon states. A complete analytic treatment of this problem, that allows for a complex third order susceptibility and downstream, nonresonant scattering, suggests that optical bistability should be achievable at average power levels of only a few milliwatts. Furthermore, appropriately designed waveguides can exhibit strong optical limiting behaviour as shown by experimental results. This saturated transmission of pulses from an optical parametric oscillator is due to two-photon absorption in the silicon slab used to fabricate the waveguide.

Waveguide

Optical Bistability

Bistability

Slab

10.1109/leosst.2003.1224258

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Lithographically Fabricated Optical Antennas with Sub-10nm Gaps Formed by a Sacrifical Layer

Conference on Lasers and Electro-Optics (2010)

Wenqi Zhu Mohamad G. Banaee Kenneth B. Crozier

We lithographically fabricate arrays of optical antennas with ~6nm gaps. The enhancement factor from surface-enhanced Raman scattering measurement is ~5 times larger than the same structure with ~18nm gaps.

10.1364/qels.2010.qmh3

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Efficient coupling of photonic crystal microcavity modes to a ridge waveguide

Applied Physics Letters (2007)

Mohamad G. Banaee Andras G. Pattantyus‐Abraham Murray W. McCutcheon Georg W. Rieger Jeff F. Young

The unidirectional coupling of a microcavity mode to a ridge waveguide in a slab photonic crystal structure was investigated for the first time. Experimental observation of the coupling efficiency for the signal coupled out of the structure is in good agreement with the result of three-dimensional finite-difference time-domain simulations. The coupling efficiency of the cavity mode to the output channel is ∼60%.

Waveguide

Slab

Mode coupling

SIGNAL (programming language)

Coupled mode theory

Mode (computer interface)

10.1063/1.2737369

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Citations (22)

Discrimination of polymers by laser induced breakdown spectroscopy together with the DFA method

Polymer Testing (2012)

Mohamad G. Banaee Seyed Hassan Tavassoli