Energy-bandwidth trade-off in all-optical photonic crystal microcavity switches

Heuck, Mikkel; Kristensen, Philip Trøst; Mørk, Jesper

doi:10.1364/oe.19.018410

Cited by 21 publications

(28 citation statements)

References 15 publications

(28 reference statements)

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“…The pulse duration is arbitrary chosen such that it is longer than τ in order to avoid a transient excitation of the cavity [18]. When the pulse carrier frequency coincides with the resonance frequency ω res0 , the temporal evolution of the intra-cavity power P u (t) is represented by the black solid line in Figure 2 curve, which shows a frequency blue-shift of about 6/τ (i.e.…”

Section: Nonlinear Microcavity Dynamicsmentioning

confidence: 99%

Coherent excitation of a nonlinear microcavity

Oden

Trebaol

Delaye

et al. 2013

JEOS:RP

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Coherent excitation of a nonlinear semiconductor microcavity is theoretically reported. It intends to counterbalance the frequency drift of the cavity resonance driven by the nonlinear refractive effects, which causes a limitation in the energy coupling efficiency of an input pulse into the cavity resonance. We show that exciting such a nonlinear microcavity with tailored chirped pulses allows to maintain the benefit of light localization and to further enhance light-matter interactions, opening the way to the realization of highly efficient nonlinear devices.

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Section: Nonlinear Microcavity Dynamicsmentioning

confidence: 99%

Coherent excitation of a nonlinear microcavity

Oden

Trebaol

Delaye

et al. 2013

JEOS:RP

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“…A detailed analysis (SI, section B.3) based on temporal coupled mode theory further supports the conclusion that Fano structures are superior to Lorentzian structures for high-speed signal-processing. We notice that the Lorentzian structure exhibits an oscillatory characteristic in the initial decay, which is due to interference beating between the signal and cavity mode 6,29 . Finally, to investigate the system properties, we characterize the BER when the Fano structure is used to modulate a weak continuous wave probe with a data-modulated pump signal.…”

mentioning

confidence: 92%

Fano resonance control in a photonic crystal structure and its application to ultrafast switching

Yu¹,

Heuck²,

Hu³

et al. 2014

Applied Physics Letters

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116

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Fano resonances appear in quantum mechanical as well as classical systems as a result of the interference between two paths: one involving a discrete resonance and the other a continuum. Compared to a conventional resonance, characterized by a Lorentzian spectral response, the characteristic asymmetric and "sharp" spectral response of a Fano resonance is suggested to enable photonic switches and sensors with superior characteristics. While experimental demonstrations of the appearance of Fano resonances have been made in both plasmonic and photonic-crystal structures, the control of these resonances is experimentally challenging, often involving the coupling of near-resonant cavities. Here, we experimentally demonstrate two simple structures that allow surprisingly robust control of the Fano spectrum. One structure relies on controlling the amplitude of one of the paths and the other uses symmetry breaking. Short-pulse dynamic measurements show that besides drastically increasing the switching contrast, the transmission dynamics itself is strongly affected by the nature of the resonance. The influence of slow-recovery tails implied by a long carrier lifetime can thus be reduced using a Fano resonance due to a hitherto unrecognized reshaping effect of the nonlinear Fano transfer function. For the first time, we present a system application of a Fano structure, demonstrating its advantages by the experimental realization of 10 Gbit/s all-optical modulation with bit-error-ratios on the order of 10 -7 for input powers less than 1 mW. These results represent a significant improvement compared to the use of a conventional Lorentzian resonance.Ultra-compact photonic structures that perform optical signal processing such as modulation and switching at high-speed with low-energy consumption are essential for enabling integrated photonic chips that can meet the growing demand for information capacity . It remains, however, an important task to identify and demonstrate PhC structures that can meet the low-energy and high-bandwidth requirement. In cavity-based switches an applied control signal changes the refractive index of the cavity, thereby shifting the cavity resonance and modulating the transmission of the data signal. The shape of the transmission spectrum is then very important, since it determines the refractive

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“…It has recently been illustrated how this type of coherent control can improve the energy efficiency [1] and opens possibilities for switching controlled entirely by the phase of the input light [2]. Regardless of the particular choice of operating principle, there is a need for fast switching of the energy in the cavity between the values U on and U off , corresponding to the "on" and "off" state of the switch, since residual energy may lead to unwanted patterning effects [3]. We show, that within the limits of our model, coherent control provides an approach for arbitrarily fast switching of the energy in the cavity.…”

Section: Introductionmentioning

confidence: 99%