Enhancing slow- and fast-light effects in quantum dot semiconductor waveguides through ultrafast dynamics

Yaohui Chen; Jesper Mørk

doi:10.1117/12.872866

Enhancing slow- and fast-light effects in quantum dot semiconductor waveguides through ultrafast dynamics

Yaohui Chen (Invited author), Jesper Mørk (Invited author)

Research output: Contribution to journal › Conference article › Research › peer-review

Abstract

In this paper we review our theoretical work on slow and fast light effects in quantum dot semiconductor optical amplifiers (QD SOAs), in particular we investigate the carrier dynamical contributions to the dynamic gain grating and cross gain modulation induced by unique ultrafast inter-subband carrier dynamics between discrete QD bound states. Our calculations predict that by increasing the injection current density, additional ultra-fast coherent gain contributions around 100GHz arise in contrast to the slow sub-gigahertz carrier density pulsation (CDP) effects. For potential applications in microwave photonics, especially targeting the millimeter wave range, we propose that quantum dot devices might be used to realize an optically fed microwave phase shifter in the frequency range of 100GHz.

Original language	English
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	7937
Issue number	1
Pages (from-to)	793709-11
ISSN	0277-786X
DOIs	https://doi.org/10.1117/12.872866
Publication status	Published - 2011
Event	Ultrafast Phenomena in Semiconductors and Nanostructure Materials XV - San Francisco, United States Duration: 24 Jan 2011 → 26 Jan 2011 Conference number: 15

Conference

Conference	Ultrafast Phenomena in Semiconductors and Nanostructure Materials XV
Number	15
Country/Territory	United States
City	San Francisco
Period	24/01/2011 → 26/01/2011

Keywords

Semiconductor optical amplifier
Quantum dot
Coherent population oscillations
Slow light
Cross gain modulation

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10.1117/12.872866

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title = "Enhancing slow- and fast-light effects in quantum dot semiconductor waveguides through ultrafast dynamics",

abstract = "In this paper we review our theoretical work on slow and fast light effects in quantum dot semiconductor optical amplifiers (QD SOAs), in particular we investigate the carrier dynamical contributions to the dynamic gain grating and cross gain modulation induced by unique ultrafast inter-subband carrier dynamics between discrete QD bound states. Our calculations predict that by increasing the injection current density, additional ultra-fast coherent gain contributions around 100GHz arise in contrast to the slow sub-gigahertz carrier density pulsation (CDP) effects. For potential applications in microwave photonics, especially targeting the millimeter wave range, we propose that quantum dot devices might be used to realize an optically fed microwave phase shifter in the frequency range of 100GHz.",

keywords = "Semiconductor optical amplifier, Quantum dot, Coherent population oscillations, Slow light, Cross gain modulation",

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year = "2011",

doi = "10.1117/12.872866",

language = "English",

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Enhancing slow- and fast-light effects in quantum dot semiconductor waveguides through ultrafast dynamics. / Chen, Yaohui (Invited author); Mørk, Jesper (Invited author).
In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 7937, No. 1, 2011, p. 793709-11.

Research output: Contribution to journal › Conference article › Research › peer-review

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N2 - In this paper we review our theoretical work on slow and fast light effects in quantum dot semiconductor optical amplifiers (QD SOAs), in particular we investigate the carrier dynamical contributions to the dynamic gain grating and cross gain modulation induced by unique ultrafast inter-subband carrier dynamics between discrete QD bound states. Our calculations predict that by increasing the injection current density, additional ultra-fast coherent gain contributions around 100GHz arise in contrast to the slow sub-gigahertz carrier density pulsation (CDP) effects. For potential applications in microwave photonics, especially targeting the millimeter wave range, we propose that quantum dot devices might be used to realize an optically fed microwave phase shifter in the frequency range of 100GHz.

AB - In this paper we review our theoretical work on slow and fast light effects in quantum dot semiconductor optical amplifiers (QD SOAs), in particular we investigate the carrier dynamical contributions to the dynamic gain grating and cross gain modulation induced by unique ultrafast inter-subband carrier dynamics between discrete QD bound states. Our calculations predict that by increasing the injection current density, additional ultra-fast coherent gain contributions around 100GHz arise in contrast to the slow sub-gigahertz carrier density pulsation (CDP) effects. For potential applications in microwave photonics, especially targeting the millimeter wave range, we propose that quantum dot devices might be used to realize an optically fed microwave phase shifter in the frequency range of 100GHz.

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KW - Slow light

KW - Cross gain modulation

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Enhancing slow- and fast-light effects in quantum dot semiconductor waveguides through ultrafast dynamics

Abstract

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Keywords

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