Measuring the frequency response of optically pumped metal-clad nanolasers

We report on our initial attempt to characterize the intrinsic frequency response of metal-clad nanolasers. The probed nanolaser is optically biased and modulated, allowing the emitted signal to be detected using a high-speed photodiode at each modulation frequency. Based on this technique, the pros...

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Bibliographic Details
Published in:Optics express 2019-07, Vol.27 (15), p.21834-21842
Main Authors: Xu, Chi, Hayenga, William E, Khajavikhan, Mercedeh, Likamwa, Patrick
Format: Article
Language:English
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Summary:We report on our initial attempt to characterize the intrinsic frequency response of metal-clad nanolasers. The probed nanolaser is optically biased and modulated, allowing the emitted signal to be detected using a high-speed photodiode at each modulation frequency. Based on this technique, the prospect of high-speed operation of nanolasers is evaluated by measuring the D-factor, which is the ratio of the resonance frequency to the square root of its output power(f /Pout1/2). Our measurements show that for nanolasers, this factor is an order of magnitude greater than that of other state-of-the-art directly modulated semiconductor lasers. The theoretical analysis, based on the rate equation model and finite element method simulations of the cavity is in full agreement with the measurement results.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.27.021834