Whispering-gallery modes and light emission from a Si-nanocrystal-based single microdisk resonator

Optics Express
M GhulinyanL Pavesi

Abstract

We report on visible light emission from Si-nanocrystal based optically active microdisk resonators. The room temperature photoluminescence (PL) from single microdisks shows the characteristic modal structure of whispering-gallery modes. The emission is both TE and TM-polarized in 300 nm thick microdisks, while thinner ones (135 nm) support only TE-like modes. Thinner disks have the advantage to filter out higher order radial mode families, allowing for measuring only the most intense first order modal structure. We reveal subnanometer linewidths and corresponding quality factors as high as 2800, limited by the spectral resolution of the experimental setup. Moreover, we observe a modification of mode linewidth by a factor 13 as a function of pump power. The origin of this effect is attributed to an excited carrier absorption loss mechanism.

References

Dec 2, 2000·Nature·L PavesiF Priolo
Aug 15, 2003·Nature·Kerry J Vahala
Jan 7, 2005·Nature·Haisheng RongMario Paniccia
May 20, 2005·Nature·Qianfan XuMichal Lipson

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Citations

Aug 21, 2020·Advanced Materials·Kang LiuJiaqi Zhu
Apr 7, 2010·Optics Letters·Brandon ReddingDennis W Prather
Apr 19, 2011·Optics Letters·Federico Ferrarese LupiBlas Garrido
May 26, 2009·Optics Express·Mher GhulinyanLorenzo Pavesi
Apr 27, 2010·ACS Nano·Daniel J GargasPeidong Yang

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