Contrast in transmission spectroscopy of a single quantum dot

B. D. Gerardot, S. Seidl, P. A. Dalgarno, R. J. Warburton, M. Kroner, K. Karrai, A. Badolato, P. M. Petroff

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)


The authors perform transmission spectroscopy on single quantum dots and examine the effects of a resident carrier's spin, the incident laser spot size, polarization, and power on the experimental contrast. They demonstrate a factor of 5 improvement in the maximum contrast by using a solid immersion lens to decrease the spot area. This increase yields a maximum signal to noise ratio of ~2000 Hz-12, which will allow for megahertz detection frequencies. The authors anticipate that this improvement will allow further investigation of spectral fluctuation and open up the feasibility for an all-optical readout of an electron spin in a quantum dot. © 2007 American Institute of Physics.

Original languageEnglish
Article number221106
Pages (from-to)-
Number of pages3
JournalApplied Physics Letters
Issue number22
Publication statusPublished - 28 May 2007


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