Optical pumping and readout of bismuth hyperfine states in silicon for atomic clock applications.

Abstract:

:The push for a semiconductor-based quantum information technology has renewed interest in the spin states and optical transitions of shallow donors in silicon, including the donor bound exciton transitions in the near-infrared and the Rydberg, or hydrogenic, transitions in the mid-infrared. The deepest group V donor in silicon, bismuth, has a large zero-field ground state hyperfine splitting, comparable to that of rubidium, upon which the now-ubiquitous rubidium atomic clock time standard is based. Here we show that the ground state hyperfine populations of bismuth can be read out using the mid-infrared Rydberg transitions, analogous to the optical readout of the rubidium ground state populations upon which rubidium clock technology is based. We further use these transitions to demonstrate strong population pumping by resonant excitation of the bound exciton transitions, suggesting several possible approaches to a solid-state atomic clock using bismuth in silicon, or eventually in enriched (28)Si.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Saeedi K,Szech M,Dluhy P,Salvail JZ,Morse KJ,Riemann H,Abrosimov NV,Nötzel N,Litvinenko KL,Murdin BN,Thewalt ML

doi

10.1038/srep10493

subject

Has Abstract

pub_date

2015-05-20 00:00:00

pages

10493

issn

2045-2322

pii

srep10493

journal_volume

5

pub_type

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