fem·​to·​sec·​ond | \ ˈfem(p)-tə-ˌse-kənd How to pronounce femtosecond (audio) , -kənt, -tō- \

Definition of femtosecond

: one quadrillionth of a second

Examples of femtosecond in a Sentence

Recent Examples on the Web The medium in question is a block of high-purity glass, which has voxels etched into it with femtosecond lasers. Jim Salter, Ars Technica, "Microsoft’s Project Silica offers robust thousand-year storage," 7 Nov. 2019 In fact, the pulse goes from being 20fs in duration to 0.1fs (a femtosecond is 10-15s). Chris Lee, Ars Technica, "Trampoline mirror may push laser pulse through fabric of the Universe," 14 Sep. 2019 Tuned to pick up near-infrared light and completing a scan in a few femtoseconds (10–15 seconds), the loop would see the vacuum glowing like a gas at room temperature. Quanta Magazine, "Quantum Weirdness Now a Matter of Time," 19 Jan. 2016 This requires that all possible states of the traveling particle be superposed in a single, coherent quantum state for tens of femtoseconds. Peter Byrne, Quanta Magazine, "In Pursuit of Quantum Biology With Birgitta Whaley," 30 July 2013 The Non-Lethal Laser-Induced Plasma Effect (NL-LIPE) system can be used to manipulate air molecules, creating a ball of plasma that oscillates to create sound waves with a stream of femtosecond-long laser bursts. Sean Gallagher, Ars Technica, "Non-Lethal Weapon: DOD seeks to use lasers to create shouting will-o-the-wisp," 22 Mar. 2018 Ytterbium is highly stable, so ytterbium atomic clocks are accurate past the nanosecond scale, all the way to the picosecond and femtosecond scale (1/1,000,000,000,000,000th of a second). Avery Thompson, Popular Mechanics, "Here Is the World's Most Stable Atomic Clock," 28 Nov. 2016 Measuring them requires equipment capable of discriminating between femtoseconds. The Economist, "Submarine cables could be repurposed as earthquake detectors," 16 June 2018 Within 30 femtoseconds – millionths of a billionth of a second – the molecule lost more than 50 electrons, far more than expected. Fox News, "Scientists create 'molecular black hole' in laboratory using world's most powerful x-ray beam," 5 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'femtosecond.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of femtosecond

1976, in the meaning defined above

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The first known use of femtosecond was in 1976

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Cite this Entry

“Femtosecond.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/femtosecond. Accessed 23 Feb. 2020.

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