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Patar knight (talk | contribs) Adding local short description: "Device that switches or amplifies optical signals", overriding Wikidata description "device that switches or amplifies optical signals" |
Recently demonstrated optical transistor technology using ultrashort laser pulses has been added and appropriately cited. |
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* a dual-mirror optical cavity that holds around 20,000 [[cesium]] atoms trapped by means of optical tweezers and laser-cooled to a few [[microkelvin]]. The cesium ensemble did not interact with light and was thus transparent. The length of a round trip between the cavity mirrors equaled an integer multiple of the wavelength of the incident light source, allowing the cavity to transmit the source light. Photons from the gate light field entered the cavity from the side, where each photon interacted with an additional "control" light field, changing a single atom's state to be resonant with the cavity optical field, which changing the field's resonance wavelength and blocking transmission of the source field, thereby "switching" the "device". While the changed atom remains unidentified, [[quantum interference]] allows the gate photon to be retrieved from the cesium. A single gate photon could redirect a source field containing up to two photons before the retrieval of the gate photon was impeded, above the critical threshold for a positive gain.<ref>{{Cite journal | doi = 10.1126/science.1242905| pmid = 23950521| title = Triggering an Optical Transistor with One Photon| journal = Science| volume = 341| issue = 6147| pages = 725–6| year = 2013| last1 = Volz | first1 = J.| last2 = Rauschenbeutel | first2 = A.| bibcode = 2013Sci...341..725V| s2cid = 35684657}}</ref>
* in a concentrated water solution containing iodide anions<ref>{{Cite journal | doi = 10.1063/5.0130236| title = An ultra-fast liquid switch for terahertz radiation| journal = APL Photonics| volume = 7| issue = 121302| year = 2022| last1 = Buchmann | first1 = A.| last2 = Hoberg | first2 = C.| last3 = Novelli | first3 = F.| page = 121302| bibcode = 2022APLP....7l1302B| doi-access = free}}</ref>
* Modification of the dielectric material reflectivity to demonstrate attosecond "petahertz" optical switching.<ref>{{Cite journal |last=Hui |first=Dandan |last2=Alqattan |first2=Husain |last3=Zhang |first3=Simin |last4=Pervak |first4=Vladimir |last5=Chowdhury |first5=Enam |last6=Hassan |first6=Mohammed Th. |date=2023-02-22 |title=Ultrafast optical switching and data encoding on synthesized light fields |url=https://www.science.org/doi/full/10.1126/sciadv.adf1015 |journal=Science Advances |volume=9 |issue=8 |pages=eadf1015 |doi=10.1126/sciadv.adf1015 |pmc=9946343 |pmid=36812316}}</ref><ref>{{Cite patent|number=US20240219301A1|title=Optical switching and information coding on femtosecond or sub-femtosecond time scale|gdate=2024-07-04|invent1=Mohammed|invent2=HUI|invent3=ALQATTAN|inventor1-first=Mohammed Tharwat Hassan|inventor2-first=Dandan|inventor3-first=Husain|url=https://patents.google.com/patent/US20240219301A1/en}}</ref><ref>{{Cite journal |last=Hassan |first=Mohammed Th. |date=2024-02-21 |title=Lightwave Electronics: Attosecond Optical Switching |url=https://pubs.acs.org/doi/full/10.1021/acsphotonics.3c01584 |journal=ACS Photonics |volume=11 |issue=2 |pages=334–338 |doi=10.1021/acsphotonics.3c01584}}</ref>
* Demonstration the Petahertz Optical Transistor (POT) by light-induced quantum current generation in graphene transistor<ref>{{Cite journal |last=Sennary |first=Mohamed |last2=Shah |first2=Jalil |last3=Yuan |first3=Mingrui |last4=Mahjoub |first4=Ahmed |last5=Pervak |first5=Vladimir |last6=Golubev |first6=Nikolay V. |last7=Hassan |first7=Mohammed Th |date=2025-05-09 |title=Light-induced quantum tunnelling current in graphene |url=https://www.nature.com/articles/s41467-025-59675-5 |journal=Nature Communications |language=en |volume=16 |issue=1 |pages=4335 |doi=10.1038/s41467-025-59675-5 |issn=2041-1723}}</ref>
== See also ==
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