Coherent spectroscopy in potassium vapor with amplitude modulated light
Anno: 2008
Autori: Gozzini S., Cartaleva S., Slavov D.G., Marmugi L., Lucchesini A.
Affiliazione autori: IPCF – CNR;
Institute of Electronics, BAS, Sofia, Bulgaria;
Physics Dept., University of Pisa, Italy
Abstract: We present the first experimental observation of Coherent Population Trapping (CPT) in Potassium, obtained with kHz-frequency modulation of the laser light amplitude. It is performed by acousto-optical amplitude modulation of the radiation from an external cavity diode laser, matching the D(1) line of K. The CPT resonances are detected both through K absorption and fluorescence. The resonances are studied in three kinds of K cells: i) pure-evacuated, ii) polydimethylsiloxane (PDMS)-coated-evacuated and iii) Ne-gas buffered. In all cases CPT-resonance narrowing with cell temperature is observed.. In the pure-evacuated cell we registered the lowest contrast and the highest width of the resonance, while in buffered/coated cells a strong enhancement of the CPT resonance contrast up to 15% is observed. This behavior is the opposite to the one exhibited by Cs and Rb. The observed contrast enhancement in K is accompanied by more than two orders of magnitude reduction of the resonance width. The results here presented prove the advantage of using Potassium in CPT-based applications.
Giornale/Rivista: PROCEEDINGS OF SPIE
Volume: 7027 Da Pagina: 70270K A: 70270K
Maggiori informazioni: ISBN: 978-0-8194-7241-0Parole chiavi: coherent population trapping; electromagnetic induced transparency; magnetometry; spectroscopy; laser diodeDOI: 10.1117/12.822458Citazioni: 2dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-28Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui