Real-time terahertz digital holography with a quantum cascade laser
Autori: Locatelli M., Ravaro M., Bartalini S., Consolino L., Vitiello MS., Cicchi R., Pavone FS., De Natale P.
Affiliazione autori: INO-CNR, Istituto Nazionale di Ottica, Largo E. Fermi 6, Firenze, I-50125, Italy; LENS, European Laboratory for NonLinear Spectroscopy, Via N. Carrara 1, Sesto Fiorentino (Firenze), I-50019, Italy; NEST-CNR, Istituto Nanoscienze and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, I-56127, Italy; Dipartimento di Fisica e Astronomia, Università di Firenze, Via Sansone 1, Sesto Fiorentino (Firenze), I-50019, Italy
Abstract: Coherent imaging in the THz range promises to exploit the peculiar capabilities of these wavelengths to penetrate common materials like plastics, ceramics, paper or clothes with potential breakthroughs in non-destructive inspection and quality control, homeland security and biomedical applications. Up to now, however, THz coherent imaging has been limited by time-consuming raster scanning, point-like detection schemes and by the lack of adequate coherent sources. Here, we demonstrate real-time digital holography (DH) at THz frequencies exploiting the high spectral purity and the mW output power of a quantum cascade laser combined with the high sensitivity and resolution of a microbolometric array. We show that, in a one-shot exposure, phase and amplitude information of whole samples, either in reflection or in transmission, can be recorded. Furthermore, a 200 times reduced sensitivity to mechanical vibrations and a significantly enlarged field of view are observed, as compared to DH in the visible range. These properties of THz DH enable unprecedented holographic recording of real world dynamic scenes.
Giornale/Rivista: SCIENTIFIC REPORTS
Volume: 5 Da Pagina: 13566-1 A: 13566-7
Maggiori informazioni: This work was partly supported by the Italian Ministry of Education, University, and Research (MIUR) through the program \”FIRB-Futuro in Ricerca 2010\” RBFR10LULP Fundamental research on terahertz photonic devices\”.DOI: 10.1038/srep13566Citazioni: 51dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2021-04-11Riferimenti 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