Self Referencing Heterodyne Transient Grating Spectroscopy with Short Wavelength

Photonics

卷:2

Mahesh G. Samant¹  Stuart S. P. Parkin¹  Jaewoo Jeong¹  Alexander X. Gray²  Hermann A. Dürr²  Markus Gühr³  Jakob Grilj³  Emily Sistrunk³ 

[1] IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA;

[2] SIMES, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, CA 94025, USA;

[3] Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd.,Menlo Park, CA 94025, USA;

关键词: transient grating;    heterodyne detection;    extreme ultraviolet;   

DOI  :  10.3390/photonics2020392

来源: DOAJ

【 摘 要 】

Heterodyning by a phase stable reference electric field is a well known technique to amplify weak nonlinear signals. For short wavelength, the generation of a reference field in front of the sample is challenging because of a lack of suitable beamsplitters. Here, we use a permanent grating which matches the line spacing of the transient grating for the creation of a phase stable reference field. The relative phase among the two can be changed by a relative translation of the permanent and transient gratings in direction orthogonal to the grating lines. We demonstrate the technique for a transient grating on a VO2 thin film and observe constructive as well as destructive interference signals.

【 授权许可】

Unknown