| Autor: |
Schwartz, O, Axelrod, JJ, Tuthill, DR, Haslinger, P, Ophus, C, Glaeser, RM, Müller, H |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Schwartz, O; Axelrod, JJ; Tuthill, DR; Haslinger, P; Ophus, C; Glaeser, RM; et al.(2017). Near-concentric Fabry-P rot cavity for continuous-wave laser control of electron waves. Optics Express, 25(13), 14453-14462. doi: 10.1364/OE.25.014453. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/6fx8r37g |
| DOI: |
10.1364/OE.25.014453. |
| Popis: |
© 2017 Optical Society of America. Abstract: Manipulating free-space electron wave functions with laser fields can bring about new electron-optical elements for transmission electron microscopy (TEM). In particular, a Zernike phase plate would enable high-contrast TEM imaging of soft matter, leading to new opportunities in structural biology and materials science. A Zernike phase plate can be implemented using a tight, intense continuous laser focus that shifts the phase of the electron wave by the ponderomotive potential. Here, we use a near-concentric cavity to focus 7.5 kW of continuous-wave circulating laser power at 1064 nm into a 7 µm mode waist, achieving a record continuous laser intensity of 40 GW/cm2. Such parameters are su cient to impart a phase shift of 1 rad to a 10 keV electron beam, or 0.16 rad to a 300 keV beam. Our numerical simulations confirm that the standing-wave phase shift profile imprinted on the electron wave by the intra-cavity field can serve as a nearly ideal Zernike phase plate. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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