Rapid prototyping of grating magneto-optical traps using a focused ion beam.
Opt Express
; 29(23): 37733-37746, 2021 Nov 08.
Article
em En
| MEDLINE
| ID: mdl-34808840
ABSTRACT
We have developed a rapid prototyping approach for creating custom grating magneto-optical traps using a dual-beam system combining a focused ion beam and a scanning electron microscope. With this approach we have created both one- and two-dimensional gratings of up to 400 µm × 400 µm in size with structure features down to 100 nm, periods of 620 nm, adjustable aspect ratios (ridge width depth â¼ 1 0.3 to 1 1.4) and sidewall angles up to 71°. The depth and period of these gratings make them suitable for holographic trapping and cooling of neutral ytterbium on the 1S0 â 1P1 399 nm transition. Optical testing of the gratings at this wavelength has demonstrated a total first order diffraction of 90% of the reflected light. This work therefore represents a fast, high resolution, programmable and maskless alternative to current photo and electron beam lithography-based procedures and provides a time efficient process for prototyping of small period, high aspect ratio grating magneto-optical traps and other high resolution structures.
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Coleções:
01-internacional
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MEDLINE
Idioma:
En
Revista:
Opt Express
Ano de publicação:
2021
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Article