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OPTICS LETTERS, vol. 33, no. 1, page. 74 - 76, 2008-01-01
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OPTICS LETTERS, vol. 45, no. 24, page. 6755 - 6758, 2020-12
OPTICS LETTERS, vol. 42, no. 9, page. 1760 - 1763, 2017-05