A natural diamond surface was nanopatterned in a subablative scanning mode by multiple tightly focused 515-nm, 300-fs laser pulses, resulting in regular surface metagratings (nanoripples) with a subwavelength period of Λ ∼ 100 nm, an almost undistorted crystalline structure, free from sp2-carbon, oriented perpendicular to the laser polarization, and stackable both along and normal to their stripes. In the visible-near-IR ranges (400–800 nm), these metagratings demonstrate the pronounced resonant antireflective effect in the wavelength range near ∼4Λ, while the overall specular reflectance/transmittance is considerably diminished with respect to both the simulation results and the reference diamond surface, indicating strong (∼50%) coupling/scattering of light inside the crystal. Our modeling indicates the laser wavelength-dependent plasmon-based tunability of metagrating periods, implying the corresponding tunability of their spectral response.
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12 August 2019
Research Article|
August 12 2019
Direct femtosecond-laser writing of optical-range nanoscale metagratings/metacouplers on diamond surfaces
S. I. Kudryashov
;
S. I. Kudryashov
a)
1
Lebedev Physical Institute
, 119991 Moscow, Russia
2
Department of Semiconductor Quantum Electronics, National Nuclear Research University MEPhI
, 115409 Moscow, Russia
a)Author to whom correspondence should be addressed: kudryashovsi@lebedev.ru
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A. O. Levchenko;
A. O. Levchenko
1
Lebedev Physical Institute
, 119991 Moscow, Russia
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P. A. Danilov;
P. A. Danilov
1
Lebedev Physical Institute
, 119991 Moscow, Russia
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N. A. Smirnov;
N. A. Smirnov
1
Lebedev Physical Institute
, 119991 Moscow, Russia
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A. A. Rudenko
;
A. A. Rudenko
1
Lebedev Physical Institute
, 119991 Moscow, Russia
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N. N. Melnik;
N. N. Melnik
1
Lebedev Physical Institute
, 119991 Moscow, Russia
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N. I. Busleev
;
N. I. Busleev
1
Lebedev Physical Institute
, 119991 Moscow, Russia
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A. A. Ionin
A. A. Ionin
1
Lebedev Physical Institute
, 119991 Moscow, Russia
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a)Author to whom correspondence should be addressed: kudryashovsi@lebedev.ru
Appl. Phys. Lett. 115, 073102 (2019)
Article history
Received:
June 10 2019
Accepted:
July 26 2019
Citation
S. I. Kudryashov, A. O. Levchenko, P. A. Danilov, N. A. Smirnov, A. A. Rudenko, N. N. Melnik, N. I. Busleev, A. A. Ionin; Direct femtosecond-laser writing of optical-range nanoscale metagratings/metacouplers on diamond surfaces. Appl. Phys. Lett. 12 August 2019; 115 (7): 073102. https://doi.org/10.1063/1.5114630
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