Domain-shape-based modulation of Čerenkov second-harmonic generation in multidomain strontium barium niobate

Ayoub, Mousa; Roedig, Philip; Imbrock, Jörg; Denz, Cornélia

doi:10.1364/ol.36.004371

Cited by 22 publications

(18 citation statements)

References 17 publications

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“…However,Čerenkov-type second-harmonic generation can also be observed in an extreme case where a single boundary between two inversely oriented ferroelectric domains is illuminated [19,20]. In a two-dimensional nonlinear photonic structure (NPS)Čerenkov-type second-harmonic radiation is typically emitted on a cone, which is azimuthally modulated due to the individual form and size of the ferroelectric domains [21,22] and the polarization properties of the effective nonlinear coefficient [15]. Moreover, additional modulations can also be found onČerenkov higher-harmonic cones due to the cascaded nature of the generation process [23].…”

Section: Introductionmentioning

confidence: 99%

Čerenkov-type second-harmonic spectroscopy in random nonlinear photonic structures

Ayoub¹,

Roedig²,

Koynov³

et al. 2013

Opt. Express

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We report on experimental and theoretical studies of Čerenkov-type second-harmonic generation in random nonlinear photonic structures with different two-dimensional distributions of the ferroelectric domains. We utilize Čerenkov-type second-harmonic generation spectroscopy to estimate the average ferroelectric domain size by analyzing the spatial Fourier spectrum of the domain patterns. This is measured by scanning the Čerenkov second-harmonic signal for different angles of incidence and light polarizations of the fundamental wave. By comparing the experimental results with numerically simulated Fourier spectra, the corresponding domain patterns are retrieved, which are in a good correspondence with images obtained by Čerenkov-type second-harmonic generation microscopy.

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Section: Introductionmentioning

confidence: 99%

Čerenkov-type second-harmonic spectroscopy in random nonlinear photonic structures

Ayoub¹,

Roedig²,

Koynov³

et al. 2013

Opt. Express

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“…Thus, a pool of reciprocal lattice vectors with random orientations and random magnitudes is created to phase match nonlinear interactions over a broad spectrum of wavelengths. Such a technique is known as random quasi-phase matching (QPM) [3][4][5].A good case in point is strontium barium niobate (Sr x Ba 1−x Nb 2 O 6 , SBN) crystal, which has been commonly used for broadband second harmonic generation (SHG) [6], cascaded third harmonic generation [7,8], and even Čerenkov-type nonlinear interactions [9][10][11]. However, the phase transition temperature (Curie temperature, T c ) of the SBN crystal is low [12], which is a main drawback for laser applications.…”

mentioning

confidence: 99%

“…A good case in point is strontium barium niobate (Sr x Ba 1−x Nb 2 O 6 , SBN) crystal, which has been commonly used for broadband second harmonic generation (SHG) [6], cascaded third harmonic generation [7,8], and even Čerenkov-type nonlinear interactions [9][10][11]. However, the phase transition temperature (Curie temperature, T c ) of the SBN crystal is low [12], which is a main drawback for laser applications.…”

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confidence: 99%

Calcium barium niobate as a functional material for broadband optical frequency conversion

et al. 2014

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We demonstrate the application of as-grown calcium barium niobate (CBN) crystal with random-sized ferroelectric domains as a broadband frequency converter. The frequency conversion process is similar to broadband harmonic generation in commonly used strontium barium niobate (SBN) crystal, but results in higher conversion efficiency reflecting a larger effective nonlinear coefficient of the CBN crystal. We also analyzed the polarization properties of the emitted radiation and determined the ratio of d 32 and d 33 components of the second-order susceptibility tensor of the CBN crystal.Ferroelectric crystal has been exploited in a wide range of devices since its discovery in the 1920s [1]. These devices include filters for wireless communications, modulators in optical circuits, and optical frequency converters in laser technology. Most of these functions are based on 180°antiparallel ferroelectric domains and the ability to engineer these domains on the micro or submicroscale [2]. Of the many ferroelectrics, those asgrown with random-sized ferroelectric domains form a unique group. As far as application in nonlinear optics is concerned, the random domain pattern results in a spatially random modulation of the quadratic nonlinearity of the material. Thus, a pool of reciprocal lattice vectors with random orientations and random magnitudes is created to phase match nonlinear interactions over a broad spectrum of wavelengths. Such a technique is known as random quasi-phase matching (QPM) [3][4][5].A good case in point is strontium barium niobate (Sr x Ba 1−x Nb 2 O 6 , SBN) crystal, which has been commonly used for broadband second harmonic generation (SHG) [6], cascaded third harmonic generation [7,8], and even Čerenkov-type nonlinear interactions [9][10][11]. However, the phase transition temperature (Curie temperature, T c ) of the SBN crystal is low [12], which is a main drawback for laser applications. At high pump power, the crystal will undergo a transition to the paraelectric state, and consequently, the quadratic nonlinear optical effects will disappear [13]. Compared with SBN, calcium barium-niobated (Ca x Ba 1−x Nb 2 O 6 , CBN) crystal is more suitable for practical optical devices operating at higher pump powers because of its higher phase transition temperature. For example, the CBN crystal exhibits a transition temperature of about 539 K for the congruently melting composition with 28 mol. % of calcium (x 0.28, CBN-28) [14,15], but the SBN crystal shows a lower transition temperature of about 353 K for the congruently melting composition with 61 mol. % of strontium content (x 0.61, SBN-61) [16,17]. Recently, Čerenkov-type SHG has been demonstrated in the CBN-28 crystal, which can be used as a nonlinear prism [18][19][20].In this Letter, we show that the CBN crystal is superior over the traditional SBN crystal in terms of the frequency mixing process, which leads to a higher conversion efficiency. We demonstrate experimentally that the broadband SHG process in the CBN crystal is three to four times higher ...

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“…Čerenkov second-harmonic generation (ČSHG) in nonlinear photonic crystals (NLPCs) with spatially modulated quadratic nonlinearity χ 2 has attracted much attention recently [1][2][3][4]. From a fundamental point of view, the appearance of ČSHG is a result of light-matter interaction satisfying only the longitudinal (i.e., along propagation direction) phase-matching condition [5] [see Fig.…”

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confidence: 99%

Enhanced Čerenkov second-harmonic emission in nonlinear photonic structures

et al. 2012

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We study experimentally and theoretically the Čerenkov-type second-harmonic generation in a one-dimensional nonlinear photonic crystal. We demonstrate that the power of emitted second-harmonic can be enhanced 270 times by varying the angle of incidence of the fundamental beam such that the reciprocal lattice vector of the crystal can be used to compensate for the phase mismatch in the transverse direction enabling interaction in the nonlinear Bragg diffraction regime.

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Domain-shape-based modulation of Čerenkov second-harmonic generation in multidomain strontium barium niobate

Cited by 22 publications

References 17 publications

Čerenkov-type second-harmonic spectroscopy in random nonlinear photonic structures

Čerenkov-type second-harmonic spectroscopy in random nonlinear photonic structures

Calcium barium niobate as a functional material for broadband optical frequency conversion

Enhanced Čerenkov second-harmonic emission in nonlinear photonic structures

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