Broadband second harmonic generation in one-dimensional randomized nonlinear photonic crystal

Sheng, Yan; Ma, Da; Ren, Ming; Chai, Wenqiang; Li, Zhiyuan; Koynov, Kaloian; Królikowski, Wiesław

doi:10.1063/1.3614558

Cited by 22 publications

(21 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

mentioning

confidence: 99%

“…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%

See 1 more Smart Citation

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

et al. 2014

Self Cite

View full text Add to dashboard Cite

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 ...

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

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

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…With the development of domain engineering applications, ferroelectric domain structure with micron or sub-micron linewidth is desired [11][12][13][14]. Here we develop a method to fabricate arbitrary ferroelectric domain patterns on LN film (30-50μm thick) by applying a structured external field at room temperature [15][16].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Pattern Poled Lithium Niobate Film and its Nonlinear Optical Applications

Wang

Chen

et al. 2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Abstract.We develop an approach to fabricate arbitrary ferroelectric domain patterns on lithium niobate film (30-50 μm thick) by applying a structured external field at room temperature. The fabricating method can be operated easily to reach 1 μm linewidth resolution. The ferroelectric domain inversion is stable and uniform. Nonlinear diffraction is generated when the fundamental wave pumps to film. Various nonlinear wavefronts are obtained such as the frequency converted optical vortex beam. A nonlinear holographic concept is proposed to explain the physical phenomena and guide the corresponding domain design. The applications in optical field manipulation and novel photonic states generation are discussed. IntroductionLithium niobate (LN), a typical optoelectronic material, has been widely used in integrated optics due to its excellent nonlinear, electro-optic and acousto-optic properties [1][2][3][4]. Recently, the ferroelectric domain engineering on LN have attracted much attention because of the demand to realize nonlinear wave mixing process, including collinear and noncollinear situations in quasi-phase-matching (QPM) manners [5][6][7][8][9]. While it is difficult to carry out uniform micron linewidth ferroelectric domain inversion on typical 500-μm-thick LN crystal (the coercive field is about 21 kV/mm.) at room temperature as the result of the domain growth from +c facet to -c facet. At the same time, the domain structures will deteriorate soon for submicron LN film (540 nm thick) [10].With the development of domain engineering applications, ferroelectric domain structure with micron or sub-micron linewidth is desired [11][12][13][14]. Here we develop a method to fabricate arbitrary ferroelectric domain patterns on LN film (30-50μm thick) by applying a structured external field at room temperature [15][16]. The ferroelectric domain inversion is stable and uniform with 1 μm linewidth resolution.Based on the pattern poled LN film, it is convenient to observe nonlinear diffraction of vortex beam following the nonlinear holographic principle [8,17]. Furthermore, we can effectively tailor nonlinear wavefronts with designed ferroelectric domain through computer-generation holograms (CGH) [18][19][20]. Also, suitable domain structure could be flexibly introduced into LN for spontaneous parametric downconversion [21].

show abstract

“…Nonlinear frequency conversion, polarization rotation, and macro-phonon polariton excitation have been previously demonstrated in periodically poled LN (PPLN). [4][5][6][7] Additionally, the combination of EO and nonlinear effects was utilized to predict polarization insensitive optical parametric amplification in a four section PPLN, 8 which may have promising engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Tunable dual-wavelength filter and its group delay dispersion in domain-engineered lithium niobate

et al. 2016

View full text Add to dashboard Cite

A tunable dual-wavelength filter is experimentally demonstrated in domain-engineered lithium niobate. Application of an electric field on the y-surfaces of the sample results in the optical axes rotating clockwise and anticlockwise, which makes selective polarization rotation. The quasi phase-matching wavelengths could be adjusted through suitable domain design. A unique dual valley spectrum is obtained in a periodically poled lithium niobate structure with a central defect if the sample is placed between two parallel polarizers. The expected bandwidth could be varied from ∼1 nm to ∼40 nm. Moreover, both the spectral response and group delay dispersion could be engineered.

show abstract

Broadband second harmonic generation in one-dimensional randomized nonlinear photonic crystal

Abstract: We study experimentally second harmonic generation in a one-dimensional nonlinear photonic crystal with randomized inverted-domain structure. We show that the randomness enables one to realize an efficient broadband emission of high-quality second harmonic beam. V

Cited by 22 publications

References 15 publications

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

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

Fabrication of Pattern Poled Lithium Niobate Film and its Nonlinear Optical Applications

Tunable dual-wavelength filter and its group delay dispersion in domain-engineered lithium niobate

Contact Info

Product

Resources

About