# Optical Effects Induced by Bloch Surface Waves in One-Dimensional Photonic Crystals
## 1 Introduction  
The Bloch surface waves (BSWs) in photonic crystals, despite their half-century history [1; 2], still cause stable interest among researchers. The BSWs were considered as an artificial analogue of surface plasmon-polaritons (SPPs) in metals. SPPs are commonly known surface waves that are widely used in optical sensing and as an element base for optoelectronics and integrated optics. Unfortunately, the SPP propagation is significantly restricted by Ohmic losses in metals in the visible spectral range [3]. The SPP dispersion law is determined by the metal type. This limits the SPP application in optical devices [4].  
In contrast, some properties allow the BSWs to be considered more suitable for applications for the visible and near-IR ranges. The all-dielectric structure of photonic crystals leads to low Ohmic losses, BSW propagation lengths up to millimeters [5] and high Q-factor of the BSW resonances. The dispersion law of the BSWs can be chosen in wide spectral range from UV to IR by changing the photonic crystal parameters [6; 7]. High sensitivity of the BSWs to boundary conditions provides the possibility to use them as bio- and gas sensors [8; 9; 10; 11; 12; 13]. Another promising area of application of the BSWs is the development of photonic devices for optoelectronic integrated circuits. One of the first attempts to control the propagation of the BSWs was the sinusoidal polymer grating at the surface of a photonic crystal that led to the formation of a photonic band gap and appearance of two opposite BSWs at the band gap edges [14; 15]. In [16], the possibility of polarization control of BSW propagation is demonstrated using two-dimensional diffraction grating. Furthermore, the possibility of the realization of a BSW that does not have a diffraction divergence is shown [17]. In several further works, the possibilities of BSW guiding using diffraction gratings of different geometries and visualization of the BSW by leakage radiation microscopy techniques are shown [18; 19; 20]. The prospect of the BSWs in photonic crystals for the development of flat optics elements was recently demonstrated in two-dimensional lens [21] and planar triangles [7].  
At the same time, a significant number of researchers who pursued BSW studies were limited to consider the optical properties of BSWs, such as the mean free path and the direction of propagation,the problems of coupling, the control of the dispersion law, and so on. In this case, the influence of the BSW excitation and propagation in the structure on other optical effects observed in the same structure is often overlooked. Meanwhile, the consideration of such interactions allows us to take a broader look at the practical prospects of studying BSWs in photonic crystals and to propose new areas for the use of BSWs, for example, as spatial modulators of light, wave plates, micromechanical devices and so on. This paper reviews the experimental studies of optical and magneto-optical effects in one-dimensional photonic crystals in the presence of BSWs performed in our group, and intends to demonstrate the prospects for the use of BSWs in new types of devices that are not usually associated with BSWs.