M. Häyrinen

University of Eastern Finland

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M. Roussey

University of Eastern Finland

Markku Kuittinen

University of Eastern Finland

Babak Vosoughi Lahijani

Technical University of Denmark

Hans Peter Herzig

École Polytechnique Fédérale de Lausanne

Richa Dubey

Indian Institute of Technology Jodhpur

Abdoulaye Ndao

Boston University

Venancio Calero Vila

Franche-Comté Électronique Mécanique Thermique et Optique - Sciences et Technologies

M.-S. Kim

Hanna‐Riikka Teppo

University of Oulu

Alexis Caspar

Franche-Comté Électronique Mécanique Thermique et Optique - Sciences et Technologies

Cooperative Institutions

Franche-Comté Électronique Mécanique Thermique et Optique - Sciences et Technologies

Centre National de la Recherche Scientifique

Université Bourgogne Franche-Comté

University of Eastern Finland

University of Oulu

Université de franche-comté

Oulu University Hospital

Finland University

École Polytechnique Fédérale de Lausanne

University of Helsinki

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Guide d’onde electro-optique à haut facteur de forme sur LiNbO3 réalisée par scie circulaire de précision et atomic layer deposition

HAL (Le Centre pour la Communication Scientifique Directe) (2015)

Alexis Caspar Wentao Qiu Venancio Calero Vila Abdoulaye Ndao Gwenn Ulliac

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Correction: Häyrinen et al. The Transcription Factor Twist1 Has a Significant Role in Mycosis Fungoides (MF) Cell Biology: An RNA Sequencing Study of 40 MF Cases. Cancers 2023, 15, 1527

Cancers (2025)

M. Häyrinen Jenni Kiiskilä Annamari Ranki Liisa Väkevä Henry J Barton

In the original publication [...]

10.3390/cancers17010152

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Demonstration of Bloch Surface Waves in crystals with LiNbO3 thin films

Tatiana Kovalevich Abdoulaye Ndao Miguel Angel Suarez M.-S. Kim H.P. Herzig

A novel one dimensional photonic crystal (1DPHC) sustaining Bloch surface waves (BSWs) with a single crystal thin film lithium niobate (TFLN) as a part of a multilayer is theoretically and experimentally investigated. Properties of the dielectric multilayer platform with optical anisotropy introduced by X-cut TFLN are studied.

Crystal (programming language)

Optical materials

Bloch wave

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High aspect ratio electro-optic LiNbO3 ridge waveguides made by precise dicing and atomic layer deposition

HAL (Le Centre pour la Communication Scientifique Directe) (2015)

Alexis Caspar Wentao Qiu Venancio Calero Vila Abdoulaye Ndao Gwenn Ulliac

Deposition

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Near-field characterization of a Bloch-surface-wave-based 2D disk resonator

Optics Letters (2016)

Richa Dubey Babak Vosoughi Lahijani Elsie Barakat M. Häyrinen M. Roussey

We present, to the best of our knowledge, the first experimental investigation of a two-dimensional disk resonator on a dielectric multilayer platform sustaining Bloch surface waves. The disk resonator has been patterned into a few tens of nanometer thin (∼λ/25) titanium dioxide layer deposited on the top of the platform. We characterize the disk resonator by multi-heterodyne scanning near-field optical microscopy. The low loss characteristics of Bloch surface waves allowed us to reach a measured quality factor of 2×103 for a disk radius of 100 μm.

Optical disc

Q factor

10.1364/ol.41.004867

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Citations (51)

Subwavelength focusing of all-dielectric surface waves

arXiv (Cornell University) (2017)

M.-S. Kim Babak Vosoughi Lahijani Nicolas Descharmes Jakob Straubel Fernando Negredo

Micro-sized spheres can focus light into subwavelength spatial domains: a phenomena called photonic nanojet. Even though well studied in three-dimensional (3D) configurations, only a few attempts have been reported to observe similar phenomena in two-dimensional (2D) systems. This, however, is important to take advantage of photonic nanojets in integrated optical systems. Usually, surface plasmon polaritons are suggested for this purpose, but they suffer notoriously from the rather low propagation lengths due to intrinsic absorption. Here, we solve this problem and explore, theoretically, numerically, and experimentally, the use of Bloch surface waves sustained by a suitably structured all-dielectric media to enable subwavelength focusing in an integrated planar optical system. Since only a low index contrast can be achieved while relying on Bloch surface waves, we perceive a new functional element that allows a tight focusing and the observation of a photonic nanojet on top of the surface. We experimentally demonstrate a spot size of 0.66{\lambda} in the effective medium. Our approach paves the way to 2D all-dielectric photonic chips for nano-particle manipulation in fluidic devices and sensing applications.

Nanophotonics

10.48550/arxiv.1703.10809

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Twist and Zeb1 expression identify mycosis fungoides patients with low risk of disease progression

Journal of the European Academy of Dermatology and Venereology (2019)

M. Häyrinen Pyry M. Uotila Helka Sahi Kirsi‐Maria Haapasaari Hanna‐Riikka Teppo

Venereology

Translational Research

10.1111/jdv.16009

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Citations (3)

Low-loss titanium-dioxide strip waveguides by atomic layer deposition

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2014)

M. Roussey M. Häyrinen Antti Säynätjoki Vishal Gandhi Lasse Karvonen

In this paper we describe an approach to reduce the propagation loss in titanium dioxide strip waveguides.We achieved to reduce losses down to 2.4 dB/cm in 1 µm-wide waveguide at λ=1550 nm.

Titanium Dioxide

Waveguide

Deposition

10.1117/12.2038912

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Near-field investigation of Bloch surface wave based 2D optical components

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2017)

Richa Dubey Babak Vosoughi Lahijani Myun‐Sik Kim Elsie Barakat M. Häyrinen

We study the Bloch surface wave based nano-thin 2D optical components. The 2D elements are fabricated on the dielectric multilayer platform which sustains the Bloch surface waves. Such a platform is considered as a novel foundation for planar integrated optics. We exploit the total internal reflection configuration to achieve the phase matching condition for BSW excitation. Because of the evanescent behavior of the BSW, we use a scanning near field optical microscope to characterize the near-field properties of in-plane components. The 2D optical components include Disk resonators and Bessel-like beams.

Optical materials

10.1117/12.2250394

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Ultra-thin Bloch-surface-wave-based reflector at telecommunication wavelength

Photonics Research (2017)

Richa Dubey Babak Vosoughi Lahijani M. Häyrinen M. Roussey Markku Kuittinen

We experimentally demonstrate the optical properties of gratings engraved in a single-mode waveguide fabricated on top of a dielectric multilayer platform. The structure can be approached as a reflector for Bloch-surface-wave-based two-dimensional optical systems. The gratings have been fabricated on a thin (∼λ/25) titanium dioxide layer with a thickness of a few tens of nanometers deposited on the top of a multilayer platform. The optical properties of the gratings have been characterized in the near field with the aid of multi-heterodyne scanning near-field optical microscopy. We investigate the surface wave’s interference pattern, produced by incident and reflected light in front of the gratings. The presented gratings behave as an efficient Bloch-surface–wave-based reflector at telecommunication wavelength.

Reflector (photography)

Nanophotonics

10.1364/prj.5.000494

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Citations (26)