Research Activities

PNJ generated by microfabricated dielectric cylinders using PBW


K. Kosumsupamala, K. Tobe , A. Tsuji, D. Seya, H. Seki, N. Puttaraksa, T. Matsui and H. Nishikawa, "Photonic nanojets generated by microfabricated dielectric cylinders using proton beam writing", Appl. Phys. Lett. 123(14), 141102 (2023).

Featured online on AIP Publishing showcase in Kudos

Reflection-less frequency-selective microwave metamaterial absorber

T. Matsui, S. Taniguchi, K. Yoshida, and H. Murata, "Reflection-less frequency-selective microwave metamaterial absorber", OSA Continuum 4(8), pp. 2351-2363 (2021).

Index-tunable THz active metamaterials


Y. Watanabe & T. Matsui, “Index-tunable terahertz metamaterials based on double-layered closed-ring resonator arrays”, J. of Photonics for Energy, 8(3), 032211 (2018).

Efficient optical modulation of THz transmission


T. Matsui et al., , “Mechanism of Optical Terahertz-Transmission Modulation in Organic/Inorganic Semiconductor Interface and Its Application to Active Metamaterials”, Opt. Lett. 38, pp.4632-4635 (2013).

T. Matsui et al., “Efficient optical terahertz-transmission modulation in solution-processable organic semiconductor thin films on silicon substrate”, Jpn. J. Appl. Phys. 55, 3S2, pp.03DC12-1-4 (2016).

collaboration with ILE, Osaka Univ.

Freestanding Polymer SRRs


PIC-FDTD analysis of e-beam-induced THz radiation



A. Okajima & T. Matsui, “Electron-beam induced terahertz radiation from graded metallic grating”, Opt. Express 22, pp.17490-17496 (2014).

T. Matsui, "A Brief Review on Metamaterial-Based Vacuum Electronics for Terahertz and Microwave Science and Technology", J. Infrared Milli Terahz Waves 38, pp.1140-1161 (2017). 

Direct imaging of tunable PNJs from a self-assembled LC microdroplet

Construction of cost-efficient LSCM system

T. Matsui and K. Tsukuda, "Direct imaging of tunable photonic nanojets from a self-assembled liquid crystal microdroplet", Opt. Lett. 42(22), pp. 4663-4666 (2017).

Featured online on Advances in Engineering

DSWs in NDLC metamaterials


T. Matsui, “Dyakonov surface waves in nanoparticle-dispersed liquid crystal metamaterials”, Appl. Phys. Express 8, pp.072601-1-4 (2015).

tunable microwave & THz metamaterials utilizing pi-conjugated polymer actuators


T. Matsui et al., , “Electroactive Tuning of Double-Layered Metamaterials Based on π-Conjugated Polymer Actuators”, Adv. Opt. Mater. 4, pp.135-140 (2016).

collaboration with NLPC, ANU

EIT analogue in magnetoelastic metamaterials


T. Matsui et al., “Electromagnetic tuning of resonant transmission in magnetoelastic metamaterials”, Appl. Phys. Lett. 104, pp.161117-1-4 (2014).

collaboration with NLPC, ANU

ADE-FDTD analysis of lasing dynamics in CLC


T. Matsui & M. Kitaguchi, “Finite-Difference Time-Domain Analysis of Laser Action in Cholesteric Photonic Liquid Crystal”, Appl. Phys. Express 3, pp.061701-1-3 (2010).

松井龍之介 「コレステリック液晶レーザーの数値シミュレーション ーレージング・ダイナミクスのADE-FDTD解析 ー」，液晶, 16, pp.16-23 (2012). 

THz EOT in aperiodic hole array


T. Matsui et al., “Transmission resonances through aperiodic arrays of subwavelength apertures”, Nature 446, pp.517-521, (2007).

A. Agrawal et al., “Terahertz transmission properties of quasiperiodic and aperiodic aperture arrays”, J. Opt. Soc. Am. B 24, pp.2545-2555 (2007).

A. Agrawal et al., “Aperiodic Aperture Arrays as Terahertz Plasmonic Metamaterials”, SPIE Newsroom (2007).

THz EOT in heavily-doped pi-conjugated polymer film perforated with a periodic hole array


T. Matsui et al., “Resonantly enhanced transmission through a periodic array of subwavelength apertures in heavily doped conducting polymer films”, Appl. Phys. Lett. 88, p.071101-1-3, (2006).

Z. V. Vardeny et al., “Tunable plasmonic crystals of heavily-doped conducting polymers promise novel devices”, SPIE Newsroom (2006)

Lasing in photopolymerized CLC film


T. Matsui et al., “Flexible mirroless laser based on a free-standing film of photopolymerized cholesteric liquid crystal”, Appl. Phys. Lett. 81, pp.3741-3743 (2002).