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"This book deals with all aspects of plasmonics, basics, applications and advanced developments. Plasmonics is an emerging field of research dedicated to the resonant interaction of light with metals. The light/matter interaction is strongly enhanced at a nanometer scale which sparks a keen interest of a wide scientific community and offers promising applications in pharmacology, solar energy, nanocircuitry or also light sources. The major breakthroughs of this field of research originate from the recent advances in nanotechnology, imaging and numerical modelling. The book is divided into three main parts, extended surface plasmons polaritons propagating on metallic surfaces, surface plasmons localized on metallic particles, imaging and nanofabrication techniques. The reader will find in the book: Principles and recent advances of plasmonics, a complete description of the physics of surface plasmons, a historical survey with emphasize on the emblematic topic of Wood's anomaly, an overview of modern applications of molecular plasmonics and an extensive description of imaging and fabrications techniques."

"ABSTRAKStudi eksperimen terkini pada sistem oksida stronsium niobat telah mengungkap kemunculan plasmon inkonvensional yang diakibatkan kungkungan bidang-bidang oksigen. Sebuah model fenomenologis yang menyertai data eksperimen pada studi tersebut telah mengindikasikan bahwa elektron yang terkungkung berperilaku sebagaimana osilator harmonik. Hal-hal tersebut memotivasi kami untuk mempelajari lebih lanjut efek kungkungan spasial terhadap elektron dalam pembentukan plasmon inkonvensional pada sistem terbatas. Dinamika elektron terkorelasi pada sistem ini dijelaskan menggunakan model Hubbard 3D untuk ukuran terbatas yang diselesaikan melalui pendekatan medan rata-rata. Kami mempelajari sistem kubus hipotetis yang terdiri dari n × n × n atom berorbital tunggal dengan n adalah 3, 5, 7, dan 9. Kalkulasi dilakukan dengan dan tanpa memperhitungkan repulsi Coulomb on-site Kami juga mempertimbangkan sistem diperpanjang sebagai pembanding untuk mengetahui efek kungkungan. Perhitungan kami menunjukkan bahwa plasmon inkonvensional terbentuk hanya jika kita memperhitungkan efek kungkungan dan repulsi Coulomb on-site.

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ABSTRACTRecent experimental study on strontium niobate oxide system has revealed unconventional plasmons generation due to confinement by oxygen planes. A phenomenological model accompanied the experimental data on that study has suggested that the confined electrons behave as harmonic oscillators. These motivate us to further study the effect of space confinement to the electrons on the generation of the unconventional plasmons in a finite-size system. The dynamics of the correlated electrons in this confined system is described using the finite-size 3D Hubbard model that is solved within mean-field approximation. We study a hypothetical cubic systems that consist of n × n × n single-orbital atoms with n being 3, 5, 7, and 9. The calculation is done with and without incorporating the on-site Coulomb repulsion. We also consider extended system as a comparison to know the effect of confinement. Our calculations show that unconventional plasmons are observed only if we take into account both the confinement effect and the on-site Coulomb repulsion."

"This is a comprehensive survey of current trends and emerging hot topics in the field of plasmonics as well as closely related disciplines, summarizing recent progress in surface plasmon phenomena and applications."

"This book covers the fundamental developments of plasmonic nanosenor design over the last few years. Jan Becker addresses the relevant theoretical concepts and then applies these to discuss the properties and trends in nanoparticles of various shapes and sizes. The first discovery Jan makes in his PhD research is that there is an optimal shape for plasmonic nanoparticles used for sensing purposes. In further chapters he goes on to describe novel experimental methods to use plasmonic nanoparticles for molecular sensing. Many of the experiments described in this thesis."

"Penelitian pemodelan localized surface plasmon resonance LSPR paduan emas-perak wt dengan nilai x=0, 20, 40, 60, 80, dan 100 telah berhasil dilakukan menggunakan simulasi MNPBEM. Simulasi dilakukan pada satu nanorod model batang dengan variasi aspek rasio dan komposisi pada diameter D=20nm, D=40nm, D=60nm, dan D=80nm. Untuk mengamati fenomena LSPR, gelombang cahaya yang dalam hal ini medan listrik, diberikan pada dua arah yang berbeda, yaitu arah sejajar sumbu utama batang dan tegak lurus sumbu utama batang dengan jangkauan panjang gelombang 200nm-1200nm. Hasil simulasi menunjukkan ada dua puncak yang masing-masing dihasilkan dari dua polarisasi yang berbeda diseluruh aspek rasio yang berbeda, yaitu puncak dengan energi yang lebih rendah dihasilkan dari polarisasi medan listrik sejajar sumbu utama dan puncak dengan energi yang lebih tinggi dihasilkan dari polarisasi medan listrik tegak lurus sumbu utama. Ketika aspek rasio dan komposisi Ag semakin meningkat, mode eksitasi yang lebih tinggi dapat diamati seperti mode quadrupole dan hexapole. Kemudian, pada komposisi paduannya didapatkan dua puncak ketika medan listrik diberikan pada arah tegak lurus sumbu utama, dua puncak ini diduga kontribusi dari masing-masing unsur penyusunnya yang saling terkopel dengan interaksi yang lemah. Berdasarkan hasil penelitian ini, didapatkan informasi fenomena LSPR pada paduan Au/Ag yang berada didaerah cahaya tampak pada masing-masing diameter.

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We have perform modelling of LSPR alloy with x 0, 20, 40, 60, 80, and 100 within weight percent using MNPBEM Toolbox simulation. The simulation was taking by single nanorod varied aspec ratio and fraction of silver with diameter D 20nm, 40nm, 60nm, and 80nm, respectively. To investigated the LSPR phenomenon, the incident light in range 200nm 1200nm, especially in electric field, is given by two differ polarization, that is parallel and perpendicular principal axis of nanorod, respectively. The result show two peaks appear for given differ polarization in whole aspec ratio. One peak with higher and lower energy was produced by parallel and perpendicular polarization, respectively. Higher orders were observed, like quadrupole and hexapole when increasing aspec ratio and silver composition. Furthermore, there was two peaks appears in alloying system when incident light was given in perpendicular principal axis, its guessed contribution from gold and silver electron conduction rsquo s oscillation separately due to lack coupling between them. Based on this result, we can determine the threshold aspec ratio and silver composition with varying diameter, where the LSPR phenomenon exist in visible range."

"Infeksi virus dengue (DENV) masih menjadi salah satu penyakit yang sering terjadi di dunia dan tak jarang menimbulkan kematian. Diagnosis dini yang akurat diperlukan untuk memberikan pengobatan yang tepat. Karena Indonesia merupakan negara kepulauan, metode deteksi menggunakan PCR menjadi kurang efektif sehingga alat berbasis lateral flow assay (LFA) yang menggunakan antibodi monoklonal sebagai biosensor-nya dapat menjadi solusi. Pengembangan nanobodi yang berasal dari hewan Camelidae dapat mengatasi kelemahan antibodi monoklonal karena kelarutannya yang tinggi, stabilitas yang lebih baik, dan dapat dimanipulasi secara genetik. Dengan menggunakan nanobodi yang telah diproduksi sebelumnya oleh Asih et al. (2022) dalam E. coli yang dapat mendeteksi infeksi DENV, maka selanjutnya dilakukan evaluasi menggunakan metode surface plasmon resonance (SPR) untuk mendapatkan parameter kinetika pada interaksi antara nanobodi dengan protein NS1 sebagai biomarker infeksi DENV. Penelitian diawali dengan perbanyakan kultur E. coli, ekspresi nanobodi dengan induksi IPTG, pemurnian nanobodi, konfirmasi hasil perolehan nanobodi dengan SDS-PAGE dan Western Blot, lalu diakhiri dengan uji SPR. Secara umum, respon sinyal SPR menunjukkan bahwa nanobodi klon DD5 dan DD7 mampu berinteraksi dan berikatan dengan antigen NS1 DENV-2. Nilai KD yang diperoleh saat ligan DD5 berinteraksi dengan variasi konsentrasi NS1 DENV-2 adalah 1,08 x 10-7 M. Sementara itu, nilai KD yang diperoleh saat ligan NS1 berinteraksi dengan variasi konsentrasi DD5 dan DD7 secara berturut-turut adalah sebesar 9,62 x 10-8 M dan 9,29 x 10-8 M.

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Dengue virus infection (DENV) is still one of the most common diseases in the world and sometimes causes death. Accurate early diagnosis is necessary to provide the right treatment. Because Indonesia is an archipelagic country, the detection method using PCR is less effective so a lateral flow assay (LFA) based tool that utilizes antibodies as its biosensor can be a solution. Developing nanobodies derived from Camelidae may overcome the drawbacks of monoclonal antibodies because they have higher solubility, better stability, and can be manipulated genetically. By using nanobodies previously produced by Asih et al. (2022) in E. coli which can detect DENV infection, the next step is to evaluate by using the surface plasmon resonance (SPR) method to obtain kinetic parameters on the interaction between nanobodies and NS1 protein as biomarkers of DENV infection. The study started with the preparation of E. coli culture, then continued with the expression of nanobodies by IPTG induction, purification of nanobodies, confirmation of nanobody acquisition by SDS-PAGE and Western Blot, then ended with the SPR test. Overall, both DD5 and DD7 appeared to be able to interact and bind to the NS1 DENV-2 antigen, according to the SPR signal response. The KD value obtained when the DD5 ligand interacted with various concentrations of NS1 DENV-2 was 1,08 x 10-7. Meanwhile, the KD values obtained when the NS1 ligand interacted with various concentrations of DD5 and DD7 were 9,62 x 10-8 and 9,29 x 10-8 respectively."

"This book offers the reader a practical guide to the control and characterization of laser diode beams. Following a short introduction to the working principles of laser diodes, the book describes the basics of laser diode beams and beam propagation, including Zemax modeling of a Gaussian beam propagating through a lens. The core of the book is concerned with laser diode beam manipulations, collimating and focusing, circularization and astigmatism correction, coupling into a single mode optical fiber, diffractive optics and beam shaping, and manipulation of multi transverse mode beams. The final chapter of the book covers beam characterization methods, describing the measurement of spatial and spectral properties, including wavelength and linewidth measurement techniques. "