Articles
<![CDATA[Analisis Lithium Tantalat (LiTaO3) Didoping Niobium Bervariasi Suhu ]]>
<![CDATA[Agus Ismangil]]>;
<![CDATA[Teguh Puja Negara]]>
<![CDATA[ PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2018: SEMINAR NASIONAL PENDIDIKAN SAINS DAN TEKNOLOGI ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Semarang ]]>
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<![CDATA[Litium tantalite memiliki formula kimia LiTaO3, dengan substrat Si Tipe –P (100) dengan metode chemical solution deposition dan spin coating dengan kecepatan 3000 rpm selama 30 seconds. LiTaO3 memiliki konsentrasi 2.5M dan suhu annealing 550°C, 600°C, 650°C, 700°C, 750°C, 800 °C. Film tipis LiTaO3 dikarakterisasi dengan ocean optic spectroscopy. Hasil dari karakterisasi spektroskopi film tipis LiTaO3absorbansi maksimumterjadi pada daerah infra merah yaitu pada panjang gelombang 780 nm, puncak absorbansi tertinggi pada film lithium tantalat pada suhu annealing 800oC dengan kata lain film LiTaO3 banyak menyerap energi foton dari cahaya yang mengenainya.Kata Kunci : LiTaO3, Absorbansi, spin coating, annealing]]>
<![CDATA[LITAO3 CHARACTERIZATION OF RUBIDIUM ON TEMPERATURE VARIATIONS ]]>
<![CDATA[Agus Ismangil]]>;
<![CDATA[Teguh Puja Negara]]>
<![CDATA[ Journal of Science Innovare Vol 1, No 02 (2018): Journal of Science Innovare, September 2018 ]]>
Publisher : <![CDATA[Universitas Pakuan ]]>
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DOI: 10.33751/jsi.v1i02.1005
<![CDATA[One of the studies that recently attracted the attention of physicists is research on ferroelectric material because this material is very promising for the development of new generation devices in connection with the unique properties it has. Ferroelectric materials, especially those based on a mixture of lithium tantalite (LiTaO3), are expected to be applied to the infrared sensor. Lithium tantalate (LiTaO3) is a ferroelectric material that is unique in terms of pyroelectric and piezoelectric properties that are integrated with good mechanical and chemical stability. Therefore LiTaO3 is often used for several applications such as electro-optical modulators and pyroelectric detectors. LiTaO3 is a non-hygroscopic crystal, colorless, soluble in water, has a high transmission rate and does not easily damage its optical properties. LiTaO3 is a material that has a high dielectric constant and a high load storage capacity. This research has succeeded in determining the band gap energy of the LiTaO3 film in the rubidium chamber obtained in the range of values 2.02-2.98 eV as shown in figure 4. The LiTaO3 film after the annealing process at a temperature of 650 oC, has the highest band gap energy of 2.98 eV. Large energy is needed on the electrons to be excited from the valence band to the conduction band. Whereas in the LiTaO3 film after an annealing process of 800 oC, the band gap energy obtained is 2.02 eV. This makes it easier for electrons to be excited from the valence band to the conduction band because the energy needed is not too large.]]>
<![CDATA[Analisa Surface Plasmon Polariton (SPR) pada Rod Metal Menggunakan Metode Finite Difference Time Domain (FDTD) ]]>
<![CDATA[Teguh Puja Negara]]>
<![CDATA[ KOMPUTASI Vol 14, No 1 (2017): Komputasi: Jurnal Ilmiah Ilmu Komputer dan Matematika ]]>
Publisher : <![CDATA[Ilmu Komputer, FMIPA, Universitas Pakuan ]]>
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DOI: 10.33751/komputasi.v14i1.278
<![CDATA[Simulasi perambatan gelombang elektromagnetik telah dilakukan pada rodmetal (metallic rod) menggunakan metode Finite Difference Time Domain (FDTD).Untuk polarisasi transverse electric (TE) terlihat adanya fenomena Surface Plasmon Polariton (SPR) pada permukaaan rod. Variasi diameter rod dillakukan untuk melihat panjang gelombang resonansi terjadinya fenomena tersebut. Sebagai pembanding, jika rod diganti dengan bahan dielektrik fenomena surface plasmon tidak terjadi.]]>
<![CDATA[SIMULASI PERAMBATAN GELOMBANG ELEKTROMAGNETIK PADA KRISTAL FOTONIK 2D MENGGUNAKAN METODE FINITE DIFFERENCE FREQUENCY DOMAIN ]]>
<![CDATA[Adly Maulana Suherman]]>;
<![CDATA[Teguh Puja Negara]]>;
<![CDATA[Hendradi Hardhienata]]>;
<![CDATA[Husin Alatas]]>
<![CDATA[ KOMPUTASI Vol 16, No 2 (2019): Komputasi: Jurnal Ilmiah Ilmu Komputer dan Matematika ]]>
Publisher : <![CDATA[Ilmu Komputer, FMIPA, Universitas Pakuan ]]>
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DOI: 10.33751/komputasi.v16i2.1619
<![CDATA[Numerical simulations on two-dimensional photonic crystals with defects were analyzed using the Finite Difference Frequency Domain (FDFD). This approach consists of Maxwell's formulation that uses Central Finite Difference to place fields and materials at discrete points of the Yee grid, so that the matrix wave equation is obtained in the form of column vectors. Absorbent boundary conditions use Perfectly Matched Layer (PML) with fictitious magnetic conductivity to shed incoming waves at the edge of the domain calculation. Photonic crystals can be assumed to be a periodic lattice of dielectric material that produces the phenomenon of photonic band gap (PBG). The results of FDFD simulations are compared with the literature with a difference of 0.056. This small difference value means that this method is good enough to analyze PBG phenomena. For point defects and the accumulation of electromagnetic waves, linear defects are investigated and analyzed with spectral responses. Insertion of defects in photonic crystals will produce a photonic pass band (PPB). The simulation results show that PPB depends on the angle of arrival vector, material permittivity, and width of the defect structure.]]>
<![CDATA[IMPLEMENTASI ALGORITMA TANDA TANGAN DIGITAL BERBASIS KRIPTOGRAFI KURVA ELIPTIK DIFFIE-HELLMAN ]]>
<![CDATA[Asep Saepulrohman]]>;
<![CDATA[Teguh Puja Negara]]>
<![CDATA[ KOMPUTASI Vol 18, No 1 (2021): Komputasi: Jurnal Ilmiah Ilmu Komputer dan Matematika ]]>
Publisher : <![CDATA[Ilmu Komputer, FMIPA, Universitas Pakuan ]]>
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DOI: 10.33751/komputasi.v18i1.2569
<![CDATA[In data communication systems, digital signatures are a form of electronic signature security services based on the Elliptic Curve Digital Signature Algorithm (ECDSA) which are considered resistant to certain types of attacks. Attacks on digital signature schemes aim to fake a signature or are called forgery which is said to be successful if the key pair and signature generated by the attacker are accepted by the verifier. Mathematical schemes used to prove the authenticity of messages or digital documents or guarantees that the data and information actually come from the correct source. ECDSA-based digital signatures rely on discrete logarithmic problems as the basis for mathematical calculations. Q = kP where Q and P are the points of the elliptic curve in the finite field or and k is a positive integer number. The hash function generated from the algorithm process is then encoded (encrypted) with an asymmetric key cryptographic algorithm. In this work use p = 149 to encrypt plain text by converting the original message using dots on a curve with the help of Python programs. ]]>
<![CDATA[Film Tipis LiTaO3 Didoping Rubidium Menggunakan Metode CSD Untuk Aplikasi Sensor Infra Merah ]]>
<![CDATA[Agus Ismangil]]>;
<![CDATA[Teguh Puja Negara]]>;
<![CDATA[Agung Prajuhana]]>;
<![CDATA[Muhammad Iqbal]]>
<![CDATA[ Prosiding Seminar Nasional Sains Teknologi dan Inovasi Indonesia (SENASTINDO) Vol 1 (2019): Prosiding Seminar Nasional Sains Teknologi dan Inovasi Indonesia (Senastindo) ]]>
Publisher : <![CDATA[Akademi Angkatan Udara ]]>
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<![CDATA[Litium tantalat memiliki formula kimia LiTaO3, dengan substrat Si Tipe –P (100) dengan metode chemical solution deposition dan spin coating dengan kecepatan 3000 rpm selama 30 seconds. LiTaO3 memiliki konsentrasi 2.5M dan suhu annealing 800 °C. Film tipis LiTaO3 dikarakterisasi dengan ocean optic spectroscopy. Hasil dari karakterisasi spektroskopi film lithium tantalat murni pada suhu annealing 800 oC menghasilkan panjang gelombang 935 nm, Sedangkan film tipis litium tantalat yang didoping rubidium terlihat puncak absorbansi tertinggi pada suhu annealing 800oC menghasilkan panjang gelombang 934 nm, puncak absorbansi tertinggi pada film lithium tantalat pada suhu annealing 800 oC dengan kata lain film LiTaO3 banyak menyerap energi foton dari cahaya yang mengenainya serta film tipis litium tantalat menjadi cikal bakal sensor infra merah.]]>
<![CDATA[Simulasi Gelombang Elektromagnetik Pada Waveguide Menggunakan Metode Finite Difference Time Domain Untuk Aplikasi Radar ]]>
<![CDATA[Teguh Puja Negara]]>;
<![CDATA[Erniyati Erniyati]]>;
<![CDATA[Agus Ismangil]]>
<![CDATA[ Prosiding Seminar Nasional Sains Teknologi dan Inovasi Indonesia (SENASTINDO) Vol 1 (2019): Prosiding Seminar Nasional Sains Teknologi dan Inovasi Indonesia (Senastindo) ]]>
Publisher : <![CDATA[Akademi Angkatan Udara ]]>
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<![CDATA[Electromagnetic wave simulation on waveguide has been carried out using the FDTD method. The electric field is reflected when it hits the dielectric rod and is transmitted over the canal. for metal rods, the electric field is blocked on the rod and dominant over the canal. The energy density transmitted at the end of the computational domain has been calculated and has different values according to the material used on the rod. These results can be applied to radar to detect objects using waves.]]>
<![CDATA[Pengaruh Doping LiTaO3 Menggunakan Metode Chemical Solution Deposition ]]>
<![CDATA[Agus Ismangil]]>;
<![CDATA[Teguh Puja Negara]]>;
<![CDATA[Muhammad Iqbal]]>
<![CDATA[ Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 8, No 1 (2019): Maret ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar ]]>
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DOI: 10.35580/sainsmat81106912019
<![CDATA[Telah ditumbuhkan litium tantalite LiTaO3 dengan substrat Si Tipe –P (100) dengan metode chemical solution deposition dan spin coating dengan kecepatan 3000 rpm selama 30 seconds. hasil yang didapat absorbansi maksimum dari film lithium tantalat didoping niobium terjadi pada daerah infra merah yaitu pada puncak panjang gelombang 780 nm perbedaan dari dua puncak absorbansi antara litium tantalat murni dengan litium tantalat didoping niobium pada suhu 800 oC terjadi pergeseran puncak absorbansi dengan nilai panjang gelombang dari 935 nm menjadi 780 nm. dengan kata lain film LiTaO3 banyak menyerap energi foton dari cahaya yang mengenainya dan film tipis litium tantalat didoping niobium cikal bakal menjadi sensor infra merah.]]>
<![CDATA[Pengaruh Doping LiTaO3 Menggunakan Metode Chemical Solution Deposition ]]>
<![CDATA[Agus Ismangil]]>;
<![CDATA[Teguh Puja Negara]]>;
<![CDATA[Muhammad Iqbal]]>
<![CDATA[ Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 8, No 1 (2019): Maret ]]>
Publisher : <![CDATA[Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar ]]>
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DOI: 10.35580/sainsmat81106912019
<![CDATA[Telah ditumbuhkan litium tantalite LiTaO3 dengan substrat Si Tipe –P (100) dengan metode chemical solution deposition dan spin coating dengan kecepatan 3000 rpm selama 30 seconds. hasil yang didapat absorbansi maksimum dari film lithium tantalat didoping niobium terjadi pada daerah infra merah yaitu pada puncak panjang gelombang 780 nm perbedaan dari dua puncak absorbansi antara litium tantalat murni dengan litium tantalat didoping niobium pada suhu 800 oC terjadi pergeseran puncak absorbansi dengan nilai panjang gelombang dari 935 nm menjadi 780 nm. dengan kata lain film LiTaO3 banyak menyerap energi foton dari cahaya yang mengenainya dan film tipis litium tantalat didoping niobium cikal bakal menjadi sensor infra merah.]]>
<![CDATA[LITAO3 CHARACTERIZATION OF RUBIDIUM ON TEMPERATURE VARIATIONS ]]>
<![CDATA[Agus Ismangil]]>;
<![CDATA[Teguh Puja Negara]]>
<![CDATA[ Journal of Science Innovare Vol 1, No 2 (2018): Journal of Science Innovare, Volume 01 Number 02 2018 ]]>
Publisher : <![CDATA[Universitas Pakuan ]]>
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DOI: 10.33751/jsi.v1i02.1005
<![CDATA[One of the studies that recently attracted the attention of physicists is research on ferroelectric material because this material is very promising for the development of new generation devices in connection with the unique properties it has. Ferroelectric materials, especially those based on a mixture of lithium tantalite (LiTaO3), are expected to be applied to the infrared sensor. Lithium tantalate (LiTaO3) is a ferroelectric material that is unique in terms of pyroelectric and piezoelectric properties that are integrated with good mechanical and chemical stability. Therefore LiTaO3 is often used for several applications such as electro-optical modulators and pyroelectric detectors. LiTaO3 is a non-hygroscopic crystal, colorless, soluble in water, has a high transmission rate and does not easily damage its optical properties. LiTaO3 is a material that has a high dielectric constant and a high load storage capacity. This research has succeeded in determining the band gap energy of the LiTaO3 film in the rubidium chamber obtained in the range of values 2.02-2.98 eV as shown in figure 4. The LiTaO3 film after the annealing process at a temperature of 650 oC, has the highest band gap energy of 2.98 eV. Large energy is needed on the electrons to be excited from the valence band to the conduction band. Whereas in the LiTaO3 film after an annealing process of 800 oC, the band gap energy obtained is 2.02 eV. This makes it easier for electrons to be excited from the valence band to the conduction band because the energy needed is not too large.]]>
