Tunable Room Temperature THz Sources Based on Nonlinear Mixing in a Hybrid Optical and THz Micro-Ring Resonator

Raju, Salahuddin; Karabiyik, Mustafa; Al-Amin, Chowdhury; Vabbina, Phani Kiran; Güney, Durdu Ö.; Pala, Nezih

doi:10.1038/srep09422

Cited by 23 publications

(14 citation statements)

References 29 publications

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“…Large electro-optic (EO) coefficients [1] are beneficial for efficient operation of e.g. fieldsensors [2][3][4][5][6][7][8][9][10], for nonlinear frequency conversion [11][12][13][14][15][16][17] or electro-optical data modulation [18][19][20][21][22][23][24][25][26]. EO modulators are of particular importance as they are ubiquitously used in optical communications.…”

Section: Introductionmentioning

confidence: 99%

Nonlinearities of organic electro-optic materials in nanoscale slots and implications for the optimum modulator design

et al. 2017

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The performance of highly nonlinear organic electro-optic (EO) materials incorporated into nanoscale slots is examined. It is shown that EO coefficients as large as 190 pm/V can be obtained in 150 nm wide plasmonic slot waveguides but that the coefficients decrease for narrower slots. Possible mechanism that lead to such a decrease are discussed. Monte-Carlo computer simulations are performed, confirming that chromophore-surface interactions are one important factor influencing the EO coefficient in narrow plasmonic slots. These highly nonlinear materials are of particular interest for applications in optical modulators. However, in modulators the key parameters are the voltage-length product U_πL and the insertion loss rather than the linear EO coefficients. We show record-low voltage-length products of 70 Vµm and 50 Vµm for slot widths in the order of 50 nm for the materials JRD1 and DLD164, respectively. This is because the nonlinear interaction is enhanced in narrow slot and thereby compensates for the reduced EO coefficient. Likewise, it is found that lowest insertion losses are observed for slot widths in the range 60 to 100 nm.

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Section: Introductionmentioning

confidence: 99%

Nonlinearities of organic electro-optic materials in nanoscale slots and implications for the optimum modulator design

et al. 2017

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“…However, the radius of MRRs in Reference 13 is smaller when compared to proposed system. Also, the radius of proposed system is smaller when compared to that of Reference 14 however, in Reference 14 the range of generated THz frequency components is very high as compared to proposed system.…”

Section: Simulation Resultsmentioning

confidence: 85%

“…There have been a couple of works reported in literature based on MRRs for THz signal generation 11‐15 . These techniques have generated THz signals based on different schemes and have employed different material platform for modeling the MRR.…”

Section: Introductionmentioning

confidence: 99%

Terahertz signal generation based on a microwave photonic system with add‐drop microring resonator

Katti

Prince

2020

Micro & Optical Tech Letters

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A microwave photonic system based on a silicon add‐drop microring resonator is proposed and analyzed in simulation environment. It is observed that when a pulsed laser source (PLS) of repetition rate of 100 Gbps is fed to input port of MRR and a PLS with repetition rate of 50 Gbps is fed at the add port of the MRR, THz signals in the frequency band of 0.1‐1.5 THz are generated with a spacing of 0.05 THz. The power of the highest frequency component (1.5 THz) is ‐65.1 dBm when the pulse width of PLS is 0.1 ps. This generation of THz signals is a result of interference between two optical signals of different repetition rates which are evanescently coupled into the ring cavity at the input ports of MRR. It is found that power of THz signal is higher when the pulse width of PLS is smaller.

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“…The resonator, made from (Si), placed on top of the feed line is made from dielectric material. It has the shape of an equilateral triangle with properties as ε r = 11.9 and estimated loss tangent tan δ = 0.003 at 100 THz [40]. The nanoantenna is excited and matched considering 50 Ω impedance source.…”

Section: Equilateral Triangular Dielectric Resonator Nantennamentioning

confidence: 99%

Dielectric Resonator Nantennas for Optical Communication

Sethi¹,

Vettikalladi²,

Fathallah³

et al. 2017

Optical Communication Technology

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Dielectric resonator antennas (DRA) are ceramic based materials that are nonmetallic in nature. They offer high permitivity values (ε r : 10-100). DRAs' have made their mark in various applications specially in the microwave and millimeter wave (MMW) spectrum, and are making encouraging progress in the THz band, because of their low conduction losses and higher radiation efficiencies compared to their metallic counterparts. With the advancements in nano fabrication, metallic antennas designed in the THz band have taken an interest. These antennas are termed as optical antennas or nantennas. Optical antennas work by receiving the incident electromagnetic wave or light and focusing it on a certain point or hot spot. Since most of the antennas are metallic based with Noble metals as radiators, the conducting losses are huge. One solution that we offer in this work is to integrate the nantennas with DRs. Two different DR based designs, one triangular and other hexagonal, are presented. Both the antennas operate in the optical C-band window (1550 nm). We design, perform numerical analysis, simulate, and optimize the proposed DR nantennas. We also consider array synthesis of the proposed nantennas in evaluating how much directive the nantennas are for use in nano network applications.

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Tunable Room Temperature THz Sources Based on Nonlinear Mixing in a Hybrid Optical and THz Micro-Ring Resonator

Cited by 23 publications

References 29 publications

Nonlinearities of organic electro-optic materials in nanoscale slots and implications for the optimum modulator design

Nonlinearities of organic electro-optic materials in nanoscale slots and implications for the optimum modulator design

Terahertz signal generation based on a microwave photonic system with add‐drop microring resonator

Dielectric Resonator Nantennas for Optical Communication

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