LED03 – RGB LED active region design and optimization with Genetic Evolution Algorithm

Mamedov D. V., Kisin M. V., Chuang C.-L., El-Ghoroury H. S.

Multi-quantum-well (MQW) LED is a complex distributed system with strong interaction between two opposite carrier flows, electrons and holes. For both types of carriers, the carrier injection into each QW depends on transport conditions across the whole active region (AR) and is affected by capture-recombination balance in all active QWs. Multi-color LEDs with different types […]

55

4

P19 – Numerical Assessment of Bloch Surface Wave 1D-PhC Sensor using Ba2NaNb5O15 Defect Layer

Sagar K., Kumar A.

In this paper, a top defective layer of Barium sodium niobate (Ba2NaNb5O15) material of nanometer range thickness is used to confine Bloch surface mode at the upper interface of the proposed structure. For a 1275 nm operating wavelength, the structural characteristics are intended to stimulate a BSW at the top interface. Wavelength interrogation, angle interrogation, […]

28

LED02 – Carrier Transport in Multi Colour Deep Ultraviolet Light Emitting Diodes

Hofmann G., Höpfner J., Schilling M., Muhin A., Römer F., Wernicke T., Kneissl M., Witzigmann B.

Deep ultraviolet (DUV) light emitting diodes (LEDs) and lasers are enabled by high band gap Aluminium Gallium Nitride (AlGaN). The efficiency of recent multi quantum well (MQW) DUV emitters is still in the percent range which can be in part attributed to the hole injection. The hole injection and the carrier distribution in the high […]

76

6

LD12 – Study of reflectivity and resistance properties of p-type distributed Bragg reflectors with composition graded interfaces

Cheng L., Yang D., Yao S.

In this work, the reflectivity and series resistance of the p-type distributed Bragg reflectors (DBRs) in vertical cavity surface emitting lasers (VCSELs) under the different thickness of composition graded interface layers, Al composition of the high Al composition layers, Al composition of the low Al composition layers, and the number of DBR periods are simulated […]

59

4

N05 – Effect of Poole-Frenkel emission on electroluminescence in quantum dot light emitting devices with Nickel Oxide layer

Rani S., Kumar J.

Theoretical analysis of hybrid quantum dot-light emitting devices incorporating CdSe/ZnS core/shell quantum dots and Nickel Oxide (NiO) as hole injection layer (HIL) has been carried out in this work. The replacement of organic HIL such as poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) with solution-processed NiO layer has led to enhancement of current density and luminance in the device by […]

36

2

LD01 – Steady states in dynamical semiconductor laser models and their analysis

Radziunas M.

We present an algorithm for calculating steady states in the dynamic PDE model for SLs admitting gain compression, spatial hole burning, and multilevel carrier rate equations. Presented example simulations rely on 1(time)+1(space)-dimensional traveling-wave- and Lang-Kobayashi-type models.

154

4

SC05 – Highly Efficient Dome Shaped Nanowires Solar Cell

El-Bashar R., Hameed M. F. O., Obayya S. S. A.

The optical characteristics of Si dome-tapered nanowires (NWs) solar cell (SC) are reported and analyzed by using finite difference time domain method. The geometrical parameters are studied to maximize the light absorption and hence the ultimate efficiency and short circuit current density of the reported NWs SC. The dome-shaped NWs show better absorption enhancement than […]

59

5

SC03 – Simulation and Optimization of Nano-structured Gratings Alternative of Thin-film Anti-Reflectors for GaAs Solar Cells Conversion Efficiency Improvement

Das N., Sharma A., Khairul Basar M., Nur-E-Alam M.

Modern civilization demands energy, and the energy demand is increasing almost every day all over the world. The dependency on conventional energy resources including fossil fuel, oil, gas, coal etc. are not in favor of having sustainable global earth. For this reason, renewable or clean energy is one only option while acquiring energy from the […]

63

11

IS09 – Collision Dynamics of Solitons in a Grating Assisted Semilinear dual-core System with Phase Mismatch

Saha S., Atai J.

The collision dynamics between two counterpropagating moving Bragg grating solitons and their outcomes in a model of semilinear dual-core Bragg-grating coupler with phase mismatch are investigated. The influence of gratings phase mismatch on the collision outcomes is also discussed.

58

5

LD06 – Relative intensity noise of injection-locked epitaxial quantum dot laser on silicon

Chu Q., Zhao S., Grillot F., Wang J., He F., Zhang M., Xu X., Yao Y., Duan J.

This work investigates the relative intensity noise (RIN) characteristics of quantum dot (QD) lasers epitaxially grown on silicon subject to the optical injection. The effect of threading dislocation (TD), which acts as nonradiative recombination centers in the Shockley-Read-Hall (SRH) process, is considered in the rate equation model. The results reveal that the RIN is enhanced […]

55

IS01 – Network Authentication with Synchronized Chaotic Lasers

Lombardi L., Annovazzi-Lodi V., Aromataris G.

We numerically study a hardware method for network authentication, where a pair of matched (twins) chaotic lasers generate the same chaos when they synchronize, being subject to the same optical injection from a third chaotic laser. One of the lasers is in the secure environment, the other in the unsecure environment, and authorization is granted […]

37

2

N09 – Beam shaping using a chain of photonic nanojet induced plasmonics

Photonic nanojet arises from a microcavity leading to high electric field. On the other hand, metal nanoparticles (NPs) lead to high field due to localization in small volumes. In this work, PNJ from an array of cavity induced plasmon resonances has been studied. The sharp profile of the PNJ has been observed by the inclusion […]

52

4

LD09 – Simulation of the Spectral Behavior in High-Power Distributed Feedback Lasers above Threshold

Reggentin M., Koester J.-P., Wenzel H., Knigge A.

We report on the simulations of mode hopping behavior in semiconductor distributed feedback lasers with asymmetric facet reflectivities above threshold and its dependence on the phase between the grating and the high reflective facet.

94

3

IS05 – Thermal crosstalk mitigation in a dual-drive Mach-Zehnder Modulator

De S., Das R., Singh K., Mandalawi Y., Kleine-Ostmann T., Schneider T.

Dual-drive, PIN-diode based Mach-Zehnder modulators are pivotal for power-efficient and cost-effective CMOS compatible optical transceivers with small footprints. However, the basic chip materials have substantial thermal conductance resulting in thermal crosstalk, which eventually deteriorates the modulator performance in terms of bandwidth and data transmission capabilities. In this work, we simulate and analyze the influence of […]

47

2

P12 – Design and Simulation of Temperature Sensors Based on Thermo-Optical WGM Shifts in Silica and Non-Silica Glass Microcavities

Marisova M. P., Andrianov A. V., Anashkina E. A.

Sensing applications of dielectric microcavities with whispering-gallery modes (WGMs) have been actively studied in the recent years. Here we investigated theoretically temperature microsensors based on different glasses, including common silica glass, as well as special germanate, tungsten-tellurite, arsenic sulfide and arsenic selenide glasses. We developed numerical model describing sensing characteristics of the considered microcavities. We […]

99

11

IS07 – OFDM Transmission using a Self-seeded ring Cavity based on a Semiconductor Optical Amplifier

This paper discusses the transmission of optical Orthogonal Frequency-Division Multiplexing (OFDM) format modulation in a resonant cavity based on a Semiconductor Optical Amplifiers Fiber Cavity Laser (SOA-FCL). The OFDM Subcarriers are configured and transmitted to fit the Cavity Resonance Modes (CRM). As a result, the authors show a novel principle of OFDM transmission in a […]

65

8

D02 – Electro-Optical Simulation and Characterization of DCR and secondary emission in SPADs

Novakovic B., Raymond K., Gallina G., Xie L., Retiere F., McGuire D.

We demonstrate the use of simulations in the modeling and characterization of important aspects of Single Photon Avalanche Detectors (SPADs). Electrically, we discuss the use of drift-diffusion and avalanche triggering probability solvers and results for dark count rate (DCR) and their comparison to measurements. Optically, we discuss the use of full wave electromagnetic solvers to […]

61

3

IS06 – Characteristics of All-Optical Gate Switch Employing Quasi-Phase-Matched Lithium Niobate Devices

Abe G., Umemoto S., Miyauchi R., Fukuchi Y.

We analyze characteristics of all-optical switches using the cascade of second harmonic generation and difference frequency mixing in quasi-phase-matched lithium niobate devices. Numerical calculations consider not only the pulse waveforms but also the optical noises.

58

3

D08 – Numerical Simulation on the Effect of Operation Temperature on the Optical Transfer Characteristics for GaN/AlGaN SAM Avalanche Photodiodes

Wang M., Wang Z., Wang X., Cui H., Chen Y., Ma W.

GaN/AlGaN avalanche photodiodes (APDs) have important application values and broad application potentials in the field of solar-blind ultraviolet (UV) detection. However, the self-heating effect has an obvious influence on the output characteristics of GaN/AlGaN APDs. In order to study the influence of self-heating temperature on its performance, the numerical model of GaN/AlGaN APDs is established […]

35

1

P13 – Genetic algorithm optimization of infrared plasmonic absorbers

Souza Bezerra D., Rodriguez-Esquerre V. F.

The absorption of a multiband absorber based on a periodical plasmonic grating has been optimized. The optical and geometrical parameters of the plasmonic structure which is composed of germanium and gold are determined by an efficient genetic algorithm. The electromagnetic response of the absorber is numerically obtained by using the frequency domain finite element method. […]

59

6

D05 – Mode-Guided Infrared Absorption in Ge/SiO2 Grating for Large-Angle and Broadband Photodetection

Hsu C.-Y., Pei Z., Liu J.-M.

The numerical simulation of the electromagnetic properties of the Ge/SiO2 grating structure with bottom distributed Bragg reflector. With mode guiding in Ge, the structure exhibits an absorption angle of 100° and broadband behavior from 1300 to 1500 nm.

39

4

IS04 – All-optical AND Logic Gate Based on Semiconductor Optical Amplifiers for Implementing Deep Recurrent Neural Networks

Alam B., Ceschini A., Rosato A., Panella M., Asquini R.

The development of optical logic gates is a key factor for enabling next generation of computations in the context of Deep Learning and Quantum Computing. In this work, we introduce a scheme for the implementation of an all-optical AND logic gate, which makes use of semiconductor optical amplifiers (SOA) in cross-phase modulation configuration combined with […]

127

9

N03 – Band structures in highly strained 3D nanowires

Hadjimichael Y., Marquardt O., Merdon O., Farrell P.

We mathematically derive a new nonlinear strain model to simulate the conduction and valence bands in highly bent 3D hexagonal nanowires with GaAs core and asymmetric (AlαIn1-α)As stressor. The model is based on a transformation of the 1st Piola-Kirchhoff stress tensor and an appropriate energy functional that captures the dynamics of the induced strain due […]

65

7

IS08 – Flat-band 8-Channel Optical MUX/DeMUX for Long Reach 400GbE Applications

Jeong S.-H.

We propose novel optical demultiplexer scheme for LR-8 applications, and theoretically verify flatband spectral response with the discrete 8-channel wavelengths. By the additional band rejection filter, non-continuous wavelength filtering response was achieved with spectral flatness and low crosstalk of < -15dB within an entire LR-8 targeted spectral range.

36

4

P09 – 120° Hybrid for Bimodal Interferometers

An 120° hybrid for bimodal interferometers in the 220 nm silicon-on-insulator technology is presented. Three output signals enable an unambiguous phase detection over a 360°-range as well as a constant sensitivity. The length of the hybrid is only 190 µm with a simulated excess loss of 0.16 dB. Measurements combined with digital signal processing verify […]

130

2

LD07 – Physics-based time-domain modeling of VCSELs

D’Alessandro M., Gullino G., Tibaldi A., Bertazzi F., Goano M., Debernardi P.

This paper presents the results of a physics-based time-domain simulator for a vertical-cavity surface-emitting laser (VCSEL). We implemented a trapezoidal rule second order backward differentiation formula (TR-BDF2) to simulate the large signal response of the device under investigation, including the parasitic effects of the pin junction arising from an interplay of optical and carrier transport […]

97

7

MM09 – FiPo FDTD: Computational Electrodynamics Technique Producing Both Fields and Potentials

Avazpour L., King M., Belling S., Knezevic I.

We present the field–potential finite-difference time-domain (FiPo FDTD) algorithm, which solves a set of first-order equations for the electric and magnetic fields (E and H), as well as the magnetic vector potential A and the scalar electric potential φ in the Lorenz gauge. We also present the derivation and implementation of a convolutional perfectly matched […]

53

NM08 – Silicon-Based Plasmonic Nanoantennas at midinfrared for Gas Sensing Applications

Alsayed A. E., Ghanim A. M., Yahia A., Swillam M. A.

Advanced nanotechnology especially CMOS technology- enables us to re-design the classic antenna in the nanoscale, which can convert propagating optical wavelengths instead of radio and microwave wavelengths into localized energy and vice versa. As a result, sensors may be designed to make sensing molecules with their characteristic vibrational transitions easier. Bowtie silicon nanoantennas are investigated […]

48

7

LD10 – Effect of Self-Phase Modulation on The Signal Quality of Fourier Domain Mode-Locked Lasers

Aşırım O. E., Huber R., Jirauschek C.

In this paper, the impact of self-phase modulation on the noise performance of Fourier Domain Mode-Locked (FDML) lasers is investigated. It is shown that under a relatively high fiber nonlinearity and/or intracavity signal amplitude, an excess amount of noise generation occurs, which can not only lead to poor signal quality, but also operational instability. Hence, […]

55

7

P23 – Nanoplasmonic Ultra Compact, Low Insertion Loss UWB Band-Pass Filter Using Square Ring Resonators

Thirupathaiah K., Rao L. K., Boda R.

This article presents the design and analysis of a nanoplasmonic ultra wide band (UWB) band-pass filter based on metal insulator metal (MIM) slot-waveguide using three square ring resonators (SRRs) for obtaining ultra wide band nature at optical frequencies. This filter shows the low insertion loss due to the zero coupling gaps and no mismatch between […]

48

5