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Integrated Nanophotonic Control of Thermal Bimorph Microactuators (2024)
Journal Article
Nezhad, M. P. (2024). Integrated Nanophotonic Control of Thermal Bimorph Microactuators. #Journal not on list, 1-6. https://doi.org/10.1109/marss61851.2024.10612732

A new type of thermal bimorph microactuator is presented, in which energy delivery to the actuator is achieved through an integrated nanophotonics approach. This approach has been adopted from existing photonic device and optical communications techn... Read More about Integrated Nanophotonic Control of Thermal Bimorph Microactuators.

On the merits of a unified physics and engineering undergraduate programme of study (2022)
Journal Article
Nezhad, M. P. (2022). On the merits of a unified physics and engineering undergraduate programme of study. Physics Education, 57, 045501. https://doi.org/10.1088/1361-6552/ac529a

The merits of a pedagogic and programmatic unification between physics and several engineering disciplines at the undergraduate level are discussed. Arguments for such a unification are presented, based on the strong overlap of core teaching material... Read More about On the merits of a unified physics and engineering undergraduate programme of study.

Suspended nanocrystalline diamond ridge waveguides designed for the mid-infrared (2021)
Journal Article
Rahmati, A. T., Mashanovich, G. Z., & Nezhad, M. P. (2021). Suspended nanocrystalline diamond ridge waveguides designed for the mid-infrared. Journal of Optics, 23, 075801. https://doi.org/10.1088/2040-8986/ac0873

A comprehensive study and design of air-clad suspended ridge diamond waveguides for operation across the 2.5–16 µm spectral range is presented, specifically targeting nanocrystalline diamond (NCD) thin films directly grown on silicon substrates. Thre... Read More about Suspended nanocrystalline diamond ridge waveguides designed for the mid-infrared.

Isotropic silicon etch characteristics in a purely inductively coupled SF6 plasma (2019)
Journal Article
Panduranga, P., Abdou, A., Ren, Z., H. Pedersen, R., & P. Nezhad, M. (2019). Isotropic silicon etch characteristics in a purely inductively coupled SF6 plasma. Journal of Vacuum Science and Technology B, 37(6), https://doi.org/10.1116/1.5116021

The characteristics of isotropic etching of silicon in a purely inductively coupled SF plasma are quantitatively studied. Since the etch results are strongly dependent on mask features, the authors investigated both large area and narrow trench etch... Read More about Isotropic silicon etch characteristics in a purely inductively coupled SF6 plasma.

CO2 laser micromachining of nanocrystalline diamond films grown on doped silicon substrates (2016)
Journal Article
Richter, J., Abdou, A., Williams, O., Witzens, J., & Nezhad, M. (2016). CO2 laser micromachining of nanocrystalline diamond films grown on doped silicon substrates. Optical Materials Express, 6, 3916-3926. https://doi.org/10.1364/OME.6.003916

We demonstrate that nanocrystalline diamond films grown on highly doped silicon substrates can be patterned using a CO2 laser operating at a wavelength of 10.6 μm, where both low doped silicon and diamond exhibit negligible optical absorption. The pa... Read More about CO2 laser micromachining of nanocrystalline diamond films grown on doped silicon substrates.

On the measurement of the Pockels effect in strained silicon (2015)
Journal Article
Azadeh, S., Merget, F., Nezhad, M., & Witzens, J. (2015). On the measurement of the Pockels effect in strained silicon. Optics Letters, 40(8), 1877-1880. https://doi.org/10.1364/OL.40.001877

We measure the voltage-dependent phase shift in silicon waveguides strained by a silicon nitride layer and show that, in our measurements, the phase shift is due to free carrier accumulation inside the waveguides. Nonetheless, inverting the applied v... Read More about On the measurement of the Pockels effect in strained silicon.

Silicon nanophotonic devices for chip-scale optical communication applications [Invited] (2013)
Journal Article
Fainman, Y., Nezhad, M., Tan, D., Ikeda, K., Bondarenko, O., & Grieco, A. (2013). Silicon nanophotonic devices for chip-scale optical communication applications [Invited]. Applied Optics, 52(4), 613-624. https://doi.org/10.1364/AO.52.000613

This paper reviews recent work in the area of silicon photonic devices and circuits for monolithic and heterogeneous integration of circuits and systems on a chip. In this context, it presents fabrication results for producing low-loss silicon wavegu... Read More about Silicon nanophotonic devices for chip-scale optical communication applications [Invited].

Silicon photonics plasma-modulators with advanced transmission line design (2013)
Journal Article
Merget, F., Azadeh, S., Mueller, J., Shen, B., Nezhad, M., Hauck, J., & Witzens, J. (2013). Silicon photonics plasma-modulators with advanced transmission line design. Optics Express, 21(17), 19593-19607. https://doi.org/10.1364/OE.21.019593

We have investigated two novel concepts for the design of transmission lines in travelling wave Mach-Zehnder interferometer based Silicon Photonics depletion modulators overcoming the analog bandwidth limitations arising from cross-talk between signa... Read More about Silicon photonics plasma-modulators with advanced transmission line design.

Purcell effect in sub-wavelength semiconductor lasers (2013)
Journal Article
Gu, Q., Slutsky, B., Vallini, F., Smalley, J., Nezhad, M., Frateschi, N., & Fainman, Y. (2013). Purcell effect in sub-wavelength semiconductor lasers. Optics Express, 21(13), 15603-15617. https://doi.org/10.1364/OE.21.015603

We present a formal treatment of the modification of spontaneous emission rate by a cavity (Purcell effect) in sub-wavelength semiconductor lasers. To explicitly express the assumptions upon which our formalism builds, we summarize the results of non... Read More about Purcell effect in sub-wavelength semiconductor lasers.

Optical bistability in a silicon waveguide distributed bragg reflector Fabry-pérot resonator (2012)
Journal Article
Grieco, A., Slutsky, B., Tan, D., Zamek, S., Nezhad, M., & Fainman, Y. (2012). Optical bistability in a silicon waveguide distributed bragg reflector Fabry-pérot resonator. Journal of Lightwave Technology, 30(14), 2352-2355. https://doi.org/10.1109/JLT.2012.2197731

We demonstrate optical bistability in a silicon waveguide Fabry-Pérot resonator formed by a pair of distributed Bragg reflectors. In the bistable regime, the output power of the resonator ceases to be uniquely determined by the input power because mu... Read More about Optical bistability in a silicon waveguide distributed bragg reflector Fabry-pérot resonator.

Etch-free low loss silicon waveguides using hydrogen silsesquioxane oxidation masks (2011)
Journal Article
Nezhad, M., Bondarenko, O., Khajavikhan, M., Simic, A., & Fainman, Y. (2011). Etch-free low loss silicon waveguides using hydrogen silsesquioxane oxidation masks. Optics Express, 19(20), 18827-18832. https://doi.org/10.1364/OE.19.018827

An etch-free fabrication technique for creating low loss silicon waveguides in the silicon-on-insulator material system is proposed and demonstrated. The approach consists of local oxidation of a silicon-on-insulator chip covered with a e-beam patter... Read More about Etch-free low loss silicon waveguides using hydrogen silsesquioxane oxidation masks.

Polarization weighting of Fano-type transmission through bi-dimensional metallic gratings (2010)
Journal Article
Tetz, K., Lomakin, V., Nezhad, M., Pang, L., & Fainman, Y. (2010). Polarization weighting of Fano-type transmission through bi-dimensional metallic gratings. Journal of the Optical Society of America A, 27(4), 911-917. https://doi.org/10.1364/JOSAA.27.000911

We demonstrate an approach allowing isolating effects of surface plasmon polariton mediated resonant transmission in a periodic grating by means of polarization rotation. The grating comprises a square array of cylindrical holes in an optically thick... Read More about Polarization weighting of Fano-type transmission through bi-dimensional metallic gratings.

Compact chip-scale filter based on curved waveguide Bragg gratings (2010)
Journal Article
Zamek, S., Tan, D., Khajavikhan, M., Ayache, M., Nezhad, M., & Fainman, Y. (2010). Compact chip-scale filter based on curved waveguide Bragg gratings. Optics Letters, 35(20), 3477-3479. https://doi.org/10.1364/OL.35.003477

We propose a method for miniaturization of filters based on curved waveguide Bragg gratings, so that long structures can be packed into a small area on a chip. This eliminates the stitching errors introduced in the fabrication process, which compromi... Read More about Compact chip-scale filter based on curved waveguide Bragg gratings.

Low threshold gain metal coated laser nanoresonators (2008)
Journal Article
Mizrahi, A., Lomakin, V., Slutsky, B., Nezhad, M., Feng, L., & Fainman, Y. (2008). Low threshold gain metal coated laser nanoresonators. Optics Letters, 33(11), 1261-1263. https://doi.org/10.1364/OL.33.001261

We introduce a low refractive index layer between the metal and the gain medium in metal-coated laser resonators and demonstrate that it can significantly reduce the dissipation losses. Analysis of a gain medium waveguide shows that for a given waveg... Read More about Low threshold gain metal coated laser nanoresonators.