124 citations · 214 across the 11 of their papers we have counts for
11 papers
Optical heterodyne microscopy of operating spin Hall nano-oscillator arrays
A. Alemán, A. A. Awad, S. Muralidhar +5
Optical heterodyne detection is a powerful technique for characterizing a wide range of physical excitations. Here, we use two types of optical heterodyne detection techniques (fun…
Optothermal control of spin Hall nano-oscillators
Shreyas Muralidhar, Afshin Houshang, Ademir Alemán +3
We investigate the impact of localized laser heating on the auto-oscillation properties of a 170 nm wide nano-constriction spin Hall nano-oscillators (SHNO) fabricated from a NiFe/…
Femtosecond laser comb driven perpendicular standing spin waves
Ahmad A. Awad, Shreyas Muralidhar, Ademir Alemán +3
We study femtosecond laser comb driven sustained and coherent spin wave (SW) generation in permalloy (Py) films over a thickness range of 40--100 nm. A simple rapid demagneti…
Experimental confirmation of the delayed Ni demagnetization in FeNi alloy
Somnath Jana, Ronny Knut, Shreyas Muralidhar +6
Element-selective techniques are central for the understanding of ultrafast spin dynamics in multi-element materials like magnetic alloys. Recently, though, it turned out that the…
Using the photo-induced resonance shift in Fe and Ni as time reference for ultrafast experiments at low flux soft X-ray sources
Somnath Jana, Shreyas Muralidhar, Johan Åkerman +2
We study the optical-pump induced ultrafast transient change of the X-ray absorption at the absorption resonances of the transition metals Ni and Fe in FeNi a…
Femtosecond laser pulse driven caustic spin wave beams
S. Muralidhar, R. Khymyn, A. A. Awad +4
Controlling the directionality of spin waves is a key ingredient in wave-based computing methods such as magnonics. In this paper, we demonstrate this particular aspect by using an…
A Spin Hall Ising Machine
Afshin Houshang, Mohammad Zahedinejad, Shreyas Muralidhar +3
Ising Machines (IMs) are physical systems designed to find solutions to combinatorial optimization (CO) problems mapped onto the IM via the coupling strengths of its binary spins.…
Sustained coherent spin wave emission using frequency combs
A. A. Awad, S. Muralidhar, A. Alemán +4
We demonstrate sustained coherent emission of spin waves in NiFe films using rapid demagnetization from high repetition rate femtosecond laser pulse trains. As the pulse separation…
Spin-Orbit-Torque Driven Propagating Spin Waves
Himanshu Fulara, Mohammad Zahedinejad, Roman Khymyn +4
Spin-orbit torque (SOT) can drive sustained spin wave (SW) auto-oscillations in a class of emerging microwave devices known as spin Hall nano-oscillators (SHNOs), which have highly…
Two-dimensional mutual synchronization in spin Hall nano-oscillator arrays
Mohammad Zahedinejad, Ahmad A. Awad, Shreyas Muralidhar +5
Spin Hall nano-oscillators (SHNOs) utilize pure spin currents to drive local regions of magnetic films and nanostructures into auto-oscillating precession. If such regions are plac…
Mutual synchronization of constriction-based spin Hall nano-oscillators in weak in-plane fields
Hamid Mazraati, Shreyas Muralidhar, Seyyed Ruhollah Etesami +6
We study mutual synchronization in double nanoconstriction-based spin Hall nano-oscillators (SHNOs) under weak in-plane fields ( = 30-40 mT) and also investigate…