Elham Heidari

Dr. Elham Heidari


Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
18 March 2024 in Micromachines
Verified
Journal Article
Open access
PDF file
QCQIAN CAI
QIAN CAI
JYJiachi Ye
Jiachi Ye
BJBelal Jahannia
Belal Jahannia
HWHao Wang
Hao Wang
CPChandraman Patil
Chandraman Patil
EHElham Heidari
Elham Heidari
Graphene, renowned for its exceptional electrical, optical, and mechanical properties, takes center stage in the realm of next-generation electronics. In this paper, we provide a thorough investigation into the comprehensive fabrication process of graphene field-effect transistors. Recognizing the pivotal role graphene quality plays in determining device performance, we explore many techniques and metrological methods to assess and ensure the superior quality of graphene layers. In addition, we delve into the intricate nuances of doping graphene and examine its effects on electronic properties. We uncover the transformative impact these dopants have on the charge carrier concentration, bandgap, and overall device performance. By amalgamating these critical facets of graphene field-effect transistors fabrication and analysis, this study offers a holistic understanding for researchers and engineers aiming to optimize the performance of graphene-based electronic devices.

19 July 2023 in Nanomaterials
Verified
Journal Article
Open access
PDF file
CSChen Shen
Chen Shen
JYJiachi Ye
Jiachi Ye
NPNicola Peserico
Nicola Peserico
YGYaliang Gui
Yaliang Gui
CDChaobo Dong
Chaobo Dong
HDHamed Dalir
Hamed Dalir
Metalenses are emerging as an alternative to digital micromirror devices (DMDs), with the advantages of compactness and flexibility. The exploration of metalenses has ignited enthusiasm among optical engineers, positioning them as the forthcoming frontier in technology. In this paper, we advocate for the implementation of the phase-change material, Sb2Se3, capable of providing swift, reversible, non-volatile focusing and defocusing within the 1550 nm telecom spectrum. The lens, equipped with a robust ITO microheater, offers unparalleled functionality and constitutes a significant step toward dynamic metalenses that can be integrated with beamforming applications. After a meticulously conducted microfabrication process, we showcase a device capable of rapid tuning (0.1 MHz level) for metalens focusing and defocusing at C band communication, achieved by alternating the PCM state between the amorphous and crystalline states. The findings from the experiment show that the device has a high contrast ratio for switching of 28.7 dB.

1 January 2025
Verified
Conference Paper
Closed access
PDF file
JYJiachi Ye
Jiachi Ye
QCQian Cai
Qian Cai
TWTongyao Wu
Tongyao Wu
HWHao Wang
Hao Wang
MAMohsen Ahmadian
Mohsen Ahmadian
EHElham Heidari
Elham Heidari
We propose a free-space optical system integrating orbital angular momentum modes with squeezed light generation for quantum-enhanced sensing. Our system achieves sub-shot-noise sensitivity while maintaining spatial mode selectivity through balanced homodyne detection.

1 January 2025
Verified
Conference Paper
Closed access
PDF file
TWTongyao Wu
Tongyao Wu
QCQian Cai
Qian Cai
JYJiachi Ye
Jiachi Ye
BJBelal Jahannia
Belal Jahannia
MLMing-Han Liao
Ming-Han Liao
EHElham Heidari
Elham Heidari
By leveraging exceptional point nonlinearity in a PT-symmetric directional coupler, we exploited the unconventional loss-transmission relation, achieving over 3 dB modulation and 100-fold energy reduction, indicating a large step toward highly energy-efficient photonic devices.

1 January 2025
Verified
Conference Paper
Closed access
PDF file
QCQian Cai
Qian Cai
JYJiachi Ye
Jiachi Ye
BJBelal Jahannia
Belal Jahannia
TWTongyao Wu
Tongyao Wu
HWHao Wang
Hao Wang
EHElham Heidari
Elham Heidari
High-speed optical logic gates are crucial for advancing photonic integrated circuits. The proposed reconfigurable ITO-based optical logic gate using adiabatic elimination demonstrates 89% speedup and 98% power reduction compared to conventional XNOR-Net implementation.