Design and fabrication of engineered metamaterials with negative refractive index for applications in cloaking, superlensing, and electromagnetic wave manipulation. Focus on terahertz and optical frequency ranges.
This groundbreaking research explores the design and fabrication of artificial metamaterials that exhibit extraordinary electromagnetic properties not found in natural materials. By engineering sub-wavelength structures, we achieve negative refractive index, enabling revolutionary applications in invisibility cloaking, perfect lensing, and unprecedented control over electromagnetic wave propagation.
Novel nested SRR geometry achieving broadband negative index from 0.5-2 THz with minimal losses (FOM > 20)
Cylindrical cloak design using gradient index metamaterials, achieving >90% reduction in scattering cross-section
Hyperlens design enabling λ/10 resolution imaging, surpassing the diffraction limit by 5×
Interactive 3D field patterns for metamaterial structures
Click "Generate Field Plot" above to create an interactive 3D visualization
Real-time visualization of electromagnetic wave propagation through metamaterial structures
Launch Interactive DemoDemonstration of electromagnetic cloaking using transformation optics principles
Launch Interactive DemoFrequency-dependent permittivity and permeability characteristics
Launch Interactive Demo% MATLAB Script for Metamaterial Analysis
% Split-Ring Resonator Parameter Extraction
function [eps_eff, mu_eff, n_eff] = extract_parameters(S11, S21, freq, d)
% Extract effective parameters from S-parameters
% S11, S21: Scattering parameters
% freq: Frequency array in Hz
% d: Metamaterial thickness
k0 = 2*pi*freq/3e8; % Free space wave vector
% Calculate impedance from S-parameters
Z = sqrt(((1+S11).^2 - S21.^2)./((1-S11).^2 - S21.^2));
% Calculate refractive index
exp_inkd = S21./(1 - S11.*(Z-1)./(Z+1));
n_eff = -1i*log(exp_inkd)./(k0*d);
% Ensure correct branch selection
n_eff = real(n_eff) - 1i*abs(imag(n_eff));
% Calculate permittivity and permeability
eps_eff = n_eff./Z;
mu_eff = n_eff.*Z;
% Plot results
figure;
subplot(2,2,1);
plot(freq/1e12, real(eps_eff), 'b-', freq/1e12, imag(eps_eff), 'b--');
xlabel('Frequency (THz)'); ylabel('Permittivity');
legend('Real', 'Imaginary');
subplot(2,2,2);
plot(freq/1e12, real(mu_eff), 'r-', freq/1e12, imag(mu_eff), 'r--');
xlabel('Frequency (THz)'); ylabel('Permeability');
subplot(2,2,3);
plot(freq/1e12, real(n_eff), 'g-', freq/1e12, imag(n_eff), 'g--');
xlabel('Frequency (THz)'); ylabel('Refractive Index');
subplot(2,2,4);
plot(freq/1e12, 20*log10(abs(S21)), 'k-');
xlabel('Frequency (THz)'); ylabel('Transmission (dB)');
endFull-wave electromagnetic simulations using COMSOL and CST Microwave Studio to optimize metamaterial geometries for target frequency bands
E-beam lithography and focused ion beam milling for sub-100nm feature sizes, achieving λ/20 structural precision
THz time-domain spectroscopy and near-field scanning optical microscopy for material parameter extraction
Successfully demonstrated flat lens with 0.3λ resolution and 85% efficiency at 1 THz operating frequency
Research metrics and publications will be displayed here as they become available.
Integration with phase-change materials and MEMS for dynamically reconfigurable electromagnetic properties
Exploiting quantum coherence and entanglement for next-generation metamaterial functionalities
Machine learning optimization of metamaterial geometries for multi-functional and broadband operation
Complete electromagnetic field simulation with real-time parameter adjustment
Step-by-step nanofabrication procedures and best practices
THz-TDS, SNOM, and other measurement techniques explained
Real-world applications: antennas, sensors, absorbers, and more
Comprehensive theoretical background and mathematical formulations
Key citations and foundational works in metamaterial science